Qt浅谈之四十五QSplitter实现自由伸缩滑动窗口

本文主要是介绍Qt浅谈之四十五QSplitter实现自由伸缩滑动窗口，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

一、简介

 

        最近看到一篇Qt实现伸缩滑动的窗口的文章，但其代码不完整。便在此重新书写了完整的代码，并开源出来。窗口的中央有滑动条可以动态改变子窗口的大小，隐藏的按钮可以快速伸缩子窗口。其效果图如下：

 

二、详解

1、代码

（1）slidingwindow.h

#ifndef SLIDINGWINDOW_H
#define SLIDINGWINDOW_H#include <QtGui>class SlidingWindow : public QWidget
{Q_OBJECTpublic:SlidingWindow(QWidget *parent = 0);~SlidingWindow();protected:void mousePressEvent ( QMouseEvent * event);void mouseMoveEvent(QMouseEvent *event);void mouseReleaseEvent(QMouseEvent *event);void resizeEvent(QResizeEvent *event);bool eventFilter(QObject *obj, QEvent *event);private:void setBtnPos();void setBtnIcon();private slots:void slotClickedBtn();void slotSplitterMoved(int pos, int index);private:QPoint dragPosition;bool bPressFlag;QSplitter *splitter;QFrame *contentFrame;QFrame *listFrame;QPushButton *pushButton;QIcon leftIcon;QIcon rightIcon;
};#endif // SLIDINGWINDOW_H

（2）slidingwindow.cpp

#include "slidingwindow.h"SlidingWindow::SlidingWindow(QWidget *parent): QWidget(parent, Qt::FramelessWindowHint), bPressFlag(false)
{resize(660, 460);splitter = new QSplitter(Qt::Horizontal, this);splitter->setHandleWidth(1);splitter->setStyleSheet("QSplitter::handle{background:#FFFFFF}");contentFrame = new QFrame(splitter);contentFrame->setStyleSheet("background:#000000");contentFrame->resize(475, height());contentFrame->setMinimumWidth(405);listFrame = new QFrame(splitter);listFrame->setStyleSheet("background:#323232");listFrame->resize(660 - 475, height());listFrame->setMaximumWidth(660 - 405);connect(splitter, SIGNAL(splitterMoved(int,int)), this, SLOT(slotSplitterMoved(int,int)));leftIcon = QIcon(":/left.png");rightIcon = QIcon(":/right.png");pushButton = new QPushButton(this);pushButton->setFocusPolicy(Qt::NoFocus);pushButton->hide();pushButton->setFixedSize(13, 42);pushButton->setIconSize(pushButton->size());pushButton->setStyleSheet("border:none;");pushButton->setIcon(rightIcon);pushButton->move(contentFrame->width() - pushButton->width()-2, (contentFrame->height() - pushButton->height())/2);connect(pushButton,SIGNAL(clicked()),this,SLOT(slotClickedBtn()));contentFrame->setMouseTracking(true);listFrame->setMouseTracking(true);contentFrame->installEventFilter(this);listFrame->installEventFilter(this);
}SlidingWindow::~SlidingWindow()
{}void SlidingWindow::resizeEvent(QResizeEvent *event)
{splitter->setGeometry(0, 0, width(), height());move((QApplication::desktop()->width() - width())/2,  (QApplication::desktop()->height() - height())/2);QWidget::resizeEvent(event);
}bool SlidingWindow::eventFilter(QObject *obj, QEvent *event)
{if (event->type() == QEvent::MouseMove) {QMouseEvent *mouseMove = static_cast<QMouseEvent*>(event);QRect rect = pushButton->frameGeometry();if (rect.contains(mouseMove->pos())) {pushButton->show();}else {pushButton->hide();}}return QWidget::eventFilter(obj, event);
}void SlidingWindow::setBtnPos()
{pushButton->move(contentFrame->width() - pushButton->width(), (contentFrame->height() - pushButton->height())/2);
}void SlidingWindow::setBtnIcon()
{if (listFrame->width() != 0) {pushButton->setIcon(rightIcon);}else {pushButton->setIcon(leftIcon);}
}void SlidingWindow::slotClickedBtn()
{QList <int> sizeList;sizeList.clear();if (listFrame->width() != 0) {sizeList.append(660);sizeList.append(0);}else {sizeList.append(475);sizeList.append(660 - 475);}splitter->setSizes(sizeList);setBtnIcon();setBtnPos();pushButton->hide();
}void SlidingWindow::slotSplitterMoved(int pos, int index)
{Q_UNUSED(pos)Q_UNUSED(index)setBtnIcon();setBtnPos();
}void SlidingWindow::mousePressEvent ( QMouseEvent * event)
{bPressFlag = true;dragPosition = event->pos();QWidget::mousePressEvent(event);
}void SlidingWindow::mouseMoveEvent(QMouseEvent *event)
{if (bPressFlag) {QPoint relaPos(QCursor::pos() - dragPosition);move(relaPos);}QWidget::mouseMoveEvent(event);
}void SlidingWindow::mouseReleaseEvent(QMouseEvent *event)
{bPressFlag = false;QWidget::mouseReleaseEvent(event);
}

（3）main.cpp

#include "slidingwindow.h"
#include <QApplication>int main(int argc, char *argv[])
{QApplication a(argc, argv);SlidingWindow w;w.show();return a.exec();
}

（4）编译运行

三、总结

（1）获取位置坐标可以尝试QPoint realPos(QCursor::pos() - this->pos());，这样不用类型转换。主要设置setMouseTracking(true);才能当鼠标不点击时移动鼠标进入mouseMoveEvent事件函数。
（2）源码已上传到csdn：http://download.csdn.net/detail/taiyang1987912/9439233。
（3）若有问题或建议，请留言，在此感谢！

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