Qt 5.10.1
QCommonStyle继承于QStyle QProxyStyle 继承于QCommonStyle
QStyle Class
QStyle类是一个抽象基类,它封装了GUI的外观。
Qt包含一组QStyle子类,它们模拟Qt支持的不同平台的样式(QWindowsStyle,QMacStyle等)。 默认情况下,这些样式内置于Qt GUI模块中。 样式也可以作为插件提供。
Qt的内置小部件使用QStyle执行几乎所有的绘图,确保它们看起来与等效的本机小部件完全相同。 下图显示了九种不同风格的QComboBox。
设置样式
可以使用QApplication :: setStyle()
函数设置整个应用程序的样式。 它也可以由应用程序的用户使用-style
命令行选项指定:
./myapplication -style windows
如果未指定样式,Qt将为用户的平台或桌面环境选择最合适的样式。
也可以使用QWidget::setStyle()
函数在单个小部件上设置样式。
开发Style-Aware的自定义小部件
如果您正在开发自定义小部件并希望它们在所有平台上看起来都很好,您可以使用QStyle函数来执行小部件绘图的部分,例如drawItemText()
,drawItemPixmap()
,drawPrimitive()
,drawControl()
和drawComplexControl()
。
大多数QStyle
绘制函数有四个参数:
- 枚举值,指定要绘制的图形元素
- 一个
QStyleOption
,指定呈现该元素的方式和位置 - 用于绘制元素的
QPainter
- 执行绘图的QWidget(可选)
- 一个
例如,如果要在窗口小部件上绘制焦点矩形,可以编写:
void MyWidget::paintEvent(QPaintEvent * /* event */)
{
QPainter painter(this);
QStyleOptionFocusRect option;
option.initFrom(this);
option.backgroundColor = palette().color(QPalette::Background);
style()->drawPrimitive(QStyle::PE_FrameFocusRect, &option, &painter, this);
}
QStyle
获取从QStyleOption
呈现图形元素所需的所有信息。 小部件作为最后一个参数传递,以防样式需要它来执行特殊效果(例如macOS上的动画默认按钮),但它不是必需的。 实际上,通过正确设置QPainter
,您可以使用QStyle
在任何绘图设备上绘制,而不仅仅是小部件。
QStyleOption
具有可以绘制的各种类型的图形元素的各种子类。 例如,PE_FrameFocusRect
需要QStyleOptionFocusRect
参数。
为确保绘图操作尽可能快,QStyleOption
及其子类具有公共数据成员。 有关如何使用它的详细信息,请参阅QStyleOption
类文档。
为方便起见,Qt提供了QStylePainter
类,它结合了QStyle
,QPainter
和QWidget
。
QStylePainter painter(this);
...
painter.drawPrimitive(QStyle::PE_FrameFocusRect, option);
代替
QPainter painter(this);
...
style()->drawPrimitive(QStyle::PE_FrameFocusRect, &option, &painter, this);
创建自定义样式
您可以通过创建自定义样式为应用程序创建自定义外观。创建自定义样式有两种方法。在静态方法中,您可以选择现有的QStyle类,将其子类化,然后重新实现虚函数以提供自定义行为,或者从头开始创建整个QStyle类。在动态方法中,您可以在运行时修改系统样式的行为。静态方法如下所述。动态方法在QProxyStyle中描述。
静态方法的第一步是选择Qt提供的一种样式,您将从中构建自定义样式。您选择的QStyle类将取决于哪种风格最符合您所期望的风格。您可以用作基础的最通用的类是QCommonStyles
(不是QStyle
)。这是因为Qt要求其样式为QCommonStyles
。
根据要更改的基本样式的哪些部分,必须重新实现用于绘制界面的这些部分的函数。为了说明这一点,我们将修改QWindowsStyle
绘制的spinbox箭头的外观。箭头是由drawPrimitive()
函数绘制的原始元素,因此我们需要重新实现该函数。我们需要以下类声明:
class CustomStyle : public QProxyStyle
{
Q_OBJECT
public:
CustomStyle();
~CustomStyle() {}
void drawPrimitive(PrimitiveElement element, const QStyleOption *option,QPainter *painter, const QWidget *widget) const;
};
为了绘制它的向上和向下箭头,QSpinBox
使用PE_IndicatorSpinUp
和PE_IndicatorSpinDown
元素。 以下是如何重新实现drawPrimitive()
函数以不同方式绘制它们:
void CustomStyle::drawPrimitive(PrimitiveElement element, const QStyleOption *option,
QPainter *painter, const QWidget *widget) const
{
if (element == PE_IndicatorSpinUp || element == PE_IndicatorSpinDown) {
QPolygon points(3);
int x = option->rect.x();
int y = option->rect.y();
int w = option->rect.width() / 2;
int h = option->rect.height() / 2;
x += (option->rect.width() - w) / 2;
y += (option->rect.height() - h) / 2;
if (element == PE_IndicatorSpinUp) {
points[0] = QPoint(x, y + h);
points[1] = QPoint(x + w, y + h);
points[2] = QPoint(x + w / 2, y);
} else { // PE_SpinBoxDown
points[0] = QPoint(x, y);
points[1] = QPoint(x + w, y);
points[2] = QPoint(x + w / 2, y + h);
}
if (option->state & State_Enabled) {
painter->setPen(option->palette.mid().color());
painter->setBrush(option->palette.buttonText());
} else {
painter->setPen(option->palette.buttonText().color());
painter->setBrush(option->palette.mid());
}
painter->drawPolygon(points);
} else {
QProxyStyle::drawPrimitive(element, option, painter, widget);
}
}
请注意,除了将它传递给QWindowStyle::drawPrimitive()
函数之外,我们不使用widget参数。 如前所述,QStyleOption
对象指定了有关绘制内容以及绘制方式的信息,因此无需询问窗口小部件。
如果您需要使用widget参数来获取其他信息,请在使用它之前注意确保它不是0并且它的类型正确。 例如:
const QSpinBox *spinBox = qobject_cast<const QSpinBox *>(widget);
if (spinBox) {
...
}
实现自定义样式时,您不能仅仅因为枚举值称为PE_IndicatorSpinUp
或PE_IndicatorSpinDown
而假设窗口小部件是QSpinBox。
样式示例的文档更详细地介绍了此主题。
警告:自定义QStyle
子类当前不支持Qt样式表。 我们计划在将来的某个版本中解决这个问题。
使用自定义样式
在Qt应用程序中有几种使用自定义样式的方法。 最简单的方法是在创建QApplication对象之前将自定义样式传递给QApplication::setStyle()
静态函数:
#include <QtWidgets>
#include "customstyle.h"
int main(int argc, char *argv[])
{
QApplication::setStyle(new CustomStyle);
QApplication app(argc, argv);
QSpinBox spinBox;
spinBox.show();
return app.exec();
}
您可以随时调用QApplication::setStyle()
,但通过在构造函数之前调用它,可以确保使用-style
命令行选项设置的用户首选项得到遵守。
您可能希望使自定义样式可用于其他应用程序,这些应用程序可能不属于您,因此无法重新编译。 Qt插件系统可以将样式创建为插件。 作为插件创建的样式在运行时由Qt本身作为共享对象加载。 有关如何创建样式插件的更多信息,请参阅Qt插件文档。
编译你的插件并将其放入Qt的插件/样式目录中。 我们现在有一个Qt可以自动加载的可插拔样式。 要将新样式与现有应用程序一起使用,只需使用以下参数启动应用程序:
./myapplication -style custom
应用程序将使用您实现的自定义样式的外观。
从右到左的桌面
从右到左书写的语言(例如阿拉伯语和希伯来语)通常也反映了小部件的整个布局,并要求光线来自屏幕的右上角而不是左上角。
如果创建自定义样式,则在绘制非对称元素时应特别小心,以确保它们在镜像布局中看起来也正确。 测试样式的简单方法是使用-reverse
命令行选项运行应用程序或在main()
函数中调用QApplication::setLayoutDirection()
。
在从右到左的环境中使样式运行良好时,请记住以下几点:
subControlRect()
和subElementRect()
返回屏幕坐标中的矩形
QStyleOption::direction
表示应该在哪个方向绘制项目- 如果样式不是从右到左,则会将项目显示为从左到右
visualRect()
,visualPos()
和visualAlignment()
是有用的函数,可以从逻辑表示转换为屏幕表示。alignedRect()
将返回与当前方向对齐的逻辑矩形
项目视图中的样式
视图中的项目绘制由代理执行。 Qt的默认委托QStyledItemDelegate
也用于计算项目的边界矩形,以及QStyledItemDelegate
支持的各种项目数据角色的子元素。请参阅QStyledItemDelegate
类说明以了解支持哪些数据类型和角色。您可以在模型/视图编程中阅读有关项目数据角色的更多信息。
当QStyledItemDelegate
绘制其项目时,它会绘制CE_ItemViewItem
,并使用CT_ItemViewItem
计算它们的大小。另请注意,它使用SE_ItemViewItemText
来设置编辑器的大小。在实现样式以自定义项视图的绘制时,需要检查QCommonStyle
(以及样式继承的任何其他子类)的实现。这样,您可以找出绘制其他样式元素的方式和方式,然后您可以重新实现应该以不同方式绘制的元素的绘制。
我们提供了一个小例子,我们自定义项目背景的绘图。
switch (element) {
case (PE_PanelItemViewItem): {
painter->save();
QPoint topLeft = option->rect.topLeft();
QPoint bottomRight = option->rect.topRight();
QLinearGradient backgroundGradient(topLeft, bottomRight);
backgroundGradient.setColorAt(0.0, QColor(Qt::yellow).lighter(190));
backgroundGradient.setColorAt(1.0, Qt::white);
painter->fillRect(option->rect, QBrush(backgroundGradient));
painter->restore();
break;
}
default:
QProxyStyle::drawPrimitive(element, option, painter, widget);
}
原始元素 PE_PanelItemViewItem
负责绘制项的背景,并从QCommonStyle
的CE_ItemViewItem
实现中调用。
要添加对绘制新数据类型和项数据角色的支持,必须创建自定义委托。 但是,如果您只需要支持默认委托实现的数据类型,则自定义样式不需要附带的委托。 QStyledItemDelegate
类描述提供有关自定义委托的更多信息。
项目视图标题的绘制也由样式完成,可以控制标题项的大小以及行和列大小。
另请参阅QStyleOption
,QStylePainter
,样式示例,样式和样式感知窗口小部件,QStyledItemDelegate
和样式。
成员类型文档
QStyle::ComplexControl
此枚举描述了可用的复杂控件。 复杂控件具有不同的行为,具体取决于用户单击它们的位置或按下了哪些键。
Constant | Value | Description |
---|---|---|
QStyle::CC_SpinBox | 0 | A spinbox, like QSpinBox. |
QStyle::CC_ComboBox | 1 | A combobox, like QComboBox. |
QStyle::CC_ScrollBar | 2 | A scroll bar, like QScrollBar. |
QStyle::CC_Slider | 3 | A slider, like QSlider. |
QStyle::CC_ToolButton | 4 | A tool button, like QToolButton. |
QStyle::CC_TitleBar | 5 | A Title bar, like those used in QMdiSubWindow. |
QStyle::CC_GroupBox | 7 | A group box, like QGroupBox. |
QStyle::CC_Dial | 6 | A dial, like QDial. |
QStyle::CC_MdiControls | 8 | The minimize, close, and normal button in the menu bar for a maximized MDI subwindow. |
QStyle::CC_CustomBase | 0xf0000000 | Base value for custom complex controls. Custom values must be greater than this value. |
QStyle::ContentsType
此枚举描述了可用的内容类型。 这些用于计算各种小部件内容的大小。
Constant | Value | Description |
---|---|---|
QStyle::CT_CheckBox | 1 | A check box, like QCheckBox. |
QStyle::CT_ComboBox | 4 | A combo box, like QComboBox. |
QStyle::CT_HeaderSection | 19 | A header section, like QHeader. |
QStyle::CT_LineEdit | 14 | A line edit, like QLineEdit. |
QStyle::CT_Menu | 10 | A menu, like QMenu. |
QStyle::CT_MenuBar | 9 | A menu bar, like QMenuBar. |
QStyle::CT_MenuBarItem | 8 | A menu bar item, like the buttons in a QMenuBar. |
QStyle::CT_MenuItem | 7 | A menu item, like QMenuItem. |
QStyle::CT_ProgressBar | 6 | A progress bar, like QProgressBar. |
QStyle::CT_PushButton | 0 | A push button, like QPushButton. |
QStyle::CT_RadioButton | 2 | A radio button, like QRadioButton. |
QStyle::CT_SizeGrip | 16 | A size grip, like QSizeGrip. |
QStyle::CT_Slider | 12 | A slider, like QSlider. |
QStyle::CT_ScrollBar | 13 | A scroll bar, like QScrollBar. |
QStyle::CT_SpinBox | 15 | A spin box, like QSpinBox. |
QStyle::CT_Splitter | 5 | A splitter, like QSplitter. |
QStyle::CT_TabBarTab | 11 | A tab on a tab bar, like QTabBar. |
QStyle::CT_TabWidget | 17 | A tab widget, like QTabWidget. |
QStyle::CT_ToolButton | 3 | A tool button, like QToolButton. |
QStyle::CT_GroupBox | 20 | A group box, like QGroupBox. |
QStyle::CT_ItemViewItem | 22 | An item inside an item view. |
QStyle::CT_CustomBase | 0xf0000000 | Base value for custom contents types. Custom values must be greater than this value. |
QStyle::CT_MdiControls | 21 | The minimize, normal, and close button in the menu bar for a maximized MDI subwindow. |
QStyle::ControlElement
此枚举表示控件元素。 控件元素是窗口小部件的一部分,用于执行某些操作或向用户显示信息。
Constant | Value | Description |
---|---|---|
QStyle::CE_PushButton | 0 | A QPushButton, draws CE_PushButtonBevel, CE_PushButtonLabel and PE_FrameFocusRect. |
QStyle::CE_PushButtonBevel | 1 | The bevel and default indicator of a QPushButton. |
