376 lines
14 KiB
C++
376 lines
14 KiB
C++
#include "framelessmainwindow.h"
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#include "qdatetime.h"
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#include "qevent.h"
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#include "qdebug.h"
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#ifdef Q_OS_WIN
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#include "windows.h"
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#include "windowsx.h"
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#pragma comment (lib,"user32.lib")
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#endif
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#define TIMEMS qPrintable(QTime::currentTime().toString("HH:mm:ss zzz"))
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FramelessMainWindow::FramelessMainWindow(QWidget *parent) : QMainWindow(parent)
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{
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padding = 8;
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moveEnable = true;
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resizeEnable = true;
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mousePressed = false;
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mousePoint = QPoint(0, 0);
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mouseRect = QRect(0, 0, 0, 0);
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for (int i = 0; i < 8; ++i) {
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pressedArea << false;
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pressedRect << QRect(0, 0, 0, 0);
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}
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isMin = false;
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flags = this->windowFlags();
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titleBar = 0;
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//设置背景透明 官方在5.3以后才彻底修复 WA_TranslucentBackground+FramelessWindowHint 并存不绘制的BUG
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#if (QT_VERSION >= QT_VERSION_CHECK(5,3,0))
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this->setAttribute(Qt::WA_TranslucentBackground);
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#endif
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//设置无边框属性
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this->setWindowFlags(flags | Qt::FramelessWindowHint);
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//安装事件过滤器识别拖动
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this->installEventFilter(this);
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//设置属性产生win窗体效果,移动到边缘半屏或者最大化等
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//设置以后会产生标题栏,需要在下面拦截消息WM_NCCALCSIZE重新去掉
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#ifdef Q_OS_WIN
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HWND hwnd = (HWND)this->winId();
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DWORD style = ::GetWindowLong(hwnd, GWL_STYLE);
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::SetWindowLong(hwnd, GWL_STYLE, style | WS_MAXIMIZEBOX | WS_THICKFRAME | WS_CAPTION);
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#endif
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}
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void FramelessMainWindow::showEvent(QShowEvent *event)
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{
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//解决有时候窗体重新显示的时候假死不刷新的BUG
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setAttribute(Qt::WA_Mapped);
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QMainWindow::showEvent(event);
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}
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void FramelessMainWindow::doWindowStateChange(QEvent *event)
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{
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//非最大化才能移动和拖动大小
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if (windowState() == Qt::WindowNoState) {
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moveEnable = true;
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resizeEnable = true;
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} else {
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moveEnable = false;
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resizeEnable = false;
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}
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//发出最大化最小化等改变事件,以便界面上更改对应的信息比如右上角图标和文字
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emit windowStateChange(!moveEnable);
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//解决mac系统上无边框最小化失效的BUG
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#ifdef Q_OS_MACOS
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if (windowState() & Qt::WindowMinimized) {
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isMin = true;
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} else {
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if (isMin) {
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//设置无边框属性
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this->setWindowFlags(flags | Qt::FramelessWindowHint);
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this->setVisible(true);
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isMin = false;
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}
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}
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#endif
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}
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void FramelessMainWindow::doResizeEvent(QEvent *event)
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{
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//非win系统的无边框拉伸,win系统上已经采用了nativeEvent来处理拉伸
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//为何不统一用计算的方式因为在win上用这个方式往左拉伸会发抖妹的
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#ifndef Q_OS_WIN
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if (event->type() == QEvent::Resize) {
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//重新计算八个描点的区域,描点区域的作用还有就是计算鼠标坐标是否在某一个区域内
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int width = this->width();
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int height = this->height();
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//左侧描点区域
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pressedRect[0] = QRect(0, padding, padding, height - padding * 2);
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//右侧描点区域
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pressedRect[1] = QRect(width - padding, padding, padding, height - padding * 2);
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//上侧描点区域
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pressedRect[2] = QRect(padding, 0, width - padding * 2, padding);
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//下侧描点区域
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pressedRect[3] = QRect(padding, height - padding, width - padding * 2, padding);
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//左上角描点区域
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pressedRect[4] = QRect(0, 0, padding, padding);
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//右上角描点区域
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pressedRect[5] = QRect(width - padding, 0, padding, padding);
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//左下角描点区域
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pressedRect[6] = QRect(0, height - padding, padding, padding);
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//右下角描点区域
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pressedRect[7] = QRect(width - padding, height - padding, padding, padding);
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} else if (event->type() == QEvent::HoverMove) {
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//设置对应鼠标形状,这个必须放在这里而不是下面,因为可以在鼠标没有按下的时候识别
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QHoverEvent *hoverEvent = (QHoverEvent *)event;
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QPoint point = hoverEvent->pos();
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if (resizeEnable) {
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if (pressedRect.at(0).contains(point)) {
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this->setCursor(Qt::SizeHorCursor);
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} else if (pressedRect.at(1).contains(point)) {
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this->setCursor(Qt::SizeHorCursor);
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} else if (pressedRect.at(2).contains(point)) {
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this->setCursor(Qt::SizeVerCursor);
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} else if (pressedRect.at(3).contains(point)) {
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this->setCursor(Qt::SizeVerCursor);
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} else if (pressedRect.at(4).contains(point)) {
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this->setCursor(Qt::SizeFDiagCursor);
