QT自定义无边框窗口（移动控制和窗口大小调整）

#include "framelesshelper.h" int CursorPosCalculator::m_nBorderWidth = 5; int CursorPosCalculator::m_nTitleHeight = 30; /***** CursorPosCalculator *****/ CursorPosCalculator::CursorPosCalculator() { reset(); } void CursorPosCalculator::reset() { m_bOnEdges = false; m_bOnLeftEdge = false; m_bOnRightEdge = false; m_bOnTopEdge = false; m_bOnBottomEdge = false; m_bOnTopLeftEdge = false; m_bOnBottomLeftEdge = false; m_bOnTopRightEdge = false; m_bOnBottomRightEdge = false; } void CursorPosCalculator::recalculate(const QPoint &gMousePos, const QRect &frameRect) { int globalMouseX = gMousePos.x(); int globalMouseY = gMousePos.y(); int frameX = frameRect.x(); int frameY = frameRect.y(); int frameWidth = frameRect.width(); int frameHeight = frameRect.height(); m_bOnLeftEdge = (globalMouseX >= frameX && globalMouseX <= frameX + m_nBorderWidth ); m_bOnRightEdge = (globalMouseX >= frameX + frameWidth - m_nBorderWidth && globalMouseX <= frameX + frameWidth); m_bOnTopEdge = (globalMouseY >= frameY && globalMouseY <= frameY + m_nBorderWidth ); m_bOnBottomEdge = (globalMouseY >= frameY + frameHeight - m_nBorderWidth && globalMouseY <= frameY + frameHeight); m_bOnTopLeftEdge = m_bOnTopEdge && m_bOnLeftEdge; m_bOnBottomLeftEdge = m_bOnBottomEdge && m_bOnLeftEdge; m_bOnTopRightEdge = m_bOnTopEdge && m_bOnRightEdge; m_bOnBottomRightEdge = m_bOnBottomEdge && m_bOnRightEdge; m_bOnEdges = m_bOnLeftEdge || m_bOnRightEdge || m_bOnTopEdge || m_bOnBottomEdge; } /***** WidgetData *****/ WidgetData::WidgetData(FramelessHelperPrivate *_d, QWidget *pTopLevelWidget) { d = _d; m_pWidget = pTopLevelWidget; m_bLeftButtonPressed = false; m_bCursorShapeChanged = false; m_bLeftButtonTitlePressed = false; m_pRubberBand = NULL; m_windowFlags = m_pWidget->windowFlags(); m_pWidget->setMouseTracking(true); m_pWidget->setAttribute(Qt::WA_Hover, true); updateRubberBandStatus(); } WidgetData::~WidgetData() { m_pWidget->setMouseTracking(false); m_pWidget->setWindowFlags(m_windowFlags); m_pWidget->setAttribute(Qt::WA_Hover, false); delete m_pRubberBand; m_pRubberBand = NULL; } QWidget* WidgetData::widget() { return m_pWidget; } void WidgetData::handleWidgetEvent(QEvent *event) { switch (event->type()) { default: break; case QEvent::MouseButtonPress: handleMousePressEvent(static_cast(event)); break; case QEvent::MouseButtonRelease: handleMouseReleaseEvent(static_cast(event)); break; case QEvent::MouseMove: handleMouseMoveEvent(static_cast(event)); break; case QEvent::Leave: handleLeaveEvent(static_cast(event)); break; case QEvent::HoverMove: handleHoverMoveEvent(static_cast(event)); break; } } void WidgetData::updateRubberBandStatus() { if (d->m_bRubberBandOnMove || d->m_bRubberBandOnResize) { if (NULL == m_pRubberBand) { m_pRubberBand = new LinuxRubberBand(QRubberBand::Rectangle); } } else { delete m_pRubberBand; m_pRubberBand = NULL; } } void WidgetData::updateCursorShape(const QPoint &gMousePos) { if (m_pWidget->isFullScreen() || m_pWidget->isMaximized()) { if (m_bCursorShapeChanged) { m_pWidget->unsetCursor(); } return; } m_moveMousePos.recalculate(gMousePos, m_pWidget->frameGeometry()); if(m_moveMousePos.m_bOnTopLeftEdge || m_moveMousePos.m_bOnBottomRightEdge) { m_pWidget->setCursor( Qt::SizeFDiagCursor ); m_bCursorShapeChanged = true; } else if(m_moveMousePos.m_bOnTopRightEdge || m_moveMousePos.m_bOnBottomLeftEdge) { m_pWidget->setCursor( Qt::SizeBDiagCursor ); m_bCursorShapeChanged = true; } else if(m_moveMousePos.m_bOnLeftEdge || m_moveMousePos.m_bOnRightEdge) { m_pWidget->setCursor( Qt::SizeHorCursor ); m_bCursorShapeChanged = true; } else if(m_moveMousePos.m_bOnTopEdge || m_moveMousePos.m_bOnBottomEdge) { m_pWidget->setCursor( Qt::SizeVerCursor ); m_bCursorShapeChanged = true; } else { if (m_bCursorShapeChanged) { m_pWidget->unsetCursor(); m_bCursorShapeChanged = false; } } } void WidgetData::resizeWidget(const QPoint &gMousePos) { QRect origRect; if (d->m_bRubberBandOnResize) origRect = m_pRubberBand->frameGeometry(); else origRect = m_pWidget->frameGeometry(); int left = origRect.left(); int top = origRect.top(); int right = origRect.right(); int bottom = origRect.bottom(); origRect.getCoords(&left, &top, &right, &bottom); //int minWidth = m_pWidget->minimumWidth(); //int minHeight = m_pWidget->minimumHeight(); int minWidth = 40; int minHeight = 40; if (m_pressedMousePos.m_bOnTopLeftEdge) { left = gMousePos.x(); top = gMousePos.y(); } else if (m_pressedMousePos.m_bOnBottomLeftEdge) { left = gMousePos.x(); bottom = gMousePos.y(); } else if (m_pressedMousePos.m_bOnTopRightEdge) { right = gMousePos.x(); top = gMousePos.y(); } else if (m_pressedMousePos.m_bOnBottomRightEdge) { right = gMousePos.x(); bottom = gMousePos.y(); } else if (m_pressedMousePos.m_bOnLeftEdge) { left = gMousePos.x(); } else if (m_pressedMousePos.m_bOnRightEdge) { right = gMousePos.x(); } else if (m_pressedMousePos.m_bOnTopEdge) { top = gMousePos.y(); } else if (m_pressedMousePos.m_bOnBottomEdge) { bottom = gMousePos.y(); } QRect newRect(QPoint(left, top), QPoint(right, bottom)); if (newRect.isValid()) { if (minWidth > newRect.width()) { if (left != origRect.left()) newRect.setLeft(origRect.left()); else newRect.setRight(origRect.right()); } if (minHeight > newRect.height()) { if (top != origRect.top()) newRect.setTop(origRect.top()); else newRect.setBottom(origRect.bottom()); } if (d->m_bRubberBandOnResize) { m_pRubberBand->setGeometry(newRect); } else { m_pWidget->setGeometry(newRect); } } } void WidgetData::moveWidget(const QPoint& gMousePos) { if (d->m_bRubberBandOnMove) { m_pRubberBand->move(gMousePos - m_ptDragPos); } else { m_pWidget->move(gMousePos - m_ptDragPos); } } void WidgetData::handleMousePressEvent(QMouseEvent *event) { if (event->button() == Qt::LeftButton) { m_bLeftButtonPressed = true; m_bLeftButtonTitlePressed = event->pos().y() < m_moveMousePos.m_nTitleHeight; QRect frameRect = m_pWidget->frameGeometry(); QRect moveRect(frameRect.x(), frameRect.y(), frameRect.width(), 30); m_pressedMousePos.recalculate(event->globalPos(), frameRect); m_ptDragPos = event->globalPos() - frameRect.topLeft(); if (m_pressedMousePos.m_bOnEdges) { if (d->m_bRubberBandOnResize) { m_pRubberBand->setGeometry(frameRect); m_pRubberBand->show(); } } else if (d->m_bRubberBandOnMove) { if (moveRect.contains(event->globalPos())) { m_pRubberBand->setGeometry(frameRect); m_pRubberBand->show(); } } } } void WidgetData::handleMouseReleaseEvent(QMouseEvent *event) { if (event->button() == Qt::LeftButton) {