QStyle::CE_PushButtonLabel | 2 | The label (an icon with text or pixmap) of a QPushButton. |
QStyle::CE_DockWidgetTitle | 30 | Dock window title. |
QStyle::CE_Splitter | 28 | Splitter handle; see also QSplitter. |
QStyle::CE_CheckBox | 3 | A QCheckBox, draws a PE_IndicatorCheckBox, a CE_CheckBoxLabel and a PE_FrameFocusRect. |
QStyle::CE_CheckBoxLabel | 4 | The label (text or pixmap) of a QCheckBox. |
QStyle::CE_RadioButton | 5 | A QRadioButton, draws a PE_IndicatorRadioButton, a CE_RadioButtonLabel and a PE_FrameFocusRect. |
QStyle::CE_RadioButtonLabel | 6 | The label (text or pixmap) of a QRadioButton. |
QStyle::CE_TabBarTab | 7 | The tab and label within a QTabBar. |
QStyle::CE_TabBarTabShape | 8 | The tab shape within a tab bar. |
QStyle::CE_TabBarTabLabel | 9 | The label within a tab. |
QStyle::CE_ProgressBar | 10 | A QProgressBar, draws CE_ProgressBarGroove, CE_ProgressBarContents and CE_ProgressBarLabel. |
QStyle::CE_ProgressBarGroove | 11 | The groove where the progress indicator is drawn in a QProgressBar. |
QStyle::CE_ProgressBarContents | 12 | The progress indicator of a QProgressBar. |
QStyle::CE_ProgressBarLabel | 13 | The text label of a QProgressBar. |
QStyle::CE_ToolButtonLabel | 22 | A tool button’s label. |
QStyle::CE_MenuBarItem | 20 | A menu item in a QMenuBar. |
QStyle::CE_MenuBarEmptyArea | 21 | The empty area of a QMenuBar. |
QStyle::CE_MenuItem | 14 | A menu item in a QMenu. |
QStyle::CE_MenuScroller | 15 | Scrolling areas in a QMenu when the style supports scrolling. |
QStyle::CE_MenuTearoff | 18 | A menu item representing the tear off section of a QMenu. |
QStyle::CE_MenuEmptyArea | 19 | The area in a menu without menu items. |
QStyle::CE_MenuHMargin | 17 | The horizontal extra space on the left/right of a menu. |
QStyle::CE_MenuVMargin | 16 | The vertical extra space on the top/bottom of a menu. |
QStyle::CE_ToolBoxTab | 26 | The toolbox’s tab and label within a QToolBox. |
QStyle::CE_SizeGrip | 27 | Window resize handle; see also QSizeGrip. |
QStyle::CE_Header | 23 | A header. |
QStyle::CE_HeaderSection | 24 | A header section. |
QStyle::CE_HeaderLabel | 25 | The header’s label. |
QStyle::CE_ScrollBarAddLine | 31 | Scroll bar line increase indicator. (i.e., scroll down); see also QScrollBar. |
QStyle::CE_ScrollBarSubLine | 32 | Scroll bar line decrease indicator (i.e., scroll up). |
QStyle::CE_ScrollBarAddPage | 33 | Scolllbar page increase indicator (i.e., page down). |
QStyle::CE_ScrollBarSubPage | 34 | Scroll bar page decrease indicator (i.e., page up). |
QStyle::CE_ScrollBarSlider | 35 | Scroll bar slider. |
QStyle::CE_ScrollBarFirst | 36 | Scroll bar first line indicator (i.e., home). |
QStyle::CE_ScrollBarLast | 37 | Scroll bar last line indicator (i.e., end). |
QStyle::CE_RubberBand | 29 | Rubber band used in for example an icon view. |
QStyle::CE_FocusFrame | 38 | Focus frame that is style controlled. |
QStyle::CE_ItemViewItem | 45 | An item inside an item view. |
QStyle::CE_CustomBase | 0xf0000000 | Base value for custom control elements; custom values must be greater than this value. |
QStyle::CE_ComboBoxLabel | 39 | The label of a non-editable QComboBox. |
QStyle::CE_ToolBar | 40 | A toolbar like QToolBar. |
QStyle::CE_ToolBoxTabShape | 41 | The toolbox’s tab shape. |
QStyle::CE_ToolBoxTabLabel | 42 | The toolbox’s tab label. |
QStyle::CE_HeaderEmptyArea | 43 | The area of a header view where there are no header sections. |
QStyle::CE_ShapedFrame | 46 | The frame with the shape specified in the QStyleOptionFrame; see QFrame. |
QStyle::PixelMetric
此枚举描述了各种可用的像素指标。 像素度量是由单个像素值表示的样式相关大小。
Constant | Value | Description |
---|---|---|
QStyle::PM_ButtonMargin | 0 | Amount of whitespace between push button labels and the frame. |
QStyle::PM_DockWidgetTitleBarButtonMargin | ? | Amount of whitespace between dock widget’s title bar button labels and the frame. |
QStyle::PM_ButtonDefaultIndicator | 1 | Width of the default-button indicator frame. |
QStyle::PM_MenuButtonIndicator | 2 | Width of the menu button indicator proportional to the widget height. |
QStyle::PM_ButtonShiftHorizontal | 3 | Horizontal contents shift of a button when the button is down. |
QStyle::PM_ButtonShiftVertical | 4 | Vertical contents shift of a button when the button is down. |
QStyle::PM_DefaultFrameWidth | 5 | Default frame width (usually 2). |
QStyle::PM_SpinBoxFrameWidth | 6 | Frame width of a spin box, defaults to PM_DefaultFrameWidth. |
QStyle::PM_ComboBoxFrameWidth | 7 | Frame width of a combo box, defaults to PM_DefaultFrameWidth. |
QStyle::PM_MDIFrameWidth | PM_MdiSubWindowFrameWidth | Obsolete. Use PM_MdiSubWindowFrameWidth instead. |
QStyle::PM_MdiSubWindowFrameWidth | 44 | Frame width of an MDI window. |
QStyle::PM_MDIMinimizedWidth | PM_MdiSubWindowMinimizedWidth | Obsolete. Use PM_MdiSubWindowMinimizedWidth instead. |
QStyle::PM_MdiSubWindowMinimizedWidth | ? | Width of a minimized MDI window. |
QStyle::PM_LayoutLeftMargin | ? | Default left margin for a QLayout. |
QStyle::PM_LayoutTopMargin | ? | Default top margin for a QLayout. |
QStyle::PM_LayoutRightMargin | ? | Default right margin for a QLayout. |
QStyle::PM_LayoutBottomMargin | ? | Default bottom margin for a QLayout. |
QStyle::PM_LayoutHorizontalSpacing | ? | Default horizontal spacing for a QLayout. |
QStyle::PM_LayoutVerticalSpacing | ? | Default vertical spacing for a QLayout. |
QStyle::PM_MaximumDragDistance | 8 | The maximum allowed distance between the mouse and a scrollbar when dragging. Exceeding the specified distance will cause the slider to jump back to the original position; a value of -1 disables this behavior. |
QStyle::PM_ScrollBarExtent | 9 | Width of a vertical scroll bar and the height of a horizontal scroll bar. |
QStyle::PM_ScrollBarSliderMin | 10 | The minimum height of a vertical scroll bar’s slider and the minimum width of a horizontal scroll bar’s slider. |
QStyle::PM_SliderThickness | 11 | Total slider thickness. |
QStyle::PM_SliderControlThickness | 12 | Thickness of the slider handle. |
QStyle::PM_SliderLength | 13 | Length of the slider. |
QStyle::PM_SliderTickmarkOffset | 14 | The offset between the tickmarks and the slider. |
QStyle::PM_SliderSpaceAvailable | 15 | The available space for the slider to move. |
QStyle::PM_DockWidgetSeparatorExtent | 16 | Width of a separator in a horizontal dock window and the height of a separator in a vertical dock window. |
QStyle::PM_DockWidgetHandleExtent | 17 | Width of the handle in a horizontal dock window and the height of the handle in a vertical dock window. |
QStyle::PM_DockWidgetFrameWidth | 18 | Frame width of a dock window. |
QStyle::PM_DockWidgetTitleMargin | ? | Margin of the dock window title. |
QStyle::PM_MenuBarPanelWidth | 33 | Frame width of a menu bar, defaults to PM_DefaultFrameWidth. |
QStyle::PM_MenuBarItemSpacing | 34 | Spacing between menu bar items. |
QStyle::PM_MenuBarHMargin | 36 | Spacing between menu bar items and left/right of bar. |
QStyle::PM_MenuBarVMargin | 35 | Spacing between menu bar items and top/bottom of bar. |
QStyle::PM_ToolBarFrameWidth | ? | Width of the frame around toolbars. |
QStyle::PM_ToolBarHandleExtent | ? | Width of a toolbar handle in a horizontal toolbar and the height of the handle in a vertical toolbar. |
QStyle::PM_ToolBarItemMargin | ? | Spacing between the toolbar frame and the items. |
QStyle::PM_ToolBarItemSpacing | ? | Spacing between toolbar items. |
QStyle::PM_ToolBarSeparatorExtent | ? | Width of a toolbar separator in a horizontal toolbar and the height of a separator in a vertical toolbar. |
QStyle::PM_ToolBarExtensionExtent | ? | Width of a toolbar extension button in a horizontal toolbar and the height of the button in a vertical toolbar. |
QStyle::PM_TabBarTabOverlap | 19 | Number of pixels the tabs should overlap. (Currently only used in styles, not inside of QTabBar) |
QStyle::PM_TabBarTabHSpace | 20 | Extra space added to the tab width. |
QStyle::PM_TabBarTabVSpace | 21 | Extra space added to the tab height. |
QStyle::PM_TabBarBaseHeight | 22 | Height of the area between the tab bar and the tab pages. |
QStyle::PM_TabBarBaseOverlap | 23 | Number of pixels the tab bar overlaps the tab bar base. |
QStyle::PM_TabBarScrollButtonWidth | ? | |
QStyle::PM_TabBarTabShiftHorizontal | ? | Horizontal pixel shift when a tab is selected. |
QStyle::PM_TabBarTabShiftVertical | ? | Vertical pixel shift when a tab is selected. |
QStyle::PM_ProgressBarChunkWidth | 24 | Width of a chunk in a progress bar indicator. |
QStyle::PM_SplitterWidth | 25 | Width of a splitter. |
QStyle::PM_TitleBarHeight | 26 | Height of the title bar. |
QStyle::PM_IndicatorWidth | 37 | Width of a check box indicator. |
QStyle::PM_IndicatorHeight | 38 | Height of a checkbox indicator. |
