【二十七】【QT开发应用】VS如何复制项目,QT无边窗窗口Pro版本,信号与信号槽的应用,背景图片自适应控件大小

VS复制项目

在使用VS的过程中,有的时候我们需要复制我们已经存在的项目.

我们可以先创建一个新的项目.

接着把需要复制的项目的文件复制粘贴到新的项目文件夹中.

不要忘记添加现有项目.

CFrameLessWidgetBase.h

#pragma once
#include <QWidget>
class CFrameLessWidgetBase : public QWidget{
   
	QOBJECT_H

public:
	CFrameLessWidgetBase(QWidget* p = nullptr);
	~CFrameLessWidgetBase();
private:

protected:
	bool nativeEvent(const QByteArray& eventType, void* message, qintptr* result) override;

private:
	int m_nBorderWidth = 10;
};

CFrameLessWidgetBase.cpp

#include "CFrameLessWidgetBase.h"
#include <qt_windows.h>
#include <windows.h>
#include <windowsx.h>

#pragma comment(lib, "user32.lib")
#pragma comment(lib,"dwmapi.lib")

CFrameLessWidgetBase::CFrameLessWidgetBase(QWidget* p)
	:QWidget(p) {
   
	this->setWindowFlags(Qt::FramelessWindowHint);
}
CFrameLessWidgetBase:: ~CFrameLessWidgetBase() {
   };

bool CFrameLessWidgetBase::nativeEvent(const QByteArray& eventType, void* message, qintptr* result) {
   
	MSG* param = static_cast<MSG*>(message);

	switch (param->message) {
   
	case WM_NCHITTEST:
	{
   

		/*int nX = GET_X_LPARAM(param->lParam) - this->geometry().x();
		int nY = GET_Y_LPARAM(param->lParam) - this->geometry().y();*/

		QPoint globalPos = QCursor::pos(); // 获取鼠标的全局坐标
		QPoint localPos = this->mapFromGlobal(globalPos); // 转换为窗口坐标
		int nX = localPos.x(); // 现在的 nX 应该是相对于窗口的坐标
		int nY = localPos.y();

		//if (childAt(nX, nY) != nullptr)
		//	return QWidget::nativeEvent(eventType, message, result);



		if (nX > m_nBorderWidth && nX < this->width() - m_nBorderWidth &&
			nY > m_nBorderWidth && nY < this->height() - m_nBorderWidth) {
   
			if (childAt(nX, nY) != nullptr)
				return QWidget::nativeEvent(eventType, message, result);
		}

		if ((nX > 0) && (nX < m_nBorderWidth))
			*result = HTLEFT;

		if ((nX > this->width() - m_nBorderWidth) && (nX < this->width()))
			*result = HTRIGHT;

		if ((nY > 0) && (nY < m_nBorderWidth))
			*result = HTTOP;

		if ((nY > this->height()