C++ 使用 for Qt 制作无边框窗口
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原文地址: http://stackoverflow.com/questions/2235360/
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Making a borderless window with for Qt
提问by user63898
I'm new to Qt C++. I downloaded the latest windows version, did some tutorials and its great.
我是 Qt C++ 的新手。我下载了最新的 Windows 版本，做了一些教程，效果很好。
I saw some styling options that the Qt framework has and its great, but now I need to build my application that its main windows (form) it designed/skinned with image without the rectangle borders (borderless?).
我看到了 Qt 框架具有的一些样式选项并且它很棒，但是现在我需要构建我的应用程序，它的主窗口（窗体）是用没有矩形边框（无边框？）的图像设计/蒙皮的。
How can I do it with Qt?
我怎样才能用 Qt 做到这一点？
回答by Andy M
If your looking for some advanced styling in the shape of a widget, maybe this example will help you:
如果您正在寻找小部件形状的一些高级样式，也许这个例子会对您有所帮助：
Or maybe you're simply looking for this kind of flag: Qt::CustomizeWindowHintor simply Qt::FramelessWindowHint.
或者，也许您只是在寻找这种标志：Qt::CustomizeWindowHint或者只是Qt::FramelessWindowHint.
回答by Jorgen
I created a small example, of how to create VS2013 like frameless window in Qt5: 
我创建了一个小例子，说明如何在 Qt5 中创建类似 VS2013 的无框窗口：
You can get the complete sources here: https://github.com/Jorgen-VikingGod/Qt-Frameless-Window-DarkStyle
你可以在这里获得完整的资源：https: //github.com/Jorgen-VikingGod/Qt-Frameless-Window-DarkStyle
Otherwise here a code overview of how to embed the "main" mainwindow into the "frameless" window. Also you can see how to add titlebar, buttons and do maximize, resize and move of the frameless window.
否则这里是如何将“主”主窗口嵌入“无框架”窗口的代码概述。您还可以看到如何添加标题栏、按钮以及如何最大化、调整大小和移动无框窗口。
mainwindow.h
主窗口.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QtWidgets>
/*
place your QMainWindow code here
*/
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private:
Ui::MainWindow *ui;
};
/*
this class is to add frameless window supoort and do all the stuff with titlebar and buttons
*/
class BorderlessMainWindow: public QMainWindow
{
Q_OBJECT
public:
explicit BorderlessMainWindow(QWidget *parent = 0);
~BorderlessMainWindow() {}
protected:
void mouseMoveEvent(QMouseEvent* event);
void mousePressEvent(QMouseEvent* event);
void mouseReleaseEvent(QMouseEvent* event);
void mouseDoubleClickEvent(QMouseEvent *event);
private slots:
void slot_minimized();
void slot_restored();
void slot_maximized();
void slot_closed();
private:
MainWindow *mMainWindow;
QWidget *mTitlebarWidget;
QLabel *mWindowTitle;
QPushButton *mMinimizeButton;
QPushButton *mRestoreButton;
QPushButton *mMaximizeButton;
QPushButton *mCloseButton;
QPoint mLastMousePosition;
bool mMoving;
bool mMaximized;
};
#endif // MAINWINDOW_H
mainwindow.cpp
主窗口.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>
/*
frameless window class: it adds the MainWindow class inside the centralWidget
*/
BorderlessMainWindow::BorderlessMainWindow(QWidget *parent) : QMainWindow(parent, Qt::CustomizeWindowHint ) {
setObjectName("borderlessMainWindow");
setWindowFlags(Qt::FramelessWindowHint| Qt::WindowSystemMenuHint);
mMainWindow = new MainWindow(this);
setWindowTitle(mMainWindow->windowTitle());
QVBoxLayout *verticalLayout = new QVBoxLayout();
verticalLayout->setSpacing(0);
verticalLayout->setMargin(1);
QHBoxLayout *horizontalLayout = new QHBoxLayout();
horizontalLayout->setSpacing(0);
horizontalLayout->setMargin(0);
mTitlebarWidget = new QWidget(this);
mTitlebarWidget->setObjectName("titlebarWidget");
mTitlebarWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
mTitlebarWidget->setLayout(horizontalLayout);
mMinimizeButton = new QPushButton(mTitlebarWidget);
mMinimizeButton->setObjectName("minimizeButton");
connect(mMinimizeButton, SIGNAL(clicked()), this, SLOT(slot_minimized()));