QStyle::PM_ExclusiveIndicatorWidth | 39 | Width of a radio button indicator. |
QStyle::PM_ExclusiveIndicatorHeight | 40 | Height of a radio button indicator. |
QStyle::PM_MenuPanelWidth | 30 | Border width (applied on all sides) for a QMenu. |
QStyle::PM_MenuHMargin | 28 | Additional border (used on left and right) for a QMenu. |
QStyle::PM_MenuVMargin | 29 | Additional border (used for bottom and top) for a QMenu. |
QStyle::PM_MenuScrollerHeight | 27 | Height of the scroller area in a QMenu. |
QStyle::PM_MenuTearoffHeight | 31 | Height of a tear off area in a QMenu. |
QStyle::PM_MenuDesktopFrameWidth | 32 | The frame width for the menu on the desktop. |
QStyle::PM_HeaderMarkSize | ? | The size of the sort indicator in a header. |
QStyle::PM_HeaderGripMargin | ? | The size of the resize grip in a header. |
QStyle::PM_HeaderMargin | ? | The size of the margin between the sort indicator and the text. |
QStyle::PM_SpinBoxSliderHeight | ? | The height of the optional spin box slider. |
QStyle::PM_ToolBarIconSize | ? | Default tool bar icon size |
QStyle::PM_SmallIconSize | ? | Default small icon size |
QStyle::PM_LargeIconSize | ? | Default large icon size |
QStyle::PM_FocusFrameHMargin | ? | Horizontal margin that the focus frame will outset the widget by. |
QStyle::PM_FocusFrameVMargin | ? | Vertical margin that the focus frame will outset the widget by. |
QStyle::PM_IconViewIconSize | ? | The default size for icons in an icon view. |
QStyle::PM_ListViewIconSize | ? | The default size for icons in a list view. |
QStyle::PM_ToolTipLabelFrameWidth | ? | The frame width for a tool tip label. |
QStyle::PM_CheckBoxLabelSpacing | ? | The spacing between a check box indicator and its label. |
QStyle::PM_RadioButtonLabelSpacing | ? | The spacing between a radio button indicator and its label. |
QStyle::PM_TabBarIconSize | ? | The default icon size for a tab bar. |
QStyle::PM_SizeGripSize | ? | The size of a size grip. |
QStyle::PM_MessageBoxIconSize | ? | The size of the standard icons in a message box |
QStyle::PM_ButtonIconSize | ? | The default size of button icons |
QStyle::PM_TextCursorWidth | ? | The width of the cursor in a line edit or text edit |
QStyle::PM_TabBar_ScrollButtonOverlap | ? | The distance between the left and right buttons in a tab bar. |
QStyle::PM_TabCloseIndicatorWidth | ? | The default width of a close button on a tab in a tab bar. |
QStyle::PM_TabCloseIndicatorHeight | ? | The default height of a close button on a tab in a tab bar. |
QStyle::PM_ScrollView_ScrollBarSpacing | ? | Distance between frame and scrollbar with SH_ScrollView_FrameOnlyAroundContents set. |
QStyle::PM_ScrollView_ScrollBarOverlap | ? | Overlap between scroll bars and scroll content |
QStyle::PM_SubMenuOverlap | ? | The horizontal overlap between a submenu and its parent. |
QStyle::PM_TreeViewIndentation | ? | The indentation of items in a tree view. This enum value has been introduced in Qt 5.4. |
QStyle::PM_HeaderDefaultSectionSizeHorizontal | ? | The default size of sections in a horizontal header. This enum value has been introduced in Qt 5.5. |
QStyle::PM_HeaderDefaultSectionSizeVertical | ? | The default size of sections in a vertical header. This enum value has been introduced in Qt 5.5. |
QStyle::PM_TitleBarButtonIconSize | ? | The size of button icons on a title bar. This enum value has been introduced in Qt 5.8. |
QStyle::PM_TitleBarButtonSize | ? | The size of buttons on a title bar. This enum value has been introduced in Qt 5.8. |
QStyle::PM_CustomBase | 0xf0000000 | Base value for custom pixel metrics. Custom values must be greater than this value. |
已弃用的枚举变量:
Constant | Value | Description |
---|---|---|
QStyle::PM_DefaultTopLevelMargin | ? | Use PM_LayoutLeftMargin, PM_LayoutTopMargin, PM_LayoutRightMargin, and PM_LayoutBottomMargin instead. |
QStyle::PM_DefaultChildMargin | ? | Use PM_LayoutLeftMargin, PM_LayoutTopMargin, PM_LayoutRightMargin, and PM_LayoutBottomMargin instead. |
QStyle::PM_DefaultLayoutSpacing | ? | Use PM_LayoutHorizontalSpacing and PM_LayoutVerticalSpacing instead. |
QStyle::PrimitiveElement
这个枚举描述了各种原始元素。 原始元素是常见的GUI元素,例如复选框指示符或按钮斜角。
Constant | Value | Description |
---|---|---|
QStyle::PE_FrameStatusBar | 7 | Obsolete. Use PE_FrameStatusBarItem instead. |
QStyle::PE_PanelButtonCommand | ? | Button used to initiate an action, for example, a QPushButton. |
QStyle::PE_FrameDefaultButton | 1 | This frame around a default button, e.g. in a dialog. |
QStyle::PE_PanelButtonBevel | ? | Generic panel with a button bevel. |
QStyle::PE_PanelButtonTool | ? | Panel for a Tool button, used with QToolButton. |
QStyle::PE_PanelLineEdit | ? | Panel for a QLineEdit. |
QStyle::PE_IndicatorButtonDropDown | ? | Indicator for a drop down button, for example, a tool button that displays a menu. |
QStyle::PE_FrameFocusRect | 3 | Generic focus indicator. |
QStyle::PE_IndicatorArrowUp | ? | Generic Up arrow. |
QStyle::PE_IndicatorArrowDown | ? | Generic Down arrow. |
QStyle::PE_IndicatorArrowRight | ? | Generic Right arrow. |
QStyle::PE_IndicatorArrowLeft | ? | Generic Left arrow. |
QStyle::PE_IndicatorSpinUp | ? | Up symbol for a spin widget, for example a QSpinBox. |
QStyle::PE_IndicatorSpinDown | ? | Down symbol for a spin widget. |
QStyle::PE_IndicatorSpinPlus | ? | Increase symbol for a spin widget. |
QStyle::PE_IndicatorSpinMinus | ? | Decrease symbol for a spin widget. |
QStyle::PE_IndicatorItemViewItemCheck | PE_IndicatorViewItemCheck | On/off indicator for a view item. |
QStyle::PE_IndicatorCheckBox | ? | On/off indicator, for example, a QCheckBox. |
QStyle::PE_IndicatorRadioButton | ? | Exclusive on/off indicator, for example, a QRadioButton. |
QStyle::PE_IndicatorDockWidgetResizeHandle | ? | Resize handle for dock windows. |
QStyle::PE_Frame | 0 | Generic frame |
QStyle::PE_FrameMenu | 6 | Frame for popup windows/menus; see also QMenu. |
QStyle::PE_PanelMenuBar | ? | Panel for menu bars. |
QStyle::PE_PanelScrollAreaCorner | ? | Panel at the bottom-right (or bottom-left) corner of a scroll area. |
QStyle::PE_FrameDockWidget | 2 | Panel frame for dock windows and toolbars. |
QStyle::PE_FrameTabWidget | ? | Frame for tab widgets. |
QStyle::PE_FrameLineEdit | 5 | Panel frame for line edits. |
QStyle::PE_FrameGroupBox | 4 | Panel frame around group boxes. |
QStyle::PE_FrameButtonBevel | ? | Panel frame for a button bevel. |
QStyle::PE_FrameButtonTool | ? | Panel frame for a tool button. |
QStyle::PE_IndicatorHeaderArrow | ? | Arrow used to indicate sorting on a list or table header. |
QStyle::PE_FrameStatusBarItem | PE_FrameStatusBar | Frame for an item of a status bar; see also QStatusBar. |
QStyle::PE_FrameWindow | ? | Frame around a MDI window or a docking window. |
QStyle::PE_IndicatorMenuCheckMark | ? | Check mark used in a menu. |
QStyle::PE_IndicatorProgressChunk | ? | Section of a progress bar indicator; see also QProgressBar. |
QStyle::PE_IndicatorBranch | ? | Lines used to represent the branch of a tree in a tree view. |
QStyle::PE_IndicatorToolBarHandle | ? | The handle of a toolbar. |
QStyle::PE_IndicatorToolBarSeparator | ? | The separator in a toolbar. |
QStyle::PE_PanelToolBar | ? | The panel for a toolbar. |
QStyle::PE_PanelTipLabel | ? | The panel for a tip label. |
QStyle::PE_FrameTabBarBase | ? | The frame that is drawn for a tab bar, ususally drawn for a tab bar that isn’t part of a tab widget. |
QStyle::PE_IndicatorTabTear | ? | Deprecated. Use PE_IndicatorTabTearLeft instead. |
QStyle::PE_IndicatorTabTearLeft | PE_IndicatorTabTear | An indicator that a tab is partially scrolled out on the left side of the visible tab bar when there are many tabs. |
QStyle::PE_IndicatorTabTearRight | ? | An indicator that a tab is partially scrolled out on the right side of the visible tab bar when there are many tabs. |
QStyle::PE_IndicatorColumnViewArrow | ? | An arrow in a QColumnView. |
QStyle::PE_Widget | ? | A plain QWidget. |
QStyle::PE_CustomBase | 0xf000000 | Base value for custom primitive elements. All values above this are reserved for custom use. Custom values must be greater than this value. |
QStyle::PE_IndicatorItemViewItemDrop | ? | An indicator that is drawn to show where an item in an item view is about to be dropped during a drag-and-drop operation in an item view. |
QStyle::PE_PanelItemViewItem | ? | The background for an item in an item view. |
QStyle::PE_PanelItemViewRow | ? | The background of a row in an item view. |
QStyle::PE_PanelStatusBar | ? | The panel for a status bar. |
QStyle::PE_IndicatorTabClose | ? | The close button on a tab bar. |
QStyle::PE_PanelMenu | ? | The panel for a menu. |
QStyle::RequestSoftwareInputPanel
此枚举描述了在什么情况下,具有输入功能的小部件将请求软件输入面板。
Constant | Value | Description |
---|---|---|
