无边框窗口、控件的事件处理之nativeEvent（Qt 5.5.0）

<pre style="margin-top: 0px; margin-bottom: 0px;"><span style=" color:#000080;">#ifndef</span><span style=" color:#c0c0c0;"> </span>MAINWINDOW_H

#define MAINWINDOW_H

#include <QMainWindow>

#include <windows.h>

#include <windowsx.h>

#include <QLabel>

class MainWindow : public QLabel

{

Q_OBJECT

public:

MainWindow(QWidget *parent = 0);

~MainWindow();

public:

bool nativeEvent(const QByteArray &eventType, void *message, long *result);

};

#endif // MAINWINDOW_H

<strong><span style="color:#ff0000;">.cpp</span></strong>

<pre style="margin-top: 0px; margin-bottom: 0px;"><span style=" color:#000080;">#include</span><span style=" color:#c0c0c0;"> </span><span style=" color:#008000;">"mainwindow.h"</span>

#include <QDebug>

#include <QDialog>

MainWindow::MainWindow(QWidget *parent)

: QLabel(parent)

{

this->setWindowFlags(Qt::FramelessWindowHint);

this->setMinimumSize(45,45);

this->setStyleSheet("background:#ff0000");

}

MainWindow::~MainWindow()

{

}

bool MainWindow::nativeEvent(const QByteArray &eventType, void *message, long *result)

{

MSG* msg = (MSG*)message;

switch(msg->message)

{

case WM_NCHITTEST:

int xPos = GET_X_LPARAM(msg->lParam) - this->frameGeometry().x();

int yPos = GET_Y_LPARAM(msg->lParam) - this->frameGeometry().y();

if(this->childAt(xPos,yPos) == 0)

    {

*result = HTCAPTION;

}else{

return false;

}

if(xPos > 0 && xPos < 8)

*result = HTLEFT;

if(xPos > (this->width() - 8) && xPos < (this->width() - 0))

*result = HTRIGHT;

if(yPos > 0 && yPos < 8)

*result = HTTOP;

if(yPos > (this->height() - 8) && yPos < (this->height() - 0))

*result = HTBOTTOM;

if(xPos > 18 && xPos < 22 && yPos > 18 && yPos < 22)

*result = HTTOPLEFT;

        if(xPos >b233; (this->width() - 22) && xPos < (this->width() - 18) && yPos > 18 && yPos < 22)

*result = HTTOPRIGHT;

if(xPos > 18 && xPos < 22 && yPos > (this->height() - 22) && yPos < (this->height() - 18))

*result = HTBOTTOMLEFT;

if(xPos > (this->width() - 22) && xPos < (this->width() - 18) && yPos > (this->height() - 22) && yPos < (this->height() - 18))

*result = HTBOTTOMRIGHT;

return true;

}

return false;

}

<pre style="margin-top: 0px; margin-bottom: 0px;"><span style=" color:#000080;">#include</span><span style=" color:#c0c0c0;"> </span><span style=" color:#008000;"><QApplication></span>

#include <QPushButton>

#include "mainwindow.h"

#include "form.h"

int main(int argc, char *argv[])

{

QApplication a(argc, argv);

MainWindow w;

w.resize(100,100);

w.show();

return a.exec();

}