mRestoreButton = new QPushButton(mTitlebarWidget);
mRestoreButton->setObjectName("restoreButton");
mRestoreButton->setVisible(false);
connect(mRestoreButton, SIGNAL(clicked()), this, SLOT(slot_restored()));
mMaximizeButton = new QPushButton(mTitlebarWidget);
mMaximizeButton->setObjectName("maximizeButton");
connect(mMaximizeButton, SIGNAL(clicked()), this, SLOT(slot_maximized()));
mCloseButton = new QPushButton(mTitlebarWidget);
mCloseButton->setObjectName("closeButton");
connect(mCloseButton, SIGNAL(clicked()), this, SLOT(slot_closed()));
mWindowTitle = new QLabel(mTitlebarWidget);
mWindowTitle->setObjectName("windowTitle");
mWindowTitle->setText(windowTitle());
horizontalLayout->addWidget(mWindowTitle);
horizontalLayout->addStretch(1);
horizontalLayout->addWidget(mMinimizeButton);
horizontalLayout->addWidget(mRestoreButton);
horizontalLayout->addWidget(mMaximizeButton);
horizontalLayout->addWidget(mCloseButton);
verticalLayout->addWidget(mTitlebarWidget);
verticalLayout->addWidget(mMainWindow);
QWidget *centralWidget = new QWidget(this);
centralWidget->setObjectName("centralWidget");
centralWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
centralWidget->setLayout(verticalLayout);
setCentralWidget(centralWidget);
}
void BorderlessMainWindow::mousePressEvent(QMouseEvent* event) {
if (!mTitlebarWidget->underMouse() && !mWindowTitle->underMouse())
return;
if(event->button() == Qt::LeftButton) {
mMoving = true;
mLastMousePosition = event->pos();
}
}
void BorderlessMainWindow::mouseMoveEvent(QMouseEvent* event) {
if (!mTitlebarWidget->underMouse() && !mWindowTitle->underMouse())
return;
if( event->buttons().testFlag(Qt::LeftButton) && mMoving) {
this->move(this->pos() + (event->pos() - mLastMousePosition));
}
}
void BorderlessMainWindow::mouseReleaseEvent(QMouseEvent* event) {
if (!mTitlebarWidget->underMouse() && !mWindowTitle->underMouse())
return;
if(event->button() == Qt::LeftButton) {
mMoving = false;
}
}
void BorderlessMainWindow::mouseDoubleClickEvent(QMouseEvent *event) {
Q_UNUSED(event);
if (!mTitlebarWidget->underMouse() && !mWindowTitle->underMouse())
return;
mMaximized = !mMaximized;
if (mMaximized) {
slot_maximized();
} else {
slot_restored();
}
}
void BorderlessMainWindow::slot_minimized() {
setWindowState(Qt::WindowMinimized);
}
void BorderlessMainWindow::slot_restored() {
mRestoreButton->setVisible(false);
mMaximizeButton->setVisible(true);
setWindowState(Qt::WindowNoState);
setStyleSheet("#borderlessMainWindow{border:1px solid palette(highlight);}");
}
void BorderlessMainWindow::slot_maximized() {
mRestoreButton->setVisible(true);
mMaximizeButton->setVisible(false);
setWindowState(Qt::WindowMaximized);
setStyleSheet("#borderlessMainWindow{border:1px solid palette(base);}");
}
void BorderlessMainWindow::slot_closed() {
close();
}
/*
MainWindow class: put all your code here
*/
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent, Qt::FramelessWindowHint), ui(new Ui::MainWindow) {
ui->setupUi(this);
statusBar()->setSizeGripEnabled(true);
}
MainWindow::~MainWindow() {
delete ui;
}
回答by Fernando Lopez Jr.
There is a sample application in your Qt directory: examples/widgets/windowsflags.
Qt 目录中有一个示例应用程序：examples/widgets/windowsflags.
回答by Ian
I ran into this myself and figured it out after some time. Check out https://github.com/ianbannerman/TrueFramelessWindowfor sample code for both Windows & macOS.
我自己遇到了这个问题，并在一段时间后弄清楚了。查看https://github.com/ianbannerman/TrueFramelessWindow获取适用于 Windows 和 macOS 的示例代码。
Qt::FramelessWindowHint sacrifices resizing and min/max/close, so is probably not what mot people are looking for.
Qt::FramelessWindowHint 牺牲了调整大小和最小/最大/关闭，所以可能不是人们正在寻找的。