QStyle::RSIP_OnMouseClickAndAlreadyFocused | 0 | Requests an input panel if the user clicks on the widget, but only if it is already focused. |
QStyle::RSIP_OnMouseClick | 1 | Requests an input panel if the user clicks on the widget. |
QStyle::StandardPixmap
此枚举描述了可用的标准像素图。 标准像素图是一种像素图,可以遵循一些现有的GUI样式或指南。
Constant | Value | Description |
---|---|---|
QStyle::SP_TitleBarMinButton | 1 | Minimize button on title bars (e.g., in QMdiSubWindow). |
QStyle::SP_TitleBarMenuButton | 0 | Menu button on a title bar. |
QStyle::SP_TitleBarMaxButton | 2 | Maximize button on title bars. |
QStyle::SP_TitleBarCloseButton | 3 | Close button on title bars. |
QStyle::SP_TitleBarNormalButton | 4 | Normal (restore) button on title bars. |
QStyle::SP_TitleBarShadeButton | 5 | Shade button on title bars. |
QStyle::SP_TitleBarUnshadeButton | 6 | Unshade button on title bars. |
QStyle::SP_TitleBarContextHelpButton | 7 | The Context help button on title bars. |
QStyle::SP_MessageBoxInformation | 9 | The “information” icon. |
QStyle::SP_MessageBoxWarning | 10 | The “warning” icon. |
QStyle::SP_MessageBoxCritical | 11 | The “critical” icon. |
QStyle::SP_MessageBoxQuestion | 12 | The “question” icon. |
QStyle::SP_DesktopIcon | 13 | The “desktop” icon. |
QStyle::SP_TrashIcon | 14 | The “trash” icon. |
QStyle::SP_ComputerIcon | 15 | The “My computer” icon. |
QStyle::SP_DriveFDIcon | 16 | The floppy icon. |
QStyle::SP_DriveHDIcon | 17 | The harddrive icon. |
QStyle::SP_DriveCDIcon | 18 | The CD icon. |
QStyle::SP_DriveDVDIcon | 19 | The DVD icon. |
QStyle::SP_DriveNetIcon | 20 | The network icon. |
QStyle::SP_DirHomeIcon | 56 | The home directory icon. |
QStyle::SP_DirOpenIcon | 21 | The open directory icon. |
QStyle::SP_DirClosedIcon | 22 | The closed directory icon. |
QStyle::SP_DirIcon | 38 | The directory icon. |
QStyle::SP_DirLinkIcon | 23 | The link to directory icon. |
QStyle::SP_DirLinkOpenIcon | 24 | The link to open directory icon. |
QStyle::SP_FileIcon | 25 | The file icon. |
QStyle::SP_FileLinkIcon | 26 | The link to file icon. |
QStyle::SP_FileDialogStart | 29 | The “start” icon in a file dialog. |
QStyle::SP_FileDialogEnd | 30 | The “end” icon in a file dialog. |
QStyle::SP_FileDialogToParent | 31 | The “parent directory” icon in a file dialog. |
QStyle::SP_FileDialogNewFolder | 32 | The “create new folder” icon in a file dialog. |
QStyle::SP_FileDialogDetailedView | 33 | The detailed view icon in a file dialog. |
QStyle::SP_FileDialogInfoView | 34 | The file info icon in a file dialog. |
QStyle::SP_FileDialogContentsView | 35 | The contents view icon in a file dialog. |
QStyle::SP_FileDialogListView | 36 | The list view icon in a file dialog. |
QStyle::SP_FileDialogBack | 37 | The back arrow in a file dialog. |
QStyle::SP_DockWidgetCloseButton | 8 | Close button on dock windows (see also QDockWidget). |
QStyle::SP_ToolBarHorizontalExtensionButton | 27 | Extension button for horizontal toolbars. |
QStyle::SP_ToolBarVerticalExtensionButton | 28 | Extension button for vertical toolbars. |
QStyle::SP_DialogOkButton | 39 | Icon for a standard OK button in a QDialogButtonBox. |
QStyle::SP_DialogCancelButton | 40 | Icon for a standard Cancel button in a QDialogButtonBox. |
QStyle::SP_DialogHelpButton | 41 | Icon for a standard Help button in a QDialogButtonBox. |
QStyle::SP_DialogOpenButton | 42 | Icon for a standard Open button in a QDialogButtonBox. |
QStyle::SP_DialogSaveButton | 43 | Icon for a standard Save button in a QDialogButtonBox. |
QStyle::SP_DialogCloseButton | 44 | Icon for a standard Close button in a QDialogButtonBox. |
QStyle::SP_DialogApplyButton | 45 | Icon for a standard Apply button in a QDialogButtonBox. |
QStyle::SP_DialogResetButton | 46 | Icon for a standard Reset button in a QDialogButtonBox. |
QStyle::SP_DialogDiscardButton | 47 | Icon for a standard Discard button in a QDialogButtonBox. |
QStyle::SP_DialogYesButton | 48 | Icon for a standard Yes button in a QDialogButtonBox. |
QStyle::SP_DialogNoButton | 49 | Icon for a standard No button in a QDialogButtonBox. |
QStyle::SP_ArrowUp | 50 | Icon arrow pointing up. |
QStyle::SP_ArrowDown | 51 | Icon arrow pointing down. |
QStyle::SP_ArrowLeft | 52 | Icon arrow pointing left. |
QStyle::SP_ArrowRight | 53 | Icon arrow pointing right. |
QStyle::SP_ArrowBack | 54 | Equivalent to SP_ArrowLeft when the current layout direction is Qt::LeftToRight, otherwise SP_ArrowRight. |
QStyle::SP_ArrowForward | 55 | Equivalent to SP_ArrowRight when the current layout direction is Qt::LeftToRight, otherwise SP_ArrowLeft. |
QStyle::SP_CommandLink | 57 | Icon used to indicate a Vista style command link glyph. |
QStyle::SP_VistaShield | 58 | Icon used to indicate UAC prompts on Windows Vista. This will return a null pixmap or icon on all other platforms. |
QStyle::SP_BrowserReload | 59 | Icon indicating that the current page should be reloaded. |
QStyle::SP_BrowserStop | 60 | Icon indicating that the page loading should stop. |
QStyle::SP_MediaPlay | 61 | Icon indicating that media should begin playback. |
QStyle::SP_MediaStop | 62 | Icon indicating that media should stop playback. |
QStyle::SP_MediaPause | 63 | Icon indicating that media should pause playback. |
QStyle::SP_MediaSkipForward | 64 | Icon indicating that media should skip forward. |
QStyle::SP_MediaSkipBackward | 65 | Icon indicating that media should skip backward. |
QStyle::SP_MediaSeekForward | 66 | Icon indicating that media should seek forward. |
QStyle::SP_MediaSeekBackward | 67 | Icon indicating that media should seek backward. |
QStyle::SP_MediaVolume | 68 | Icon indicating a volume control. |
QStyle::SP_MediaVolumeMuted | 69 | Icon indicating a muted volume control. |
QStyle::SP_LineEditClearButton | 70 | Icon for a standard clear button in a QLineEdit. This enum value was added in Qt 5.2. |
QStyle::SP_CustomBase | 0xf0000000 | Base value for custom standard pixmaps; custom values must be greater than this value. |
QStyle::StateFlag
flags QStyle::State
此枚举描述了绘制基元元素时使用的标志。
请注意,并非所有基元都使用所有这些标志,并且标志可能对不同的项目意味着不同的东西。
Constant | Value | Description |
---|---|---|
QStyle::State_None | 0x00000000 | Indicates that the widget does not have a state. |
QStyle::State_Active | 0x00010000 | Indicates that the widget is active. |
QStyle::State_AutoRaise | 0x00001000 | Used to indicate if auto-raise appearance should be used on a tool button. |
QStyle::State_Children | 0x00080000 | Used to indicate if an item view branch has children. |
QStyle::State_DownArrow | 0x00000040 | Used to indicate if a down arrow should be visible on the widget. |
QStyle::State_Editing | 0x00400000 | Used to indicate if an editor is opened on the widget. |
QStyle::State_Enabled | 0x00000001 | Used to indicate if the widget is enabled. |
QStyle::State_HasEditFocus | 0x01000000 | Used to indicate if the widget currently has edit focus. |
QStyle::State_HasFocus | 0x00000100 | Used to indicate if the widget has focus. |
QStyle::State_Horizontal | 0x00000080 | Used to indicate if the widget is laid out horizontally, for example. a tool bar. |
QStyle::State_KeyboardFocusChange | 0x00800000 | Used to indicate if the focus was changed with the keyboard, e.g., tab, backtab or shortcut. |
QStyle::State_MouseOver | 0x00002000 | Used to indicate if the widget is under the mouse. |
QStyle::State_NoChange | 0x00000010 | Used to indicate a tri-state checkbox. |
QStyle::State_Off | 0x00000008 | Used to indicate if the widget is not checked. |
QStyle::State_On | 0x00000020 | Used to indicate if the widget is checked. |
QStyle::State_Raised | 0x00000002 | Used to indicate if a button is raised. |
QStyle::State_ReadOnly | 0x02000000 | Used to indicate if a widget is read-only. |
QStyle::State_Selected | 0x00008000 | Used to indicate if a widget is selected. |
QStyle::State_Item | 0x00100000 | Used by item views to indicate if a horizontal branch should be drawn. |
QStyle::State_Open | 0x00040000 | Used by item views to indicate if the tree branch is open. |
QStyle::State_Sibling | 0x00200000 | Used by item views to indicate if a vertical line needs to be drawn (for siblings). |
QStyle::State_Sunken | 0x00000004 | Used to indicate if the widget is sunken or pressed. |
QStyle::State_UpArrow | 0x00004000 | Used to indicate if an up arrow should be visible on the widget. |
QStyle::State_Mini | 0x08000000 | Used to indicate a mini style Mac widget or button. |
QStyle::State_Small | 0x04000000 | Used to indicate a small style Mac widget or button. |
State类型是QFlags 的typedef。 它存储StateFlag值的OR组合。
QStyle::StyleHint
此枚举描述了可用的样式提示。 样式提示是一般外观或感觉提示。
Constant | Value | Description |
---|---|---|
QStyle::SH_EtchDisabledText | 0 | Disabled text is “etched” as it is on Windows. |
QStyle::SH_DitherDisabledText | 1 | Disabled text is dithered as it is on Motif. |
QStyle::SH_ScrollBar_ContextMenu | ? | Whether or not a scroll bar has a context menu. |
