Qt无边框基类(支持拖拽、最大化动画、半屏动画、最大化拖拽还原)
提供FramelessWidget类，可以将任意QMainWindow或者QWidget作为主窗口的程序直接通过setCenterWidget函数设置为无边框窗口。
特点：
1.支持上、下、左、右及左上、左下、右上、右下四角总共八个方向的拖拽
2.支持窗口最大化时向下拖拽进行还原；
3.支持拖动窗口至窗口最上端的动画效果；
4.支持拖动窗口至左侧和右侧进行半屏显示的动画效果；
5.限制了不能将窗口拖出屏幕外面；
6.边框阴影的2种实现方式。
关键代码：
bool FramelessWidget::eventFilter(QObject *watched, QEvent *event)
{
if (event->type() == QEvent::Resize)
{
int width = this->width();
int height = this->height();
//左侧描点区域
rectLeft = QRect(0, padding, padding, height - padding * 2);
//上侧描点区域
rectTop = QRect(padding, 0, width - padding * 2, padding);
//右侧描点区域
rectRight = QRect(width - padding, padding, padding, height - padding * 2);
//下侧描点区域
rectBottom = QRect(padding, height - padding, width - padding * 2, padding);
//左上角描点区域
rectLeftTop = QRect(0, 0, padding, padding);
//右上角描点区域
rectRightTop = QRect(width - padding, 0, padding, padding);
//左下角描点区域
rectLeftBottom = QRect(0, height - padding, padding, padding);
//右下角描点区域
rectRightBottom = QRect(width - padding, height - padding, padding, padding);
}
else if (event->type() == QEvent::HoverMove)
{
QHoverEvent *hoverEvent = dynamic_cast(event);
QPoint point = hoverEvent->pos();
if (resizeEnable)
{
if (rectLeft.contains(point))
{
this->setCursor(Qt::SizeHorCursor);
}
else if (rectRight.contains(point))
{
this->setCursor(Qt::SizeHorCursor);
}
else if (rectTop.contains(point))
{
this->setCursor(Qt::SizeVerCursor);
}
else if (rectBottom.contains(point))
{
this->setCursor(Qt::SizeVerCursor);
}
else if (rectLeftTop.contains(point))
{
this->setCursor(Qt::SizeFDiagCursor);
}
else if (rectRightTop.contains(point))
{
this->setCursor(Qt::SizeBDiagCursor);
}
else if (rectLeftBottom.contains(point))
{
this->setCursor(Qt::SizeBDiagCursor);
}
else if (rectRightBottom.contains(point))
{
this->setCursor(Qt::SizeFDiagCursor);
}
else
{
this->setCursor(Qt::ArrowCursor);
}
}
//根据当前鼠标位置,计算XY轴移动了多少
int offsetX = point.x() - lastPos.x();
int offsetY = point.y() - lastPos.y();
//当前最大&拖动距离大于20
if (pressed)
{
QPoint distance = point - lastPos;
int length = distance.manhattanLength();
if (length > 20)
{
if(this->isMaximized())
{ //! 最大化-->恢复初始状态
QRect rect = this->normalGeometry();
int desX = lastPos.x() * rect.width() / this->geometry().width();
int desY = lastPos.y();
rect.moveTopLeft(point - QPoint(desX, desY));
// this->setGeometry(rect);
lastPos = QPoint(desX, desY);
setZeroMargin(false);
this->showNormal();
m_windowState = DefaultWindow;
moveEnable = true;
resizeEnable = true;
}
else if(m_windowState == LeftHalfWindow || m_windowState == RightHalfWindow)
{ //! 半屏-->恢复初始状态
int desX = lastPos.x() * m_lastRect.width() / this->geometry().width();
int desY = lastPos.y();
m_lastRect.moveTopLeft(point - QPoint(desX, desY));
this->setGeometry(m_lastRect);
m_windowState = DefaultWindow;
moveEnable = true;
resizeEnable = true;
}
}
}
if (moveEnable)
{
if (pressed)
{
QRect _rect = QApplication::desktop()->availableGeometry();
if (_rect.width() - mapToGlobal(point).x() < 10)
{
if (!m_baseWidget->m_bHelpWidhetShow)
{
m_bubbleWidget->setMagicPoint(point+pos());
m_baseWidget->startAnimation(this->geometry(), QRect(_rect.width() / 2, 0, _rect.width() / 2, _rect.height()));
m_windowState = RightHalfWindow;
setZeroMargin(true);
}
}
else if (mapToGlobal(point).x() < 10)
{
if (!m_baseWidget->m_bHelpWidhetShow)
{
m_bubbleWidget->setMagicPoint(point+pos());
m_baseWidget->startAnimation(this->geometry(), QRect(0, 0, _rect.width() / 2, _rect.height()));
m_windowState = LeftHalfWindow;
setZeroMargin(true);
}
}
else if (mapToGlobal(point).y() < 10)
{
if (!m_baseWidget->m_bHelpWidhetShow)
{
m_bubbleWidget->setMagicPoint(point+pos());
m_baseWidget->startAnimation(this->geometry(), QRect(0, 0, _rect.width(), _rect.height()));
m_windowState = MaximumWindow;
setZeroMargin(true);
}
}
else
{
m_baseWidget->hide();
setZeroMargin(false);
}
//! 限制不能拖到屏幕底部之外
int height = QApplication::desktop()->availableGeometry().height();
if(mapToGlobal(point).y() >= height)
offsetY = 0;
this->move(this->x() + offsetX, this->y() + offsetY);
