QT5 无边框Widget和自定义程序启动画面

一、简介

模仿QQ设置面板，自定义Widget,并实现了窗体的拖拽，关闭，最小化功能。

二、详解

1、模仿QQ系统设置的无边框界面

（1）代码

mainwidget.h：

#ifndef MAINWIDGET_H
#define MAINWIDGET_H

#include <QWidget>
#include <TPPPushButton.h>

class MainWidget : public QWidget
{
Q_OBJECT

public:
MainWidget(QWidget *parent = 0);
~MainWidget();

protected:
void paintEvent(QPaintEvent *event);
void resizeEvent(QResizeEvent *event);

private:
TPPPushButton *minButton;
TPPPushButton *closeButton;
QRect rectMove;

};

#endif // MAINWIDGET_H

mainwidget.cpp：

#include "mainwidget.h"

MainWidget::MainWidget(QWidget *parent)
: QWidget(parent, Qt::FramelessWindowHint)
{
resize(700, 500);
rectMove = QRect(0, 0, width(), 35);

minButton = new TPPPushButton(this);
minButton->setPicName(":/titleButtons/min");
minButton->setToolTip(tr("minimize"));
connect(minButton, SIGNAL(clicked()), this, SLOT(showMinimized()));

closeButton = new TPPPushButton(this);
closeButton->setPicName(":/titleButtons/close");
closeButton->setToolTip(tr("close"));
connect(closeButton, SIGNAL(clicked()), this, SLOT(close()));
}

MainWidget::~MainWidget()
{

}

void MainWidget::resizeEvent(QResizeEvent *event)
{
minButton->move(width() - 27 - closeButton->width(), 6);
closeButton->move(width() - 27, 6);
QWidget::resizeEvent(event);
}

void MainWidget::paintEvent(QPaintEvent *event)
{
QPainter painter(this);
painter.setPen(Qt::NoPen);
painter.setBrush(QColor("#F0F0F0"));
painter.drawRect(this->rect());
painter.setBrush(QColor("#069dd5"));
painter.drawRect(rectMove);
painter.setPen(QColor("#D7D7D7"));
painter.drawLine(0, 70, this->width(), 70);
QWidget::paintEvent(event);
}

三、总结

（1）相应的代码已上传到csdn http://download.csdn.net/detail/zuoyuexian/9819147 。

（2）若有建议，请留言，在此先感谢！