QStyle::SH_ScrollBar_MiddleClickAbsolutePosition | 2 | A boolean value. If true, middle clicking on a scroll bar causes the slider to jump to that position. If false, middle clicking is ignored. |
QStyle::SH_ScrollBar_LeftClickAbsolutePosition | ? | A boolean value. If true, left clicking on a scroll bar causes the slider to jump to that position. If false, left clicking will behave as appropriate for each control. |
QStyle::SH_ScrollBar_ScrollWhenPointerLeavesControl | 3 | A boolean value. If true, when clicking a scroll bar SubControl, holding the mouse button down and moving the pointer outside the SubControl, the scroll bar continues to scroll. If false, the scollbar stops scrolling when the pointer leaves the SubControl. |
QStyle::SH_ScrollBar_RollBetweenButtons | ? | A boolean value. If true, when clicking a scroll bar button (SC_ScrollBarAddLine or SC_ScrollBarSubLine) and dragging over to the opposite button (rolling) will press the new button and release the old one. When it is false, the original button is released and nothing happens (like a push button). |
QStyle::SH_TabBar_Alignment | 5 | The alignment for tabs in a QTabWidget. Possible values are Qt::AlignLeft, Qt::AlignCenter and Qt::AlignRight. |
QStyle::SH_Header_ArrowAlignment | 6 | The placement of the sorting indicator may appear in list or table headers. Possible values are Qt::Alignment values (that is, an OR combination of Qt::AlignmentFlag flags). |
QStyle::SH_Slider_SnapToValue | 7 | Sliders snap to values while moving, as they do on Windows. |
QStyle::SH_Slider_SloppyKeyEvents | 8 | Key presses handled in a sloppy manner, i.e., left on a vertical slider subtracts a line. |
QStyle::SH_ProgressDialog_CenterCancelButton | 9 | Center button on progress dialogs, otherwise right aligned. |
QStyle::SH_ProgressDialog_TextLabelAlignment | 10 | The alignment for text labels in progress dialogs; Qt::AlignCenter on Windows, Qt::AlignVCenter otherwise. |
QStyle::SH_PrintDialog_RightAlignButtons | 11 | Right align buttons in the print dialog, as done on Windows. |
QStyle::SH_MainWindow_SpaceBelowMenuBar | 12 | One or two pixel space between the menu bar and the dockarea, as done on Windows. |
QStyle::SH_FontDialog_SelectAssociatedText | 13 | Select the text in the line edit, or when selecting an item from the listbox, or when the line edit receives focus, as done on Windows. |
QStyle::SH_Menu_KeyboardSearch | ? | Typing causes a menu to be search for relevant items, otherwise only mnemnonic is considered. |
QStyle::SH_Menu_AllowActiveAndDisabled | 14 | Allows disabled menu items to be active. |
QStyle::SH_Menu_SpaceActivatesItem | 15 | Pressing the space bar activates the item, as done on Motif. |
QStyle::SH_Menu_SubMenuPopupDelay | 16 | The number of milliseconds to wait before opening a submenu (256 on Windows, 96 on Motif). |
QStyle::SH_Menu_Scrollable | ? | Whether popup menus must support scrolling. |
QStyle::SH_Menu_SloppySubMenus | ? | Whether popup menus must support the user moving the mouse cursor to a submenu while crossing other items of the menu. This is supported on most modern desktop platforms. |
QStyle::SH_Menu_SubMenuUniDirection | ? | Since Qt 5.5. If the cursor has to move towards the submenu (like it is on macOS), or if the cursor can move in any direction as long as it reaches the submenu before the sloppy timeout. |
QStyle::SH_Menu_SubMenuUniDirectionFailCount | ? | Since Qt 5.5. When SH_Menu_SubMenuUniDirection is defined this enum defines the number of failed mouse moves before the sloppy submenu is discarded. This can be used to control the “strictness” of the uni direction algorithm. |
QStyle::SH_Menu_SubMenuSloppySelectOtherActions | ? | Since Qt 5.5. Should other action items be selected when the mouse moves towards a sloppy submenu. |
QStyle::SH_Menu_SubMenuSloppyCloseTimeout | ? | Since Qt 5.5. The timeout used to close sloppy submenus. |
QStyle::SH_Menu_SubMenuResetWhenReenteringParent | ? | Since Qt 5.5. When entering parent from child submenu, should the sloppy state be reset, effectively closing the child and making the current submenu active. |
QStyle::SH_Menu_SubMenuDontStartSloppyOnLeave | ? | Since Qt 5.5. Do not start sloppy timers when the mouse leaves a sub-menu. |
QStyle::SH_ScrollView_FrameOnlyAroundContents | 17 | Whether scrollviews draw their frame only around contents (like Motif), or around contents, scroll bars and corner widgets (like Windows). |
QStyle::SH_MenuBar_AltKeyNavigation | 18 | Menu bars items are navigable by pressing Alt, followed by using the arrow keys to select the desired item. |
QStyle::SH_ComboBox_ListMouseTracking | 19 | Mouse tracking in combobox drop-down lists. |
QStyle::SH_Menu_MouseTracking | 20 | Mouse tracking in popup menus. |
QStyle::SH_MenuBar_MouseTracking | 21 | Mouse tracking in menu bars. |
QStyle::SH_Menu_FillScreenWithScroll | ? | Whether scrolling popups should fill the screen as they are scrolled. |
QStyle::SH_Menu_SelectionWrap | ? | Whether popups should allow the selections to wrap, that is when selection should the next item be the first item. |
QStyle::SH_ItemView_ChangeHighlightOnFocus | 22 | Gray out selected items when losing focus. |
QStyle::SH_Widget_ShareActivation | 23 | Turn on sharing activation with floating modeless dialogs. |
QStyle::SH_TabBar_SelectMouseType | 4 | Which type of mouse event should cause a tab to be selected. |
QStyle::SH_ListViewExpand_SelectMouseType | ? | Which type of mouse event should cause a list view expansion to be selected. |
QStyle::SH_TabBar_PreferNoArrows | ? | Whether a tab bar should suggest a size to prevent scoll arrows. |
QStyle::SH_ComboBox_Popup | 25 | Allows popups as a combobox drop-down menu. |
QStyle::SH_Workspace_FillSpaceOnMaximize | 24 | The workspace should maximize the client area. |
QStyle::SH_TitleBar_NoBorder | 26 | The title bar has no border. |
QStyle::SH_ScrollBar_StopMouseOverSlider | SH_Slider_StopMouseOverSlider | Obsolete. Use SH_Slider_StopMouseOverSlider instead. |
QStyle::SH_Slider_StopMouseOverSlider | 27 | Stops auto-repeat when the slider reaches the mouse position. |
QStyle::SH_BlinkCursorWhenTextSelected | ? | Whether cursor should blink when text is selected. |
QStyle::SH_RichText_FullWidthSelection | ? | Whether richtext selections should extend to the full width of the document. |
QStyle::SH_GroupBox_TextLabelVerticalAlignment | ? | How to vertically align a group box’s text label. |
QStyle::SH_GroupBox_TextLabelColor | ? | How to paint a group box’s text label. |
QStyle::SH_DialogButtons_DefaultButton | ? | Which button gets the default status in a dialog’s button widget. |
QStyle::SH_ToolBox_SelectedPageTitleBold | ? | Boldness of the selected page title in a QToolBox. |
QStyle::SH_LineEdit_PasswordCharacter | ? | The Unicode character to be used for passwords. |
QStyle::SH_LineEdit_PasswordMaskDelay | ? | Determines the delay before visible character is masked with password character, in milliseconds. This enum value was added in Qt 5.4. |
QStyle::SH_Table_GridLineColor | ? | The RGB value of the grid for a table. |
QStyle::SH_UnderlineShortcut | ? | Whether shortcuts are underlined. |
QStyle::SH_SpellCheckUnderlineStyle | ? | Obsolete. Use SpellCheckUnderlineStyle hint in QPlatformTheme instead. |
QStyle::SH_SpinBox_AnimateButton | ? | Animate a click when up or down is pressed in a spin box. |
QStyle::SH_SpinBox_KeyPressAutoRepeatRate | ? | Auto-repeat interval for spinbox key presses. |
QStyle::SH_SpinBox_ClickAutoRepeatRate | ? | Auto-repeat interval for spinbox mouse clicks. |
QStyle::SH_SpinBox_ClickAutoRepeatThreshold | ? | Auto-repeat threshold for spinbox mouse clicks. |
QStyle::SH_ToolTipLabel_Opacity | ? | An integer indicating the opacity for the tip label, 0 is completely transparent, 255 is completely opaque. |
QStyle::SH_DrawMenuBarSeparator | ? | Indicates whether or not the menu bar draws separators. |
QStyle::SH_TitleBar_ModifyNotification | ? | Indicates if the title bar should show a ‘*’ for windows that are modified. |
QStyle::SH_Button_FocusPolicy | ? | The default focus policy for buttons. |
QStyle::SH_CustomBase | 0xf0000000 | Base value for custom style hints. Custom values must be greater than this value. |
QStyle::SH_MessageBox_UseBorderForButtonSpacing | ? | A boolean indicating what the to use the border of the buttons (computed as half the button height) for the spacing of the button in a message box. |
QStyle::SH_MessageBox_CenterButtons | ? | A boolean indicating whether the buttons in the message box should be centered or not (see QDialogButtonBox::setCentered()). |
QStyle::SH_MessageBox_TextInteractionFlags | ? | A boolean indicating if the text in a message box should allow user interfactions (e.g. selection) or not. |
