Qt软件开发文档6---dockWidget自定义标题栏

Qt 自带的 QDockWidget 的标题栏只有两个按钮， 浮动按钮和 关闭按钮。

往往满足不了需求，只适合需要我们自定义一个标题栏。

如下 标题栏实现了自定义的最小化，最大化，关闭按钮 ，接收到dock传来的标题信息





直接上代码:

1.声明一个MyDockTitleBar类

MyDockTitleBar.h

#ifndef MYDOCKTITLEBAR_H
#define MYDOCKTITLEBAR_H

#include <QSize>
#include <QDockWidget>
#include <QMouseEvent>
#include <QWidget>
#include <QPainter>
#include <QPaintEvent>
#include <QStyle>

class MyDockTitleBar : public QWidget
{
Q_OBJECT
public:
MyDockTitleBar(QString dockName,QWidget *parent = 0);

QSize sizeHint() const { return minimumSizeHint(); }
QSize minimumSizeHint() const;

int width;
QString name;//receive parent,s name
protected:
void paintEvent(QPaintEvent *event);//paint titleBar
void mousePressEvent(QMouseEvent *event); //mouse press

private:
QPixmap minPix, closePix, floatPix;

};

#endif // MYDOCKTITLEBAR_H

MyDockTitleBar.cpp

#include "myDockTitleBar.h"
MyDockTitleBar::MyDockTitleBar(QString dockName,QWidget *parent)
: QWidget(parent)
{
//pixMap
minPix = style()->standardPixmap(QStyle::SP_TitleBarMinButton);
closePix  = style()->standardPixmap(QStyle::SP_TitleBarCloseButton);
floatPix = style()->standardPixmap(QStyle::SP_TitleBarNormalButton);
name = dockName;
}

//set TitleBar minimumSize
QSize MyDockTitleBar::minimumSizeHint() const
{
return QSize(156, 24);
}

//绘制titleBar
void MyDockTitleBar::paintEvent(QPaintEvent*)
{
QPainter painter(this);
QRect rect = this->rect();
width = rect.width();
//drawPixmap
painter.setPen(QPen(QColor(185, 185, 185), 2, Qt::SolidLine));
painter.setBrush(QBrush(QColor(218, 218, 218), Qt::SolidPattern));
painter.drawRect(rect.left(), rect.top(), rect.width(), rect.height());
painter.drawPixmap(rect.topRight() - QPoint(closePix.width() + 10, -6), closePix);
painter.drawPixmap(rect.topRight() - QPoint(floatPix.width() + 10 + closePix.width() + 10, -6), floatPix);
painter.drawPixmap(rect.topRight() - QPoint(floatPix.width() + 10 + minPix.width() + 10
+ closePix.width() + 10, -3), minPix);
//drawText
painter.setPen(QPen(Qt::black, 1, Qt::SolidLine));
painter.setBrush(Qt::NoBrush);
painter.drawText(rect.left() + 10, rect.top()-2, rect.width(), rect.height(), Qt::AlignVCenter, name);

//draw   Blank area
painter.setPen(Qt::NoPen);
painter.setBrush(QBrush(QColor(240, 240, 240), Qt::SolidPattern));//设置画刷形式
painter.drawRect(rect.left(), rect.top() + 19, rect.width(), 5);

}

void MyDockTitleBar::mousePressEvent(QMouseEvent *event)
{
QPoint pos = event->pos();

QRect rect = this->rect();

QDockWidget *dw = qobject_cast<QDockWidget*>(parentWidget());
Q_ASSERT(dw != 0);

//in this case,pix width = 10,pix spacing = 10
int right = rect.right() - pos.x();
QWidget *widget = dw->widget();
if (right >= 10 && right <= 20)
{
event->accept();
dw->close();
}
else if (right >= 30 && right <= 40){
event->accept();
if (widget->isVisible()){

}
else {
widget->show();
//dw setMinimumWidth initialize
dw->setMinimumWidth(156);
}
}
else if (right >= 50 && right <= 60){
event->accept();
if (widget->isVisible()){
//click minPix ,dw setMinimumWidth
dw->setMinimumWidth(width);
widget->hide();
}
else {

}
}
}

在窗口中调用

dock[0] = new QDockWidget(tr("TreeView"),this);
dock[0]->setFeatures(QDockWidget::AllDockWidgetFeatures);//所有属性
dock[0]->setAllowedAreas(Qt::LeftDockWidgetArea);//设置允许停靠的窗口位置
dllName = "treeDll.dll";
funcName = "showTree";
MyDockTitleBar *titleBar0 = new MyDockTitleBar(tr("TreeView"), dock[0]);
dock[0]->setTitleBarWidget(titleBar0);
QWidget *tree = new QWidget(dock[0]);
tree = setWidget(dllName,funcName);
tree->setMinimumHeight(130);
dock[0]->setWidget(tree);
addDockWidget(Qt::LeftDockWidgetArea,dock[0]);

本文借鉴：https://www.oschina.net/code/snippet_1029551_20242