用qt实现类似qq截图的工具代码.doc

[文件] ShotPixmarar ~ 6KB 下载(385) [代码] widget.cpp #include widget.h #include ui_widget.h #include QtGui Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) { ui-setupUi(this); createWidgets(); createConnects(); createEventFilter(); } Widget::~Widget() { delete ui; delete quit; delete mini; delete restore; delete menu; delete trayIcon; delete fullScreenLabel; delete shotScreenLabel; } bool Widget::eventFilter(QObject *o, QEvent *e) { if (o != fullScreenLabel) { return Widget::eventFilter(o, e); } QMouseEvent *mouseEvent = static_castQMouseEvent* (e); //true 鼠标左键按下且按键还未弹起 if ((mouseEvent-button() == Qt::LeftButton) (mouseEvent-type() == QEvent::MouseButtonPress)) { //鼠标左键标志位按下 leftMousePress = true; //获取鼠标点 origin = mouseEvent-pos(); if (!rubberBand) { rubberBand = new QRubberBand(QRubberBand::Rectangle, fullScreenLabel); } rubberBand-setGeometry(QRect(origin,QSize())); rubberBand-show(); return true; } //true 鼠标左键按下并拖动 if ((mouseEvent-type() == QEvent::MouseMove) (leftMousePress)) { if (rubberBand) { rubberBand-setGeometry(QRect(origin, mouseEvent-pos()).normalized()); } return true; } //鼠标左键松开 if ((mouseEvent-button() == Qt::LeftButton) (mouseEvent-type() == QEvent::MouseButtonRelease)) { //鼠标标志位弹起 leftMousePress = false; if (rubberBand) { //获取橡皮筋框的终止坐标 termination = mouseEvent-pos(); QRect rect = QRect(origin, termination); //根据橡皮筋框截取全屏上的信息，并将其放入shotScreenLabel shotScreenLabel-setPixmap(fullScreenPixmap.grabWidget(fullScreenLabel, rect.x(), rect.y(), rect.width(), rect.height())); //将shotScreenLabel的用户区大小固定为所截图片大小 shotScreenLabel-setFixedSize(rect.width(), rect.height()); shotScreenLabel-show(); rubberBand-hide(); fullScreenLabel-hide(); } return true; } return false; } /** descr：实例化控件 */ void Widget::createWidgets() { //两个QLabel的父控件不能为this，否则截图信息会现在是主窗口中，无法正确显示 fullScreenLabel = new QLabel(); shotScreen