#include "framelesswidget2.h" #include "qevent.h" #include "qdebug.h" FramelessWidget2::FramelessWidget2(QObject *parent) : QObject(parent) { padding = 8; moveEnable = true; resizeEnable = true; widget = 0; mousePressed = false; mousePoint = QPoint(0, 0); mouseRect = QRect(0, 0, 0, 0); for (int i = 0; i < 8; ++i) { pressedArea << false; pressedRect << QRect(0, 0, 0, 0); } //如果父类是窗体则直接设置 if (parent->isWidgetType()) { setWidget((QWidget *)parent); } } bool FramelessWidget2::eventFilter(QObject *watched, QEvent *event) { if (widget && watched == widget) { if (event->type() == QEvent::WindowStateChange) { //解决mac系统上无边框最小化失效的bug #ifdef Q_OS_MACOS if (widget->windowState() & Qt::WindowMinimized) { isMin = true; } else { if (isMin) { //设置无边框属性 widget->setWindowFlags(flags | Qt::FramelessWindowHint); widget->setVisible(true); isMin = false; } } #endif } else if (event->type() == QEvent::Resize) { //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 int width = widget->width(); int height = widget->height(); //左侧描点区域 pressedRect[0] = QRect(0, padding, padding, height - padding * 2); //右侧描点区域 pressedRect[1] = QRect(width - padding, padding, padding, height - padding * 2); //上侧描点区域 pressedRect[2] = QRect(padding, 0, width - padding * 2, padding); //下侧描点区域 pressedRect[3] = QRect(padding, height - padding, width - padding * 2, padding); //左上角描点区域 pressedRect[4] = QRect(0, 0, padding, padding); //右上角描点区域 pressedRect[5] = QRect(width - padding, 0, padding, padding); //左下角描点区域 pressedRect[6] = QRect(0, height - padding, padding, padding); //右下角描点区域 pressedRect[7] = QRect(width - padding, height - padding, padding, padding); } else if (event->type() == QEvent::HoverMove) { //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 QHoverEvent *hoverEvent = (QHoverEvent *)event; QPoint point = hoverEvent->pos(); if (resizeEnable) { if (pressedRect.at(0).contains(point)) { widget->setCursor(Qt::SizeHorCursor); } else if (pressedRect.at(1).contains(point)) { widget->setCursor(Qt::SizeHorCursor); } else if (pressedRect.at(2).contains(point)) { widget->setCursor(Qt::SizeVerCursor); } else if (pressedRect.at(3).contains(point)) { widget->setCursor(Qt::SizeVerCursor); } else if (pressedRect.at(4).contains(point)) { widget->setCursor(Qt::SizeFDiagCursor); } else if (pressedRect.at(5).contains(point)) { widget->setCursor(Qt::SizeBDiagCursor); } else if (pressedRect.at(6).contains(point)) { widget->setCursor(Qt::SizeBDiagCursor); } else if (pressedRect.at(7).contains(point)) { widget->setCursor(Qt::SizeFDiagCursor); } else { widget->setCursor(Qt::ArrowCursor); } } //根据当前鼠标位置,计算XY轴移动了多少 int offsetX = point.x() - mousePoint.x(); int offsetY = point.y() - mousePoint.y(); //根据按下处的位置判断是否是移动控件还是拉伸控件 if (moveEnable && mousePressed) { widget->move(widget->x() + offsetX, widget->y() + offsetY); } if (resizeEnable) { int rectX = mouseRect.x(); int rectY = mouseRect.y(); int rectW = mouseRect.width(); int rectH = mouseRect.height(); if (pressedArea.at(0)) { int resizeW = widget->width() - offsetX; if (widget->minimumWidth() <= resizeW) { widget->setGeometry(widget->x() + offsetX, rectY, resizeW, rectH); } } else if (pressedArea.at(1)) { widget->setGeometry(rectX, rectY, rectW + offsetX, rectH); } else if (pressedArea.at(2)) { int resizeH = widget->height() - offsetY; if (widget->minimumHeight() <= resizeH) { widget->setGeometry(rectX, widget->y() + offsetY, rectW, resizeH); } } else if (pressedArea.at(3)) { widget->setGeometry(rectX, rectY, rectW, rectH + offsetY); } else if (pressedArea.at(4)) { int resizeW = widget->width() - offsetX; int resizeH = widget->height() - offsetY; if (widget->minimumWidth() <= resizeW) { widget->setGeometry(widget->x() + offsetX, widget->y(), resizeW, resizeH); } if (widget->minimumHeight() <= resizeH) { widget->setGeometry(widget->x(), widget->y() + offsetY, resizeW, resizeH); } } else if (pressedArea.at(5)) { int resizeW = rectW + offsetX; int resizeH = widget->height() - offsetY; if (widget->minimumHeight() <= resizeH) { widget->setGeometry(widget->x(), widget->y() + offsetY, resizeW, resizeH); } } else if (pressedArea.at(6)) { int resizeW = widget->width() - offsetX; int resizeH = rectH + offsetY; if (widget->minimumWidth() <= resizeW) { widget->setGeometry(widget->x() + offsetX, widget->y(), resizeW, resizeH); } if (widget->minimumHeight() <= resizeH) { widget->setGeometry(widget->x(), widget->y(), resizeW, resizeH); } } else if (pressedArea.at(7)) { int resizeW = rectW + offsetX; int resizeH = rectH + offsetY; widget->setGeometry(widget->x(), widget->y(), resizeW, resizeH); } } } else if (event->type() == QEvent::MouseButtonPress) { //记住鼠标按下的坐标+窗体区域 QMouseEvent *mouseEvent = (QMouseEvent *)event; mousePoint = mouseEvent->pos(); mouseRect = widget->geometry(); //判断按下的手柄的区域位置 if (pressedRect.at(0).contains(mousePoint)) { pressedArea[0] = true; } else if (pressedRect.at(1).contains(mousePoint)) { pressedArea[1] = true; } else if (pressedRect.at(2).contains(mousePoint)) { pressedArea[2] = true; } else if (pressedRect.at(3).contains(mousePoint)) { pressedArea[3] = true; } else if (pressedRect.at(4).contains(mousePoint)) { pressedArea[4] = true; } else if (pressedRect.at(5).contains(mousePoint)) { pressedArea[5] = true; } else if (pressedRect.at(6).contains(mousePoint)) { pressedArea[6] = true; } else if (pressedRect.at(7).contains(mousePoint)) { pressedArea[7] = true; } else { mousePressed = true; } } else if (event->type() == QEvent::MouseMove) { //改成用HoverMove识别 } else if (event->type() == QEvent::MouseButtonRelease) { //恢复所有 widget->setCursor(Qt::ArrowCursor); mousePressed = false; for (int i = 0; i < 8; ++i) { pressedArea[i] = false; } } } return QObject::eventFilter(watched, event); } void FramelessWidget2::setPadding(int padding) { this->padding = padding; } void FramelessWidget2::setMoveEnable(bool moveEnable) { this->moveEnable = moveEnable; } void FramelessWidget2::setResizeEnable(bool resizeEnable) { this->resizeEnable = resizeEnable; } void FramelessWidget2::setMousePressed(bool mousePressed) { this->mousePressed = mousePressed; } void FramelessWidget2::setWidget(QWidget *widget) { if (this->widget == 0) { this->widget = widget; //设置鼠标追踪为真 this->widget->setMouseTracking(true); //绑定事件过滤器 this->widget->installEventFilter(this); //设置悬停为真,必须设置这个,不然当父窗体里边还有子窗体全部遮挡了识别不到MouseMove,需要识别HoverMove this->widget->setAttribute(Qt::WA_Hover, true); isMin = false; flags = widget->windowFlags(); } }