QStyle::SH_TitleBar_AutoRaise | ? | A boolean indicating whether controls on a title bar ought to update when the mouse is over them. |
QStyle::SH_ToolButton_PopupDelay | ? | An int indicating the popup delay in milliseconds for menus attached to tool buttons. |
QStyle::SH_FocusFrame_Mask | ? | The mask of the focus frame. |
QStyle::SH_RubberBand_Mask | ? | The mask of the rubber band. |
QStyle::SH_WindowFrame_Mask | ? | The mask of the window frame. |
QStyle::SH_SpinControls_DisableOnBounds | ? | Determines if the spin controls will shown as disabled when reaching the spin range boundary. |
QStyle::SH_Dial_BackgroundRole | ? | Defines the style’s preferred background role (as QPalette::ColorRole) for a dial widget. |
QStyle::SH_ComboBox_LayoutDirection | ? | The layout direction for the combo box. By default it should be the same as indicated by the QStyleOption::direction variable. |
QStyle::SH_ItemView_EllipsisLocation | ? | The location where ellipses should be added for item text that is too long to fit in an view item. |
QStyle::SH_ItemView_ShowDecorationSelected | ? | When an item in an item view is selected, also highlight the branch or other decoration. |
QStyle::SH_ItemView_ActivateItemOnSingleClick | ? | Emit the activated signal when the user single clicks on an item in an item in an item view. Otherwise the signal is emitted when the user double clicks on an item. |
QStyle::SH_Slider_AbsoluteSetButtons | ? | Which mouse buttons cause a slider to set the value to the position clicked on. |
QStyle::SH_Slider_PageSetButtons | ? | Which mouse buttons cause a slider to page step the value. |
QStyle::SH_TabBar_ElideMode | ? | The default eliding style for a tab bar. |
QStyle::SH_DialogButtonLayout | ? | Controls how buttons are laid out in a QDialogButtonBox, returns a QDialogButtonBox::ButtonLayout enum. |
QStyle::SH_WizardStyle | ? | Controls the look and feel of a QWizard. Returns a QWizard::WizardStyle enum. |
QStyle::SH_FormLayoutWrapPolicy | ? | Provides a default for how rows are wrapped in a QFormLayout. Returns a QFormLayout::RowWrapPolicy enum. |
QStyle::SH_FormLayoutFieldGrowthPolicy | ? | Provides a default for how fields can grow in a QFormLayout. Returns a QFormLayout::FieldGrowthPolicy enum. |
QStyle::SH_FormLayoutFormAlignment | ? | Provides a default for how a QFormLayout aligns its contents within the available space. Returns a Qt::Alignment enum. |
QStyle::SH_FormLayoutLabelAlignment | ? | Provides a default for how a QFormLayout aligns labels within the available space. Returns a Qt::Alignment enum. |
QStyle::SH_ItemView_ArrowKeysNavigateIntoChildren | ? | Controls whether the tree view will select the first child when it is exapanded and the right arrow key is pressed. |
QStyle::SH_ComboBox_PopupFrameStyle | ? | The frame style used when drawing a combobox popup menu. |
QStyle::SH_DialogButtonBox_ButtonsHaveIcons | ? | Indicates whether or not StandardButtons in QDialogButtonBox should have icons or not. |
QStyle::SH_ItemView_MovementWithoutUpdatingSelection | ? | The item view is able to indicate a current item without changing the selection. |
QStyle::SH_ToolTip_Mask | ? | The mask of a tool tip. |
QStyle::SH_FocusFrame_AboveWidget | ? | The FocusFrame is stacked above the widget that it is “focusing on”. |
QStyle::SH_TextControl_FocusIndicatorTextCharFormat | ? | Specifies the text format used to highlight focused anchors in rich text documents displayed for example in QTextBrowser. The format has to be a QTextCharFormat returned in the variant of the QStyleHintReturnVariant return value. The QTextFormat::OutlinePen property is used for the outline and QTextFormat::BackgroundBrush for the background of the highlighted area. |
QStyle::SH_Menu_FlashTriggeredItem | ? | Flash triggered item. |
QStyle::SH_Menu_FadeOutOnHide | ? | Fade out the menu instead of hiding it immediately. |
QStyle::SH_TabWidget_DefaultTabPosition | ? | Default position of the tab bar in a tab widget. |
QStyle::SH_ToolBar_Movable | ? | Determines if the tool bar is movable by default. |
QStyle::SH_ItemView_PaintAlternatingRowColorsForEmptyArea | ? | Whether QTreeView paints alternating row colors for the area that does not have any items. |
QStyle::SH_Menu_Mask | ? | The mask for a popup menu. |
QStyle::SH_ItemView_DrawDelegateFrame | ? | Determines if there should be a frame for a delegate widget. |
QStyle::SH_TabBar_CloseButtonPosition | ? | Determines the position of the close button on a tab in a tab bar. |
QStyle::SH_DockWidget_ButtonsHaveFrame | ? | Determines if dockwidget buttons should have frames. Default is true. |
QStyle::SH_ToolButtonStyle | ? | Determines the default system style for tool buttons that uses Qt::ToolButtonFollowStyle. |
QStyle::SH_RequestSoftwareInputPanel | ? | Determines when a software input panel should be requested by input widgets. Returns an enum of type QStyle::RequestSoftwareInputPanel. |
QStyle::SH_ScrollBar_Transient | ? | Determines if the style supports transient scroll bars. Transient scroll bars appear when the content is scrolled and disappear when they are no longer needed. |
QStyle::SH_Menu_SupportsSections | ? | Determines if the style displays sections in menus or treat them as plain separators. Sections are separators with a text and icon hint. |
QStyle::SH_ToolTip_WakeUpDelay | ? | Determines the delay before a tooltip is shown, in milliseconds. |
QStyle::SH_ToolTip_FallAsleepDelay | ? | Determines the delay (in milliseconds) before a new wake time is needed when a tooltip is shown (notice: shown, not hidden). When a new wake isn’t needed, a user-requested tooltip will be shown nearly instantly. |
QStyle::SH_Widget_Animate | ? | Deprecated. Use SH_Widget_Animation_Duration instead. |
QStyle::SH_Splitter_OpaqueResize | ? | Determines if resizing is opaque This enum value has been introduced in Qt 5.2 |
QStyle::SH_TabBar_ChangeCurrentDelay | ? | Determines the delay before the current tab is changed while dragging over the tabbar, in milliseconds. This enum value has been introduced in Qt 5.4 |
QStyle::SH_ItemView_ScrollMode | ? | The default vertical and horizontal scroll mode as specified by the style. Can be overridden with QAbstractItemView::setVerticalScrollMode() and QAbstractItemView::setHorizontalScrollMode(). This enum value has been introduced in Qt 5.7. |
QStyle::SH_TitleBar_ShowToolTipsOnButtons | ? | Determines if tool tips are shown on window title bar buttons. The Mac style, for example, sets this to false. This enum value has been introduced in Qt 5.10. |
QStyle::SH_Widget_Animation_Duration | ? | Determines how much an animation should last (in ms). A value equal to zero means that the animations will be disabled. This enum value has been introduced in Qt 5.10. |
QStyle::SubControl
flags QStyle::SubControls
此枚举描述了可用的子控件。 子控件是复杂控件(ComplexControl)中的控件元素。
Constant | Value | Description |
---|---|---|
QStyle::SC_None | 0x00000000 | Special value that matches no other sub control. |
QStyle::SC_ScrollBarAddLine | 0x00000001 | Scroll bar add line (i.e., down/right arrow); see also QScrollBar. |
QStyle::SC_ScrollBarSubLine | 0x00000002 | Scroll bar sub line (i.e., up/left arrow). |
QStyle::SC_ScrollBarAddPage | 0x00000004 | Scroll bar add page (i.e., page down). |
QStyle::SC_ScrollBarSubPage | 0x00000008 | Scroll bar sub page (i.e., page up). |
QStyle::SC_ScrollBarFirst | 0x00000010 | Scroll bar first line (i.e., home). |
QStyle::SC_ScrollBarLast | 0x00000020 | Scroll bar last line (i.e., end). |
QStyle::SC_ScrollBarSlider | 0x00000040 | Scroll bar slider handle. |
QStyle::SC_ScrollBarGroove | 0x00000080 | Special sub-control which contains the area in which the slider handle may move. |
QStyle::SC_SpinBoxUp | 0x00000001 | Spin widget up/increase; see also QSpinBox. |
QStyle::SC_SpinBoxDown | 0x00000002 | Spin widget down/decrease. |
QStyle::SC_SpinBoxFrame | 0x00000004 | Spin widget frame. |
QStyle::SC_SpinBoxEditField | 0x00000008 | Spin widget edit field. |
QStyle::SC_ComboBoxEditField | 0x00000002 | Combobox edit field; see also QComboBox. |
QStyle::SC_ComboBoxArrow | 0x00000004 | Combobox arrow button. |
QStyle::SC_ComboBoxFrame | 0x00000001 | Combobox frame. |
QStyle::SC_ComboBoxListBoxPopup | 0x00000008 | The reference rectangle for the combobox popup. Used to calculate the position of the popup. |
QStyle::SC_SliderGroove | 0x00000001 | Special sub-control which contains the area in which the slider handle may move. |
QStyle::SC_SliderHandle | 0x00000002 | Slider handle. |
QStyle::SC_SliderTickmarks | 0x00000004 | Slider tickmarks. |
QStyle::SC_ToolButton | 0x00000001 | Tool button (see also QToolButton). |
QStyle::SC_ToolButtonMenu | 0x00000002 | Sub-control for opening a popup menu in a tool button. |
