C++ qt标题栏组件绘制

怼烎@ 2024-04-20 04:13 5阅读 0赞

本博文源于笔者在学习C++ qt制作的标题栏组件，主要包含了，最小化，最大化，关闭。读者在看到这篇博文的时候，可以直接查看如何使用的，会使用了，然后进行复制粘贴源码部分即可。

### 问题来源 ###

想要制作一个qt标题栏组件

### 源码 ###

一个.h文件

#ifndef CTITLEBAR_H
    #define CTITLEBAR_H
    
    #include<QWidget>
    #include<QPushButton>
    #include<QLabel>
    #include<QHBoxLayout>
    
    
    class CTitleBar :public QWidget {
        
    	Q_OBJECT;
    public:
    	CTitleBar(QWidget *parent,QString title,bool showMinimizeButton = true,bool showMaximizeButton = true);
    	void setTitle(const QString& title);
    	void mousePressEvent(QMouseEvent *event);
    	void mouseMoveEvent(QMouseEvent* event);
    	void mouseReleaseEvent(QMouseEvent* event);
    signals:
    	void minimizeClicked();
    	void maximizeClicked();
    	void closeClicked();
    private:
    	QLabel* m_titleLabel;
    
    	QPoint dragPosition;
    	bool dragging;
    	
    private slots:
    	void onMinimizeClicked();
    	void onMaximizeClicked();
    	void onCloseClicked();
    };
    
    #endif

#include "CTitleBar.h"
    #include<QHBoxLayout>
    #include<QApplication>
    #include <QMouseEvent>
    CTitleBar::CTitleBar(QWidget *parent, QString title,bool showMinimizeButton, bool showMaximizeButton) :QWidget(parent) {
        
    	QHBoxLayout* layout = new QHBoxLayout(this);
    	layout->setContentsMargins(1, 0, 0, 0);
    	layout->setSpacing(0);
    	QString strSkinDir = QApplication::applicationDirPath() + "/skin/images/"; //添加资源图片
    
    	QLabel* iconLabel = new QLabel(this);
    	iconLabel->setPixmap(QIcon(strSkinDir + "/logo.png").pixmap(60, 60));  // 设置图标大小
    	iconLabel->setFixedSize(20, 30);
    																			// 标题标签
    	m_titleLabel = new QLabel(title, this);
    	m_titleLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    	m_titleLabel->setContentsMargins(0, 0, 0, 0);
    	layout->addWidget(iconLabel);
    	layout->addWidget(m_titleLabel);
    
    	QPushButton* minimizeButton = nullptr;
    	QPushButton* maximizeButton = nullptr;
    	if (showMinimizeButton) {
        
    		minimizeButton = new QPushButton(this);
    		minimizeButton->setIcon(QIcon(strSkinDir + "/min.png"));
    		minimizeButton->setObjectName("minButton");
    		minimizeButton->setStyleSheet("QPushButton:hover{background-color:rgb(184,184,184)}");
    		connect(minimizeButton, &QPushButton::clicked, this, &CTitleBar::onMinimizeClicked);
    		layout->addWidget(minimizeButton);
    	}
    
    	if (showMaximizeButton) {
        
    		maximizeButton = new QPushButton(this);
    		maximizeButton->setIcon(QIcon(strSkinDir + "/max.png"));
    		maximizeButton->setObjectName("maxButton");
    		maximizeButton->setStyleSheet("QPushButton:hover{background-color:rgb(184,184,184)}");
    		connect(maximizeButton, &QPushButton::clicked, this, &CTitleBar::onMaximizeClicked);
    		layout->addWidget(maximizeButton);
    	}
    	