}
}
if (resizeEnable)
{
if (pressedLeft)
{
int resizeW = this->width() - offsetX;
if (this->minimumWidth() <= resizeW)
{
this->setGeometry(this->x() + offsetX, rectY, resizeW, rectH);
}
}
else if (pressedRight)
{
this->setGeometry(rectX, rectY, rectW + offsetX, rectH);
}
else if (pressedTop)
{
int resizeH = this->height() - offsetY;
if (this->minimumHeight() <= resizeH)
{
this->setGeometry(rectX, this->y() + offsetY, rectW, resizeH);
}
}
else if (pressedBottom)
{
this->setGeometry(rectX, rectY, rectW, rectH + offsetY);
}
else if (pressedLeftTop)
{
int resizeW = this->width() - offsetX;
int resizeH = this->height() - offsetY;
if (this->minimumWidth() <= resizeW)
{
this->setGeometry(this->x() + offsetX, this->y(), resizeW, resizeH);
}
if (this->minimumHeight() <= resizeH)
{
this->setGeometry(this->x(), this->y() + offsetY, resizeW, resizeH);
}
}
else if (pressedRightTop)
{
int resizeW = rectW + offsetX;
int resizeH = this->height() - offsetY;
if (this->minimumHeight() <= resizeH)
{
this->setGeometry(this->x(), this->y() + offsetY, resizeW, resizeH);
}
}
else if (pressedLeftBottom)
{
int resizeW = this->width() - offsetX;
int resizeH = rectH + offsetY;
if (this->minimumWidth() <= resizeW)
{
this->setGeometry(this->x() + offsetX, this->y(), resizeW, resizeH);
}
if (this->minimumHeight() <= resizeH)
{
this->setGeometry(this->x(), this->y(), resizeW, resizeH);
}
}
else if (pressedRightBottom)
{
int resizeW = rectW + offsetX;
int resizeH = rectH + offsetY;
this->setGeometry(this->x(), this->y(), resizeW, resizeH);
}
}
}
else if (event->type() == QEvent::MouseButtonPress)
{
QMouseEvent *mouseEvent = dynamic_cast(event);
if(mouseEvent->button() != Qt::LeftButton)
return QObject::eventFilter(watched, event);
rectX = this->x();
rectY = this->y();
rectW = this->width();
rectH = this->height();
lastPos = mouseEvent->pos();
//判断按下的区域位置
if (rectLeft.contains(lastPos))
{
pressedLeft = true;
}
else if (rectRight.contains(lastPos))
{
pressedRight = true;
}
else if (rectTop.contains(lastPos))
{
pressedTop = true;
}
else if (rectBottom.contains(lastPos))
{
pressedBottom = true;
}
else if (rectLeftTop.contains(lastPos))
{
pressedLeftTop = true;
}
else if (rectRightTop.contains(lastPos))
{
pressedRightTop = true;
}
else if (rectLeftBottom.contains(lastPos))
{
pressedLeftBottom = true;
}
else if (rectRightBottom.contains(lastPos))
{
pressedRightBottom = true;
}
else
{
pressed = true;
}
}
else if (event->type() == QEvent::MouseMove)
{
//已用HoverMove处理
}
else if (event->type() == QEvent::MouseButtonRelease)
{
pressed = false;
pressedLeft = false;
pressedRight = false;
pressedTop = false;
pressedBottom = false;
pressedLeftTop = false;
pressedRightTop = false;
pressedLeftBottom = false;
pressedRightBottom = false;
this->setCursor(Qt::ArrowCursor);
if (m_baseWidget->m_bHelpWidhetShow)
{
switch (m_windowState) {
case DefaultWindow:
moveEnable = true;
resizeEnable = true;
break;
case LeftHalfWindow:
case RightHalfWindow:
m_lastRect = this->geometry();
this->setGeometry(m_baseWidget->m_endRect);
moveEnable = false;
resizeEnable = false;
break;
case MaximumWindow:
this->showMaximized();
moveEnable = false;
resizeEnable = false;
setZeroMargin(true);
break;
}
}
m_baseWidget->stopAnimation();
}
else if(event->type() == QEvent::MouseButtonDblClick)
{
if(this->isMaximized())
{
setZeroMargin(false);
this->showNormal();
btn_max->setStyleSheet("QPushButton { border-image: url(:/pictures/max.png); background-color: transparent; }\
QPushButton:hover { background-color: #5477a2; }\
QPushButton:pressed { background-color: #5477a2; }");
moveEnable = true;
resizeEnable = true;
}
else
{
setZeroMargin(true);
this->showMaximized();
btn_max->setStyleSheet("QPushButton { border-image: url(:/pictures/restore.png); background-color: transparent }\
QPushButton:hover { background-color: #5477a2; }\
QPushButton:pressed { background-color: #5477a2; }");
moveEnable = false;
resizeEnable = false;
}
}
return QObject::eventFilter(watched, event);
} 全套代码链接： 正在为您运送作品详情