QStyle::SC_TitleBarSysMenu | 0x00000001 | System menu button (i.e., restore, close, etc.). |
QStyle::SC_TitleBarMinButton | 0x00000002 | Minimize button. |
QStyle::SC_TitleBarMaxButton | 0x00000004 | Maximize button. |
QStyle::SC_TitleBarCloseButton | 0x00000008 | Close button. |
QStyle::SC_TitleBarLabel | 0x00000100 | Window title label. |
QStyle::SC_TitleBarNormalButton | 0x00000010 | Normal (restore) button. |
QStyle::SC_TitleBarShadeButton | 0x00000020 | Shade button. |
QStyle::SC_TitleBarUnshadeButton | 0x00000040 | Unshade button. |
QStyle::SC_TitleBarContextHelpButton | 0x00000080 | Context Help button. |
QStyle::SC_DialHandle | 0x00000002 | The handle of the dial (i.e. what you use to control the dial). |
QStyle::SC_DialGroove | 0x00000001 | The groove for the dial. |
QStyle::SC_DialTickmarks | 0x00000004 | The tickmarks for the dial. |
QStyle::SC_GroupBoxFrame | 0x00000008 | The frame of a group box. |
QStyle::SC_GroupBoxLabel | 0x00000002 | The title of a group box. |
QStyle::SC_GroupBoxCheckBox | 0x00000001 | The optional check box of a group box. |
QStyle::SC_GroupBoxContents | 0x00000004 | The group box contents. |
QStyle::SC_MdiNormalButton | 0x00000002 | The normal button for a MDI subwindow in the menu bar. |
QStyle::SC_MdiMinButton | 0x00000001 | The minimize button for a MDI subwindow in the menu bar. |
QStyle::SC_MdiCloseButton | 0x00000004 | The close button for a MDI subwindow in the menu bar. |
QStyle::SC_All | 0xffffffff | Special value that matches all sub-controls. |
SubControls类型是QFlags 的typedef。 它存储SubControl值的OR组合。
QStyle::SubElement
此枚举表示窗口小部件的子区域。 样式实现使用这些区域来绘制窗口小部件的不同部分。
Constant | Value | Description |
---|---|---|
QStyle::SE_PushButtonContents | 0 | Area containing the label (icon with text or pixmap). |
QStyle::SE_PushButtonFocusRect | 1 | Area for the focus rect (usually larger than the contents rect). |
QStyle::SE_PushButtonLayoutItem | ? | Area that counts for the parent layout. |
QStyle::SE_CheckBoxIndicator | 2 | Area for the state indicator (e.g., check mark). |
QStyle::SE_CheckBoxContents | 3 | Area for the label (text or pixmap). |
QStyle::SE_CheckBoxFocusRect | 4 | Area for the focus indicator. |
QStyle::SE_CheckBoxClickRect | 5 | Clickable area, defaults to SE_CheckBoxFocusRect. |
QStyle::SE_CheckBoxLayoutItem | ? | Area that counts for the parent layout. |
QStyle::SE_DateTimeEditLayoutItem | ? | Area that counts for the parent layout. |
QStyle::SE_RadioButtonIndicator | 6 | Area for the state indicator. |
QStyle::SE_RadioButtonContents | 7 | Area for the label. |
QStyle::SE_RadioButtonFocusRect | 8 | Area for the focus indicator. |
QStyle::SE_RadioButtonClickRect | 9 | Clickable area, defaults to SE_RadioButtonFocusRect. |
QStyle::SE_RadioButtonLayoutItem | ? | Area that counts for the parent layout. |
QStyle::SE_ComboBoxFocusRect | 10 | Area for the focus indicator. |
QStyle::SE_SliderFocusRect | 11 | Area for the focus indicator. |
QStyle::SE_SliderLayoutItem | ? | Area that counts for the parent layout. |
QStyle::SE_SpinBoxLayoutItem | ? | Area that counts for the parent layout. |
QStyle::SE_ProgressBarGroove | 12 | Area for the groove. |
QStyle::SE_ProgressBarContents | 13 | Area for the progress indicator. |
QStyle::SE_ProgressBarLabel | 14 | Area for the text label. |
QStyle::SE_ProgressBarLayoutItem | ? | Area that counts for the parent layout. |
QStyle::SE_FrameContents | ? | Area for a frame’s contents. |
QStyle::SE_ShapedFrameContents | ? | Area for a frame’s contents using the shape in QStyleOptionFrame; see QFrame |
QStyle::SE_FrameLayoutItem | ? | Area that counts for the parent layout. |
QStyle::SE_HeaderArrow | 17 | Area for the sort indicator for a header. |
QStyle::SE_HeaderLabel | 16 | Area for the label in a header. |
QStyle::SE_LabelLayoutItem | ? | Area that counts for the parent layout. |
QStyle::SE_LineEditContents | ? | Area for a line edit’s contents. |
QStyle::SE_TabWidgetLeftCorner | 21 | Area for the left corner widget in a tab widget. |
QStyle::SE_TabWidgetRightCorner | 22 | Area for the right corner widget in a tab widget. |
QStyle::SE_TabWidgetTabBar | 18 | Area for the tab bar widget in a tab widget. |
QStyle::SE_TabWidgetTabContents | 20 | Area for the contents of the tab widget. |
QStyle::SE_TabWidgetTabPane | 19 | Area for the pane of a tab widget. |
QStyle::SE_TabWidgetLayoutItem | ? | Area that counts for the parent layout. |
QStyle::SE_ToolBoxTabContents | 15 | Area for a toolbox tab’s icon and label. |
QStyle::SE_ToolButtonLayoutItem | ? | Area that counts for the parent layout. |
QStyle::SE_ItemViewItemCheckIndicator | SE_ViewItemCheckIndicator | Area for a view item’s check mark. |
QStyle::SE_TabBarTearIndicator | ? | Deprecated. Use SE_TabBarTearIndicatorLeft instead. |
QStyle::SE_TabBarTearIndicatorLeft | SE_TabBarTearIndicator | Area for the tear indicator on the left side of a tab bar with scroll arrows. |
QStyle::SE_TabBarTearIndicatorRight | ? | Area for the tear indicator on the right side of a tab bar with scroll arrows. |
QStyle::SE_TabBarScrollLeftButton | ? | Area for the scroll left button on a tab bar with scroll buttons. |
QStyle::SE_TabBarScrollRightButton | ? | Area for the scroll right button on a tab bar with scroll buttons. |
QStyle::SE_TreeViewDisclosureItem | ? | Area for the actual disclosure item in a tree branch. |
QStyle::SE_DialogButtonBoxLayoutItem | ? | Area that counts for the parent layout. |
QStyle::SE_GroupBoxLayoutItem | ? | Area that counts for the parent layout. |
QStyle::SE_CustomBase | 0xf0000000 | Base value for custom sub-elements. Custom values must be greater than this value. |
QStyle::SE_DockWidgetFloatButton | ? | The float button of a dock widget. |
QStyle::SE_DockWidgetTitleBarText | ? | The text bounds of the dock widgets title. |
QStyle::SE_DockWidgetCloseButton | ? | The close button of a dock widget. |
QStyle::SE_DockWidgetIcon | ? | The icon of a dock widget. |
QStyle::SE_ComboBoxLayoutItem | ? | Area that counts for the parent layout. |
QStyle::SE_ItemViewItemDecoration | ? | Area for a view item’s decoration (icon). |
QStyle::SE_ItemViewItemText | ? | Area for a view item’s text. |
QStyle::SE_ItemViewItemFocusRect | ? | Area for a view item’s focus rect. |
QStyle::SE_TabBarTabLeftButton | ? | Area for a widget on the left side of a tab in a tab bar. |
QStyle::SE_TabBarTabRightButton | ? | Area for a widget on the right side of a tab in a tab bar. |
QStyle::SE_TabBarTabText | ? | Area for the text on a tab in a tab bar. |
QStyle::SE_ToolBarHandle | ? | Area for the handle of a tool bar. |
成员函数文档
drawComplexControl
[pure virtual] void QStyle::drawComplexControl(ComplexControl control, const QStyleOptionComplex *option,QPainter *painter, const QWidget *widget = Q_NULLPTR) const
使用提供的painter使用指定的样式选项绘制控件。
widget参数是可选的,可用作绘制控件的辅助工具。
option
参数是一个指向QStyleOptionComplex
对象的指针,可以使用qstyleoption_cast()
函数将其强制转换为正确的子类。请注意,指定选项的rect成员必须位于逻辑坐标中。 重新实现此函数应使用visualRect()
在调用drawPrimitive()
或drawControl()
函数之前将逻辑坐标更改为屏幕坐标。
下表列出了复杂的控件元素及其关联的样式选项子类。 样式选项包含绘制控件所需的所有参数,包括QStyleOption::state
,其中包含绘制时使用的样式标志。 该表还描述了在将给定选项强制转换为适当的子类时设置的标志。
Complex Control | QStyleOptionComplex Subclass | Style Flag | Remark |
---|---|---|---|
CC_SpinBox | QStyleOptionSpinBox | State_Enabled | Set if the spin box is enabled. |
State_HasFocus | Set if the spin box has input focus. | ||
CC_ComboBox | QStyleOptionComboBox | State_Enabled | Set if the combobox is enabled. |
State_HasFocus | Set if the combobox has input focus. | ||
CC_ScrollBar | QStyleOptionSlider | State_Enabled | Set if the scroll bar is enabled. |
State_HasFocus | Set if the scroll bar has input focus. | ||
CC_Slider | QStyleOptionSlider | State_Enabled | Set if the slider is enabled. |
State_HasFocus | Set if the slider has input focus. | ||
CC_Dial | QStyleOptionSlider | State_Enabled | Set if the dial is enabled. |
State_HasFocus | Set if the dial has input focus. | ||
CC_ToolButton | QStyleOptionToolButton | State_Enabled | Set if the tool button is enabled. |
State_HasFocus | Set if the tool button has input focus. | ||
State_DownArrow | Set if the tool button is down (i.e., a mouse button or the space bar is pressed). | ||
State_On | Set if the tool button is a toggle button and is toggled on. | ||
State_AutoRaise | Set if the tool button has auto-raise enabled. | ||
State_Raised | Set if the button is not down, not on, and doesn’t contain the mouse when auto-raise is enabled. | ||
CC_TitleBar | QStyleOptionTitleBar | State_Enabled | Set if the title bar is enabled. |
drawControl
[pure virtual] void QStyle::drawControl(ControlElement element, const QStyleOption *option,QPainter *painter, const QWidget *widget = Q_NULLPTR) const
painter使用指定的样式选项绘制给定元素。
widget参数是可选的,可用作绘制控件的辅助工具。 option参数是一个指向QStyleOption