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} else if (pressedRect.at(5).contains(point)) {
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this->setCursor(Qt::SizeBDiagCursor);
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} else if (pressedRect.at(6).contains(point)) {
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this->setCursor(Qt::SizeBDiagCursor);
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} else if (pressedRect.at(7).contains(point)) {
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this->setCursor(Qt::SizeFDiagCursor);
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} else {
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this->setCursor(Qt::ArrowCursor);
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}
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}
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//根据当前鼠标位置,计算XY轴移动了多少
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int offsetX = point.x() - mousePoint.x();
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int offsetY = point.y() - mousePoint.y();
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//根据按下处的位置判断是否是移动控件还是拉伸控件
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if (moveEnable && mousePressed) {
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this->move(this->x() + offsetX, this->y() + offsetY);
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}
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if (resizeEnable) {
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int rectX = mouseRect.x();
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int rectY = mouseRect.y();
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int rectW = mouseRect.width();
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int rectH = mouseRect.height();
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if (pressedArea.at(0)) {
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int resizeW = this->width() - offsetX;
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if (this->minimumWidth() <= resizeW) {
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this->setGeometry(this->x() + offsetX, rectY, resizeW, rectH);
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}
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} else if (pressedArea.at(1)) {
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this->setGeometry(rectX, rectY, rectW + offsetX, rectH);
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} else if (pressedArea.at(2)) {
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int resizeH = this->height() - offsetY;
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if (this->minimumHeight() <= resizeH) {
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this->setGeometry(rectX, this->y() + offsetY, rectW, resizeH);
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}
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} else if (pressedArea.at(3)) {
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this->setGeometry(rectX, rectY, rectW, rectH + offsetY);
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} else if (pressedArea.at(4)) {
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int resizeW = this->width() - offsetX;
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int resizeH = this->height() - offsetY;
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if (this->minimumWidth() <= resizeW) {
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this->setGeometry(this->x() + offsetX, this->y(), resizeW, resizeH);
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}
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if (this->minimumHeight() <= resizeH) {
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this->setGeometry(this->x(), this->y() + offsetY, resizeW, resizeH);
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}
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} else if (pressedArea.at(5)) {
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int resizeW = rectW + offsetX;
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int resizeH = this->height() - offsetY;
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if (this->minimumHeight() <= resizeH) {
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this->setGeometry(this->x(), this->y() + offsetY, resizeW, resizeH);
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}
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} else if (pressedArea.at(6)) {
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int resizeW = this->width() - offsetX;
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int resizeH = rectH + offsetY;
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if (this->minimumWidth() <= resizeW) {
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this->setGeometry(this->x() + offsetX, this->y(), resizeW, resizeH);
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}
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if (this->minimumHeight() <= resizeH) {
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this->setGeometry(this->x(), this->y(), resizeW, resizeH);
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}
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} else if (pressedArea.at(7)) {
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int resizeW = rectW + offsetX;
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int resizeH = rectH + offsetY;
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this->setGeometry(this->x(), this->y(), resizeW, resizeH);
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}
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}
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} else if (event->type() == QEvent::MouseButtonPress) {
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//记住鼠标按下的坐标+窗体区域
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QMouseEvent *mouseEvent = (QMouseEvent *)event;
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mousePoint = mouseEvent->pos();
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mouseRect = this->geometry();
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//判断按下的手柄的区域位置
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if (pressedRect.at(0).contains(mousePoint)) {
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pressedArea[0] = true;
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} else if (pressedRect.at(1).contains(mousePoint)) {
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pressedArea[1] = true;
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} else if (pressedRect.at(2).contains(mousePoint)) {
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pressedArea[2] = true;
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} else if (pressedRect.at(3).contains(mousePoint)) {
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pressedArea[3] = true;
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} else if (pressedRect.at(4).contains(mousePoint)) {
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pressedArea[4] = true;
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} else if (pressedRect.at(5).contains(mousePoint)) {
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pressedArea[5] = true;
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} else if (pressedRect.at(6).contains(mousePoint)) {
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pressedArea[6] = true;
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} else if (pressedRect.at(7).contains(mousePoint)) {
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pressedArea[7] = true;
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} else {
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mousePressed = true;
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}
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} else if (event->type() == QEvent::MouseMove) {
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//改成用HoverMove识别
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} else if (event->type() == QEvent::MouseButtonRelease) {
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//恢复所有
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this->setCursor(Qt::ArrowCursor);
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mousePressed = false;
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for (int i = 0; i < 8; ++i) {
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pressedArea[i] = false;
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}
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}
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#endif
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}
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bool FramelessMainWindow::eventFilter(QObject *watched, QEvent *event)
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{
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if (watched == this) {
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if (event->type() == QEvent::WindowStateChange) {
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doWindowStateChange(event);
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} else {
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doResizeEvent(event);
