QMenu实现URL记忆功能

单例类记忆URL:

头文件：

QQueue<QString> m_urlQueue;

void AddQueueItem(const QString &string);
QQueue<QString> getQueueInfo();

源文件：

void   GlobalData::AddQueueItem(const QString &string) {
   if (string.length() < 5) {
       return;
   }

   if (m_urlQueue.size() >= 5) {//最多记忆5条
       m_urlQueue.dequeue();
   }
   for (int i = 0; i < m_urlQueue.size(); i++) {
       if (m_urlQueue.at(i) == string) {
           return;
       }
   }
   m_urlQueue.enqueue(string);
}
QQueue<QString> GlobalData::getQueueInfo() {
   return m_urlQueue;
}

显示对话框：

头文件：

UrlLineEdit *m_urlEdt;

MyTrayMenu *m_urlMenu;

    QWidget *contentUrlWidget[5];
   QLabel *contentUrlLabel[5];
   QWidgetAction *contentAction[5];

QQueue<QString> m_tmpQueue;
int m_lastSame;

public slots:

    void onShowMenu();
   void onHideMenu();
   void onChangeUrlMenu(QAction *action);
   void onTextChanged(const QString &string);

源文件：

构造函数：

QShortcut *enterAct = new QShortcut(Qt::Key_Return, m_urlEdt);
connect(enterAct, SIGNAL(activated()), this, SLOT(onGoButton()));

    m_urlMenu = new MyTrayMenu();
   m_urlMenu->setObjectName("urlMenu");
   m_urlMenu->setWindowFlags(Qt::Tool | Qt::FramelessWindowHint); //必须设置为此，否则有问题
   m_urlMenu->hide();
   connect(m_urlMenu, SIGNAL(triggered(QAction *)), this, SLOT(onChangeUrlMenu(QAction *)));

    connect(m_urlEdt, SIGNAL(focusInSig()), this, SLOT(onShowMenu()));
    connect(m_urlEdt, SIGNAL(focusOutSig()), this, SLOT(onHideMenu()));
   connect(m_urlEdt, SIGNAL(textChanged(const QString &)), this, SLOT(onTextChanged(const QString &)));

   m_lastSame = 0;

其它接口：

void ZTabWidget::onShowMenu() {
   m_tmpQueue.clear();
   m_tmpQueue = GlobalData::getInstance()->getQueueInfo();

   if (m_tmpQueue.size() <= 0) {
       return;
   }

   if (m_urlMenu->isVisible()) {
       return;
   }

   m_urlMenu->clear();
   int sameCount = 0;
   for (int i = 0; i < m_tmpQueue.size(); i++) {
       QString currentTxt = m_urlEdt->text();
       if (m_tmpQueue.at(i).contains(currentTxt)) {
           contentUrlWidget[i] = new QWidget();
           contentUrlWidget[i]->setFixedHeight(20);
           contentUrlWidget[i]->setObjectName("contentUrlWidget");
           contentUrlLabel[i] = new QLabel(m_tmpQueue.at(i));
           contentUrlLabel[i]->setObjectName("contentUrlLabel");
           contentUrlLabel[i]->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
           QHBoxLayout *layout = new QHBoxLayout();
           layout->setContentsMargins(5, 2, 0, 2);
           layout->addWidget(contentUrlLabel[i]);
           contentUrlWidget[i]->setLayout(layout);
           contentAction[i] = new QWidgetAction(m_urlMenu);
           contentAction[i]->setDefaultWidget(contentUrlWidget[i]);
           contentAction[i]->setObjectName("contentAction");
           m_urlMenu->addAction(contentAction[i]);
           sameCount++;
       }
   }

   if (sameCount > 0) {
       m_urlMenu->setFixedWidth(m_urlEdt->width());
       QPoint point = m_urlEdt->mapToGlobal(QPoint(0,0));
       m_urlMenu->move(point.x(), point.y()+20);
       m_urlMenu->show();
   }
}

void ZTabWidget::onHideMenu() {
   m_urlMenu->hide();
}

void ZTabWidget::onChangeUrlMenu(QAction *action) {
   int index = -1;
   for (int i = 0; i < m_tmpQueue.size(); i++) {
       if (contentAction[i] == action) {
           index = i;
       }
   }

   m_urlEdt->setText(m_tmpQueue.at(index));
   onGoButton();
}

void ZTabWidget::onTextChanged(const QString &string) {

   int sameCount = 0;
   for (int i = 0; i < m_tmpQueue.size(); i++) {
       if (m_tmpQueue.at(i).contains(string.toLower())) {
           sameCount++;
       }
   }

   if (sameCount != m_lastSame) {
       m_lastSame = sameCount;
       m_urlMenu->hide();
       onShowMenu();
   }
}

其它文件：

文件1.h

#ifndef MYTRAYMENU_H
#define MYTRAYMENU_H

#include <QLabel>
#include <QPushButton>
#include <QMenu>

class MyTrayMenu:public QMenu
{
   Q_OBJECT
public:
   explicit MyTrayMenu(QWidget *parent = 0);
   ~MyTrayMenu(){}

signals:
   void leaveAction();

protected:
   void leaveEvent(QEvent *event);

};
#endif

文件1.cpp

#include "MyTrayMenu.h"
#include <QEvent>

MyTrayMenu::MyTrayMenu(QWidget *parent)
:QMenu(parent)
{
   this->installEventFilter(this);
}

void MyTrayMenu::leaveEvent(QEvent *event) {
    this->hide();
    emit leaveAction();
   QMenu::leaveEvent(event);
}

#ifndef URLLINEEDIT_H
#define URLLINEEDIT_H

#include <QLineEdit>
#include <QLabel>

文件2.h
class UrlLineEdit : public QLineEdit
{
   Q_OBJECT
public:
   UrlLineEdit(QWidget *parent = 0);
   ~UrlLineEdit();

signals:
   void focusInSig();
   void focusOutSig();

protected:
    virtual void focusInEvent(QFocusEvent *e);
    virtual void focusOutEvent(QFocusEvent *e);
   virtual void mousePressEvent(QMouseEvent *event);

};
#endif

文件2.cpp

#include "UrlLineEdit.h"
#include <QFocusEvent>

UrlLineEdit::UrlLineEdit(QWidget *parent)
:QLineEdit(parent)
{

}

UrlLineEdit::~UrlLineEdit()
{

}

void UrlLineEdit::focusInEvent(QFocusEvent *e)
{
   if (e->gotFocus() && e->reason() == Qt::MouseFocusReason) {
       emit focusInSig();
   }

   QLineEdit::focusInEvent(e);
}

void UrlLineEdit::focusOutEvent(QFocusEvent *e)
{
   if (e->lostFocus() && e->reason() == Qt::MouseFocusReason) {
       emit focusOutSig();
   }

   QLineEdit::focusOutEvent(e);
}

void UrlLineEdit::mousePressEvent(QMouseEvent *event) {
   emit focusInSig();
   QLineEdit::mousePressEvent(event);
}

QMenu实现URL记忆功能

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