对象的指针,可以使用qstyleoption_cast()
函数将其强制转换为正确的子类。
下表列出了控件元素及其关联的样式选项子类。样式选项包含绘制控件所需的所有参数,包括QStyleOption::state
,其中包含绘制时使用的样式标志。 该表还描述了在将给定选项强制转换为适当的子类时设置的标志。
请注意,如果此处未列出控件元素,那是因为它使用普通的QStyleOption
对象。
Control Element | QStyleOption Subclass | Style Flag | Remark |
---|---|---|---|
CE_MenuItem, CE_MenuBarItem | QStyleOptionMenuItem | State_Selected | The menu item is currently selected item. |
State_Enabled | The item is enabled. | ||
State_DownArrow | Indicates that a scroll down arrow should be drawn. | ||
State_UpArrow | Indicates that a scroll up arrow should be drawn | ||
State_HasFocus | Set if the menu bar has input focus. | ||
CE_PushButton, CE_PushButtonBevel, CE_PushButtonLabel | QStyleOptionButton | State_Enabled | Set if the button is enabled. |
State_HasFocus | Set if the button has input focus. | ||
State_Raised | Set if the button is not down, not on and not flat. | ||
State_On | Set if the button is a toggle button and is toggled on. | ||
State_Sunken | Set if the button is down (i.e., the mouse button or the space bar is pressed on the button). | ||
CE_RadioButton, CE_RadioButtonLabel, CE_CheckBox, CE_CheckBoxLabel | QStyleOptionButton | State_Enabled | Set if the button is enabled. |
State_HasFocus | Set if the button has input focus. | ||
State_On | Set if the button is checked. | ||
State_Off | Set if the button is not checked. | ||
State_NoChange | Set if the button is in the NoChange state. | ||
State_Sunken | Set if the button is down (i.e., the mouse button or the space bar is pressed on the button). | ||
CE_ProgressBarContents, CE_ProgressBarLabel, CE_ProgressBarGroove | QStyleOptionProgressBar | State_Enabled | Set if the progress bar is enabled. |
State_HasFocus | Set if the progress bar has input focus. | ||
CE_Header, CE_HeaderSection, CE_HeaderLabel | QStyleOptionHeader | ||
CE_TabBarTab, CE_TabBarTabShape, CE_TabBarTabLabel | QStyleOptionTab | State_Enabled | Set if the tab bar is enabled. |
State_Selected | The tab bar is the currently selected tab bar. | ||
State_HasFocus | Set if the tab bar tab has input focus. | ||
CE_ToolButtonLabel | QStyleOptionToolButton | State_Enabled | Set if the tool button is enabled. |
State_HasFocus | Set if the tool button has input focus. | ||
State_Sunken | Set if the tool button is down (i.e., a mouse button or the space bar is pressed). | ||
State_On | Set if the tool button is a toggle button and is toggled on. | ||
State_AutoRaise | Set if the tool button has auto-raise enabled. | ||
State_MouseOver | Set if the mouse pointer is over the tool button. | ||
State_Raised | Set if the button is not down and is not on. | ||
CE_ToolBoxTab | QStyleOptionToolBox | State_Selected | The tab is the currently selected tab. |
CE_HeaderSection | QStyleOptionHeader | State_Sunken | Indicates that the section is pressed. |
State_UpArrow | Indicates that the sort indicator should be pointing up. | ||
State_DownArrow | Indicates that the sort indicator should be pointing down. |
drawItemPixmap
[virtual] void QStyle::drawItemPixmap(QPainter *painter, const QRect &rectangle, int alignment, const QPixmap &pixmap) const
使用提供的painter,根据指定的alignment,在指定的矩形中绘制给定的像素图。
drawItemText
[virtual] void QStyle::drawItemText(QPainter *painter, const QRect &rectangle, int alignment, const QPalette &palette, bool enabled, const QString &text, QPalette::ColorRole textRole = QPalette::NoRole) const
使用提供的painter和palette在指定的矩形中绘制给定文本。
使用painter绘制文本,并根据指定的对齐方式对齐。 如果指定了显式textRole
,则使用给定角色的调色板颜色绘制文本。 enabled参数指示项目是否已启用; 重新实现此功能时,启用的参数会影响项目的绘制方式。
drawPrimitive
[pure virtual] void QStyle::drawPrimitive(PrimitiveElement element, const QStyleOption *option,QPainter *painter, const QWidget *widget = Q_NULLPTR) const
painter使用指定的样式选项绘制给的基础元素。
小部件参数是可选的,可以包含可以帮助绘制基础元素的小部件。
下表列出了原始元素及其关联的样式选项子类。 样式选项包含绘制元素所需的所有参数,包括QStyleOption::state
,其中包含绘制时使用的样式标志。 该表还描述了在将给定选项强制转换为适当的子类时设置的标志。
请注意,如果此处未列出原始元素,那是因为它使用普通的QStyleOption
对象。
Primitive Element | QStyleOption Subclass | Style Flag | Remark |
---|---|---|---|
PE_FrameFocusRect | QStyleOptionFocusRect | State_FocusAtBorder | Whether the focus is is at the border or inside the widget. |
PE_IndicatorCheckBox | QStyleOptionButton | State_NoChange | Indicates a “tri-state” checkbox. |
State_On | Indicates the indicator is checked. | ||
PE_IndicatorRadioButton | QStyleOptionButton | State_On | Indicates that a radio button is selected. |
State_NoChange | Indicates a “tri-state” controller. | ||
State_Enabled | Indicates the controller is enabled. | ||
PE_IndicatorBranch | QStyleOption | State_Children | Indicates that the control for expanding the tree to show child items, should be drawn. |
State_Item | Indicates that a horizontal branch (to show a child item), should be drawn. | ||
State_Open | Indicates that the tree branch is expanded. | ||
State_Sibling | Indicates that a vertical line (to show a sibling item), should be drawn. | ||
PE_IndicatorHeaderArrow | QStyleOptionHeader | State_UpArrow | Indicates that the arrow should be drawn up; otherwise it should be down. |
PE_FrameGroupBox, PE_Frame, PE_FrameLineEdit, PE_FrameMenu, PE_FrameDockWidget, PE_FrameWindow | QStyleOptionFrame | State_Sunken | Indicates that the Frame should be sunken. |
PE_IndicatorToolBarHandle | QStyleOption | State_Horizontal | Indicates that the window handle is horizontal instead of vertical. |
PE_IndicatorSpinPlus, PE_IndicatorSpinMinus, PE_IndicatorSpinUp, PE_IndicatorSpinDown, | QStyleOptionSpinBox | State_Sunken | Indicates that the button is pressed. |
PE_PanelButtonCommand | QStyleOptionButton | State_Enabled | Set if the button is enabled. |
State_HasFocus | Set if the button has input focus. | ||
State_Raised | Set if the button is not down, not on and not flat. | ||
State_On | Set if the button is a toggle button and is toggled on. | ||
State_Sunken | Set if the button is down (i.e., the mouse button or the space bar is pressed on the button). |
pixelMetric
[pure virtual] int QStyle::pixelMetric(PixelMetric metric, const QStyleOption *option = Q_NULLPTR, const QWidget *widget = Q_NULLPTR) const
返回给定像素度量的值。
指定的选项和窗口小部件可用于计算度量标准。 通常,不使用widget参数。 可以使用qstyleoption_cast()
函数将该选项强制转换为适当的类型。 请注意,即使可以使用它的PixelMetrics,该选项也可能为零。 请参阅下表以了解相应的选项转换:
sizeFromContents
[pure virtual]QSize QStyle::sizeFromContents(ContentsType type, const QStyleOption *option, const QSize &contentsSize, const QWidget *widget = Q_NULLPTR) const
根据提供的contentsSize返回指定选项和类型描述的元素的大小。
option参数是指向QStyleOption
或其子类之一的指针。 可以使用qstyleoption_cast()
函数将该选项强制转换为适当的类型。 窗口小部件是可选参数,可以包含用于计算大小的额外信息。
请参阅下表以了解相应的选项转换:
subElementRect
[pure virtual] QRect QStyle::subElementRect(SubElement element, const QStyleOption *option, const QWidget *widget = Q_NULLPTR) const
返回给定元素的子区域,如提供的样式选项中所述。 返回的矩形在屏幕坐标中定义。
小部件参数是可选的,可用于帮助确定区域。 可以使用qstyleoption_cast()
函数将QStyleOption
对象强制转换为适当的类型。 请参阅下表以了解相应的选项转换:
动态改变样式(QSS)
polish
[virtual] void QStyle::polish(QWidget *widget)
初始化给定小部件的外观。
每个小部件在完全创建之后但在它第一次显示之前的某个时刻调用此函数。
请注意,默认实现不执行任何操作。此函数中的合理操作可能是为窗口小部件调用QWidget::setBackgroundMode()
函数。 不要使用该功能来设置例如几何体。 重新实现此功能提供了一个后门,通过它可以更改窗口小部件的外观,但使用Qt的样式引擎,很少需要实现此功能; 相反,重新实现drawItemPixmap()
,drawItemText()
,drawPrimitive()
等。
QWidget::inherits()
函数可以提供足够的信息以允许特定于类的自定义。 但是,由于新的QStyle子类有望与所有当前和未来的小部件合理地工作,因此建议使用硬编码的自定义。
[virtual] void QStyle::polish(QApplication *application)
给应用程序对象初始化样式。
[virtual] void QStyle::polish(QPalette &palette)
根据调色板的样式要求,更改调色板。
unpolish
[virtual] void QStyle::unpolish(QWidget *widget)
取消小部件的样式。
此函数与polish()
相对应。 每当动态改变样式时,都会为每个已经生效样式的小部件调用它; 之前的风格必须在新样式再次生效之前取消其设置。
请注意,只有在窗口小部件被销毁时才会调用unpolish()
。 在某些情况下,这可能会导致问题,例如,如果从UI中删除窗口小部件,将其缓存,然后在样式更改后重新插入; 一些Qt的类缓存它们的小部件。
[virtual] void QStyle::unpolish(QApplication *application)
取消应用程序样式
实例
QSS样式
QLineEdit[change=true] {
color: red;
}
动态设置QSS
lineEdit->setProperty("change", true);
lineEdit->style()->unpolish(lineEdit);
lineEdit->style()->polish(lineEdit);
QCommonStyle class
QCommonStyle
类封装了GUI的常见外观。
这个抽象类实现了一些小部件的外观,这是所有GUI样式所共有的,这些样式是作为Qt的一部分提供的。
由于QCommonStyle
继承了QStyle
,因此其所有功能都在QStyle
文档中完整记录。
QProxyStyle class
QProxyStyle类是一个简便的类,可以简化QStyle元素。
QProxyStyle包装QStyle(通常是默认的系统样式),用于动态绘制或其他特定样式行为。
以下示例显示如何在任何平台上重写快捷方式下划线行为:
#include "textedit.h"
#include <QApplication>
#include <QProxyStyle>
class MyProxyStyle : public QProxyStyle
{
public:
int styleHint(StyleHint hint, const QStyleOption *option = 0,const QWidget *widget = 0, QStyleHintReturn *returnData = 0) const
{
if (hint == QStyle::SH_UnderlineShortcut)
return 0;
return QProxyStyle::styleHint(hint, option, widget, returnData);
}
};
int main(int argc, char **argv)
{
Q_INIT_RESOURCE(textedit);
QApplication a(argc, argv);
a.setStyle(new MyProxyStyle);
TextEdit mw;
mw.resize(700, 800);
mw.show();
//...
}
警告:Qt提供的常用样式将关注此提示,因为它们调用QStyle::proxy()
,但不保证将为用户定义或系统控制的样式调用QStyle::proxy()
。 例如,在操作系统处理菜单的情况下,它无法在Mac上运行。