查找Java容器或Matlab GUI句柄中包含的所有Java对象
Find all java objects contained within a java container or Matlab GUI handle
如果没有指定输出参数，那么将显示一个交互式GUI窗口，其中包含所有容器组件、属性和回调的树视图。
If no output parameter is specified, then an interactive GUI window will be displayed with a tree-view of all container components, their properties and callbacks.
本函数的使用语法：
[handles,levels,parentIds,listing] = findjobj(container,‘PropName’,PropValue(s),…)
输入：
Inputs:
-
container：可选的GUI句柄，如果没有指定，则使用当前图形界面。
-
container - optional GUI handle. If unsupplied then current figure will be used
-
‘PropName’,PropValue：不区分大小写属性对的可选列表。
-
‘PropName’,PropValue - optional list of case insensitive property pairs. PropName may also be named -PropName.
Supported properties:
- ‘position’ - filter results based on those elements that contain the specified X,Y position or a java element
Note: specify a Matlab position (X,Y = pixels from bottom left corner), not a java one
-
‘size’ - filter results based on those elements that have the specified W,H (in pixels)
-
‘class’ - filter results based on those elements that contain the substring (or java class) PropValue
Note: filtering is case insensitive and relies on regexp, so you can pass wildcards etc.
-
‘property’ - filter results based on elements that possess the specified case-insensitive property string or have property values in cell array format: {‘propName’, ‘propValue’}. Example: findjobj(…,‘property’, {‘Text’,‘click me’})
-
‘depth’ - filter results based on specified depth. 0=top-level, Inf=all levels (default=Inf)
-
‘flat’ - same as: ‘depth’,0
-
‘not’ - negates the following filter: ‘not’,‘class’,‘c’ returns all elements EXCEPT those with class ‘c’
-
‘persist’ - persist figure components information, allowing much faster results for subsequent invocations
-
‘print’ - display all java elements in a hierarchical list
Note1: optional PropValue of element index or handle to java container
Note2: normally this option would be placed last, after all filtering is complete.
- ‘list’ - same as ‘print’
输出：
Outputs:
-
handles：Java元素句柄列表
-
handles - list of handles to java elements
-
levels：Java元素的对应层次结构列表（top＝0）
-
levels - list of corresponding hierarchy level of the java elements (top=0)
-
parentIds：对应Java元素父容器的索引列表（未经过滤的句柄）
-
parentIds - list of indexes (in unfiltered handles) of the parent container of the corresponding java element
-
listing：“print”/“list”选项的结果（如果未指定“print”/“list”，则为空）
-
listing - results of ‘print’/‘list’ options (empty if ‘print’/‘list’ were unspecified)
使用举例：
hButton = uicontrol(‘string’,‘click me’);
jButton = findjobj(hButton,‘nomenu’); % or: jButton = findjobj(‘property’,{‘Text’,‘click me’});
jButton.setFlyOverAppearance(1);
jButton.setCursor(java.awt.Cursor.getPredefinedCursor(java.awt.Cursor.HAND_CURSOR));
set(jButton,‘FocusGainedCallback’,@myMatlabFunction); % some 30 callback points available…
jButton.get; % list all changeable properties…
hEditbox = uicontrol(‘style’,edit’);
jEditbox = findjobj(hEditbox,‘nomenu’);
jEditbox.setCaretColor(java.awt.Color.red);
jEditbox.KeyTypedCallback = @myCallbackFunc; % many more callbacks where this came from…
jEdit.requestFocus;
(Many more examples in the utility’s help section)
需要注意的问题：
无法处理多个容器对象，一次只能处理一个
- Cannot currently process multiple container objects - just one at a time
当图形中包含许多UI组件时，初始处理速度会稍慢（因此最好使用“persist”）
- Initial processing is a bit slow when the figure is laden with many UI components (so better use ‘persist’)
目前按照位置+大小查找传递容器的Ｍatlab句柄：应该可以找到更好的方法来实现
- Passing a container Matlab handle is currently found by position+size: should find a better way to do this
标签在Java中只有一个只写文本属性，所以不能使用“属性”、“文本”、“字符串”来表示
- Labels have a write-only text property in java, so can’t be found using ‘property’,{‘Text’,‘string’} notation
参考技术文档的相关网页：
- https://UndocumentedMatlab.com/blog/findjobj-find-underlying-java-object
- https://UndocumentedMatlab.com/blog/findjobj-gui-display-container-hierarchy
完整源码下载地址：
http://page2.dfpan.com/fs/6lcj4221229156d8d92/
更多精彩文章请关注微信号：