QDialog可移动可变化大小及背景设置.docx

添加定义#definePADDING2enumDirection{UP=0,DOWN=1,LEFT,RIGHT,LEFTTOP,LEFTBOTTOM,RIGHTBOTTOM,RIGHTTOP,NONE};1、在头文件中类添加函数和变量voidmouseReleaseEvent(QMouseEvent*event);voidmouseMoveEvent(QMouseEvent*event);voidmousePressEvent(QMouseEvent*event);voidregion(constQPointcursorGlobalPoint);//鼠标全局位置boolisLeftPressDown;//判断左键是否按下QPointdragPosition;//窗口移动拖动时需要记住的点Directiondir;//窗口大小改变时，记录改变方向2、在main函数中添加this-setWindowFlags(Qt::FramelessWindowHint|Qt::WindowSystemMenuHint); //隐藏Dialog标题栏this-setStyleSheet(QDialog{background-color:#FFFFFF}QDialog{border:2pxgroovegray;border-radius:10px;padding:2px4px});// 设置Dialog背景为白色，边框为圆角this-setMinimumHeight(480);this-setMinimumWidth(1250);isLeftPressDown=false;this-dir=NONE;this-setMouseTracking(true);//追踪鼠标3、实现方法voidQDataTableDlg::region(constQPointcursorGlobalPoint){QRectrect=this-rect();QPointtl=mapToGlobal(rect.topLeft());QPointrb=mapToGlobal(rect.bottomRight());intx=cursorGlobalPoint.x();inty=cursorGlobalPoint.y();if(tl.x()+PADDING=xtl.x()=xtl.y()+PADDING=ytl.y()=y){//左上角dir=LEFTTOP;this-setCursor(QCursor(Qt::SizeFDiagCursor));//设置鼠标形状}elseif(x=rb.x()-PADDINGx=rb.x()y=rb.y()-PADDINGy=rb.y()){//右下角dir=RIGHTBOTTOM;this-setCursor(QCursor(Qt::SizeFDiagCursor));}elseif(x=tl.x()+PADDINGx=tl.x()y=rb.y()-PADDINGy=rb.y()){//左下角dir=LEFTBOTTOM;this-setCursor(QCursor(Qt::SizeBDiagCursor));}elseif(x=rb.x()x=rb.x()-PADDINGy=tl.y()y=tl.y()+PADDING){//右上角dir=RIGHTTOP;this-setCursor(QCursor(Qt::SizeBDiagCursor));}elseif(x=tl.x()+PADDINGx=tl.x()){//左边dir=LEFT;this-setCursor(QCursor(Qt::SizeHorCursor));}elseif(x=rb.x()x=rb.x()-PADDING){//右边dir=RIGHT;this-setCursor(QCursor(Qt::SizeHorCursor));}elseif(y=tl.y()y=tl.y()+PADDING){//上边dir=UP;this-setCursor(QCursor(Qt::SizeVerCursor));}elseif(y=rb.y()y=rb.y()-PADDING){//下边dir=DOWN;this-setCursor(QCursor(Qt::SizeVerCursor));}else{//默认dir=NONE;this-setCursor(QCursor(Qt::ArrowCursor));}}voidQDataTableDlg::mouseReleaseEvent(QMouseEvent*event){if(event-button()==Qt::LeftButton){isLeftPressDown=false;if(dir!=NONE){this-rele