211 lines
8.6 KiB
C++
211 lines
8.6 KiB
C++
#include "framelesswidget.h"
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#include "qevent.h"
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#include "qdebug.h"
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FramelessWidget::FramelessWidget(QObject *parent) : QObject(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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widget = 0;
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pressed = false;
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pressedLeft = false;
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pressedRight = false;
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pressedTop = false;
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pressedBottom = false;
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pressedLeftTop = false;
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pressedRightTop = false;
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pressedLeftBottom = false;
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pressedRightBottom = false;
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//如果父类是窗体则直接设置
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if (parent->isWidgetType()) {
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setWidget((QWidget *)parent);
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}
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}
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bool FramelessWidget::eventFilter(QObject *watched, QEvent *event)
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{
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if (widget != 0 && watched == widget) {
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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 = widget->width();
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int height = widget->height();
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//左侧描点区域
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rectLeft = QRect(0, padding, padding, height - padding * 2);
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//上侧描点区域
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rectTop = QRect(padding, 0, width - padding * 2, padding);
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//右侧描点区域
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rectRight = QRect(width - padding, padding, padding, height - padding * 2);
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//下侧描点区域
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rectBottom = QRect(padding, height - padding, width - padding * 2, padding);
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//左上角描点区域
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rectLeftTop = QRect(0, 0, padding, padding);
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//右上角描点区域
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rectRightTop = QRect(width - padding, 0, padding, padding);
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//左下角描点区域
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rectLeftBottom = QRect(0, height - padding, padding, padding);
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//右下角描点区域
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rectRightBottom = 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 (rectLeft.contains(point)) {
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widget->setCursor(Qt::SizeHorCursor);
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} else if (rectRight.contains(point)) {
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widget->setCursor(Qt::SizeHorCursor);
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} else if (rectTop.contains(point)) {
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widget->setCursor(Qt::SizeVerCursor);
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} else if (rectBottom.contains(point)) {
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widget->setCursor(Qt::SizeVerCursor);
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} else if (rectLeftTop.contains(point)) {
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widget->setCursor(Qt::SizeFDiagCursor);
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} else if (rectRightTop.contains(point)) {
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widget->setCursor(Qt::SizeBDiagCursor);
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} else if (rectLeftBottom.contains(point)) {
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widget->setCursor(Qt::SizeBDiagCursor);
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} else if (rectRightBottom.contains(point)) {
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widget->setCursor(Qt::SizeFDiagCursor);
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} else {
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widget->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() - lastPos.x();
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int offsetY = point.y() - lastPos.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) {
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if (pressed) {
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widget->move(widget->x() + offsetX, widget->y() + offsetY);
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}
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}
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if (resizeEnable) {
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if (pressedLeft) {
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int resizeW = widget->width() - offsetX;
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if (widget->minimumWidth() <= resizeW) {
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widget->setGeometry(widget->x() + offsetX, rectY, resizeW, rectH);
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}
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} else if (pressedRight) {
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widget->setGeometry(rectX, rectY, rectW + offsetX, rectH);
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} else if (pressedTop) {
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int resizeH = widget->height() - offsetY;
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if (widget->minimumHeight() <= resizeH) {
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widget->setGeometry(rectX, widget->y() + offsetY, rectW, resizeH);
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}
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} else if (pressedBottom) {
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widget->setGeometry(rectX, rectY, rectW, rectH + offsetY);
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} else if (pressedLeftTop) {
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int resizeW = widget->width() - offsetX;
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int resizeH = widget->height() - offsetY;
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if (widget->minimumWidth() <= resizeW) {
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widget->setGeometry(widget->x() + offsetX, widget->y(), resizeW, resizeH);
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}
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if (widget->minimumHeight() <= resizeH) {
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widget->setGeometry(widget->x(), widget->y() + offsetY, resizeW, resizeH);
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}
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} else if (pressedRightTop) {
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int resizeW = rectW + offsetX;
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int resizeH = widget->height() - offsetY;
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if (widget->minimumHeight() <= resizeH) {
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widget->setGeometry(widget->x(), widget->y() + offsetY, resizeW, resizeH);
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}
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} else if (pressedLeftBottom) {
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int resizeW = widget->width() - offsetX;
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int resizeH = rectH + offsetY;
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if (widget->minimumWidth() <= resizeW) {
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widget->setGeometry(widget->x() + offsetX, widget->y(), resizeW, resizeH);
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}
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if (widget->minimumHeight() <= resizeH) {
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widget->setGeometry(widget->x(), widget->y(), resizeW, resizeH);
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}
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} else if (pressedRightBottom) {
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int resizeW = rectW + offsetX;
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int resizeH = rectH + offsetY;
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widget->setGeometry(widget->x(), widget->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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//记住当前控件坐标和宽高以及鼠标按下的坐标
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QMouseEvent *mouseEvent = (QMouseEvent *)event;
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rectX = widget->x();
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rectY = widget->y();
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rectW = widget->width();
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rectH = widget->height();
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lastPos = mouseEvent->pos();
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//判断按下的手柄的区域位置
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if (rectLeft.contains(lastPos)) {
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pressedLeft = true;
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} else if (rectRight.contains(lastPos)) {
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pressedRight = true;
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} else if (rectTop.contains(lastPos)) {
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pressedTop = true;
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} else if (rectBottom.contains(lastPos)) {
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pressedBottom = true;
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} else if (rectLeftTop.contains(lastPos)) {
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pressedLeftTop = true;
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} else if (rectRightTop.contains(lastPos)) {
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pressedRightTop = true;
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} else if (rectLeftBottom.contains(lastPos)) {
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pressedLeftBottom = true;
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} else if (rectRightBottom.contains(lastPos)) {
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pressedRightBottom = true;
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} else {
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pressed = 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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pressed = false;
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pressedLeft = false;
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pressedRight = false;
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pressedTop = false;
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pressedBottom = false;
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pressedLeftTop = false;
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pressedRightTop = false;
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pressedLeftBottom = false;
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pressedRightBottom = false;
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widget->setCursor(Qt::ArrowCursor);
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}
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}
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return QObject::eventFilter(watched, event);
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}
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void FramelessWidget::setPadding(int padding)
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{
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this->padding = padding;
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}
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void FramelessWidget::setMoveEnable(bool moveEnable)
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{
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this->moveEnable = moveEnable;
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}
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void FramelessWidget::setResizeEnable(bool resizeEnable)
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{
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this->resizeEnable = resizeEnable;
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}
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void FramelessWidget::setWidget(QWidget *widget)
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{
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if (this->widget == 0) {
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this->widget = widget;
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//设置鼠标追踪为真
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this->widget->setMouseTracking(true);
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//绑定事件过滤器
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this->widget->installEventFilter(this);
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//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
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this->widget->setAttribute(Qt::WA_Hover, true);
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}
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}
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