    	QPushButton* closeButton = new QPushButton( this);
    
    	
    	closeButton->setIcon(QIcon(strSkinDir + "/close.png"));
    	closeButton->setObjectName("closeButton");
    	closeButton->setStyleSheet("QPushButton:hover{background-color:rgb(232,17,35)}");
    
    	connect(closeButton, &QPushButton::clicked, this, &CTitleBar::onCloseClicked);
    	layout->addWidget(closeButton);
    	this->setLayout(layout);
    	this->setFixedHeight(30);  // 设置标题栏高度
    }
    
    void CTitleBar::setTitle(const QString& title) {
        
    	m_titleLabel->setText(title);
    }
    
    void CTitleBar::mousePressEvent(QMouseEvent * event)
    {
        
    	if (event->button() == Qt::LeftButton) {
        
    		dragging = true;
    		dragPosition = event->pos();
    		event->accept();
    	}
    
    
    }
    
    void CTitleBar::mouseMoveEvent(QMouseEvent * event)
    {
        
    	if (dragging && (event->buttons() & Qt::LeftButton)) {
        
    		parentWidget()->move(event->globalPos() - mapToParent(dragPosition));
    		event->accept();
    	}
    }
    void CTitleBar::mouseReleaseEvent(QMouseEvent * event)
    {
        
    	dragging = false;
    }
    
    void CTitleBar::onMinimizeClicked() {
        
    	emit minimizeClicked();
    }
    
    void CTitleBar::onMaximizeClicked() {
        
    	emit maximizeClicked();
    }
    
    void CTitleBar::onCloseClicked() {
        
    	emit closeClicked();
    }

### 如何使用 ###

创建一个垂直栏，将标题栏包起来就行。

#ifndef CDIALOG_H
    #define CDIALOG_H
    
    #include <QDialog>
    #include "CTitleBar.h"
    
    class CDialog : public QDialog {
        
    	Q_OBJECT
    public:
    	explicit CDialog(QString title, QWidget *parent = nullptr,bool showmin  = false,bool showmax = false, int width = 400, int height = 400);
    	virtual ~CDialog();
    	void setSubDialog(QLayout* subLayout); 
    
    protected:
    	void initUI(QString title,int width,int height,bool showmin,bool showmax);
    
    private:
    	CTitleBar* m_titleBar;
    	QVBoxLayout* m_layout; 
    	QLayout* m_subLayout;   
    };
    
    #endif // CDIALOG_H

#include "CDialog.h"
    #include <QVBoxLayout>
    
    CDialog::CDialog(QString title, QWidget *parent ,bool showmin, bool showmax, int width, int height) : QDialog(parent), m_subLayout(nullptr) {
        
    	setWindowFlags(windowFlags() | Qt::FramelessWindowHint);
    	
    	initUI(title,width,height,showmin,showmax);
    }
    
    CDialog::~CDialog() {
        
    }
    
    void CDialog::initUI(QString title,int width,int height, bool showmin, bool showmax) {
        
    	m_titleBar = new CTitleBar(this,title, showmin, showmax);
    	connect(m_titleBar, &CTitleBar::closeClicked, this, &CDialog::close);
    
    	m_layout = new QVBoxLayout(this);
    
    	m_layout->addWidget(m_titleBar,0,Qt::AlignTop);
    	m_layout->setContentsMargins(0, 0, 0, 0);
    	m_layout->setSpacing(0);
    	if (m_subLayout) {
        
    		m_layout->addLayout(m_subLayout);
    	}
    	setLayout(m_layout);
    	this->resize(width,height);
    	setStyleSheet("QDialog{background-color:white}");
    	m_titleBar->setStyleSheet("background-color:rgb(240,240,240)");
    }
    
    void CDialog::setSubDialog(QLayout* subLayout) {
        
    	if (subLayout != nullptr && m_layout != nullptr) {
        
    	
    		m_subLayout = subLayout;
    		m_layout->addLayout(m_subLayout);
    	}
    }

当你继承了这个CDialog的时候，就会直接出现一个标题栏和一个窗体了。  
![在这里插入图片描述][38f964e00fee4deb8c1405ba80ae8b8b.png]

[38f964e00fee4deb8c1405ba80ae8b8b.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/20/9ceae7410eda4c7f8ca928de5bad4c2c.png