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}
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} else if (watched == titleBar) {
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//双击标题栏发出双击信号给主界面
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//下面的 *result = HTCAPTION; 标志位也会自动识别双击标题栏
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#ifndef Q_OS_WIN
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if (event->type() == QEvent::MouseButtonDblClick) {
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emit titleDblClick();
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} else if (event->type() == QEvent::NonClientAreaMouseButtonDblClick) {
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emit titleDblClick();
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}
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#endif
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}
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return QMainWindow::eventFilter(watched, event);
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}
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#if (QT_VERSION >= QT_VERSION_CHECK(6,0,0))
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bool FramelessMainWindow::nativeEvent(const QByteArray &eventType, void *message, qintptr *result)
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#else
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bool FramelessMainWindow::nativeEvent(const QByteArray &eventType, void *message, long *result)
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#endif
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{
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if (eventType == "windows_generic_MSG") {
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#ifdef Q_OS_WIN
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MSG *msg = static_cast<MSG *>(message);
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//qDebug() << TIMEMS << "nativeEvent" << msg->wParam << msg->message;
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//不同的消息类型和参数进行不同的处理
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if (msg->message == WM_NCCALCSIZE) {
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*result = 0;
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return true;
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} else if (msg->message == WM_SYSKEYDOWN) {
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//屏蔽alt键按下
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} else if (msg->message == WM_SYSKEYUP) {
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//屏蔽alt键松开
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} else if (msg->message == WM_NCHITTEST) {
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//计算鼠标对应的屏幕坐标
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//这里最开始用的 LOWORD HIWORD 在多屏幕的时候会有问题
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//官方说明在这里 https://docs.microsoft.com/zh-cn/windows/win32/inputdev/wm-nchittest
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long x = GET_X_LPARAM(msg->lParam);
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long y = GET_Y_LPARAM(msg->lParam);
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QPoint pos = mapFromGlobal(QPoint(x, y));
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//判断当前鼠标位置在哪个区域
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bool left = pos.x() < padding;
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bool right = pos.x() > width() - padding;
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bool top = pos.y() < padding;
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bool bottom = pos.y() > height() - padding;
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//鼠标移动到四个角,这个消息是当鼠标移动或者有鼠标键按下时候发出的
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*result = 0;
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if (resizeEnable) {
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if (left && top) {
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*result = HTTOPLEFT;
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} else if (left && bottom) {
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*result = HTBOTTOMLEFT;
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} else if (right && top) {
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*result = HTTOPRIGHT;
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} else if (right && bottom) {
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*result = HTBOTTOMRIGHT;
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} else if (left) {
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*result = HTLEFT;
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} else if (right) {
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*result = HTRIGHT;
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} else if (top) {
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*result = HTTOP;
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} else if (bottom) {
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*result = HTBOTTOM;
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}
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}
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//先处理掉拉伸
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if (0 != *result) {
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return true;
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}
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//识别标题栏拖动产生半屏全屏效果
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if (titleBar != 0 && titleBar->rect().contains(pos)) {
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QWidget *child = titleBar->childAt(pos);
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if (!child) {
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*result = HTCAPTION;
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return true;
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}
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}
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} else if (msg->wParam == PBT_APMSUSPEND && msg->message == WM_POWERBROADCAST) {
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//系统休眠的时候自动最小化可以规避程序可能出现的问题
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this->showMinimized();
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} else if (msg->wParam == PBT_APMRESUMEAUTOMATIC) {
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//休眠唤醒后自动打开
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this->showNormal();
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}
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#endif
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} else if (eventType == "NSEvent") {
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#ifdef Q_OS_MACOS
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#endif
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} else if (eventType == "xcb_generic_event_t") {
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#ifdef Q_OS_LINUX
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#endif
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}
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return false;
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}
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#if (QT_VERSION < QT_VERSION_CHECK(5,0,0))
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#ifdef Q_OS_WIN
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bool FramelessMainWindow::winEvent(MSG *message, long *result)
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{
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return nativeEvent("windows_generic_MSG", message, result);
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}
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#endif
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#endif
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void FramelessMainWindow::setPadding(int padding)
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{
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this->padding = padding;
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}
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void FramelessMainWindow::setMoveEnable(bool moveEnable)
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{
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this->moveEnable = moveEnable;
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}
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void FramelessMainWindow::setResizeEnable(bool resizeEnable)
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{
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this->resizeEnable = resizeEnable;
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}
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void FramelessMainWindow::setTitleBar(QWidget *titleBar)
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{
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this->titleBar = titleBar;
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this->titleBar->installEventFilter(this);
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}
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