[代码] widget.cpp
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#include "widget.h"
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#include "ui_widget.h"
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#include <QtGui>
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Widget::Widget(QWidget *parent) :
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QWidget(parent),
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ui(new Ui::Widget)
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{
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ui->setupUi(this);
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createWidgets();
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createConnects();
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createEventFilter();
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}
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Widget::~Widget()
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{
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delete ui;
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delete quit;
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delete mini;
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delete restore;
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delete menu;
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delete trayIcon;
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delete fullScreenLabel;
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delete shotScreenLabel;
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}
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bool Widget::eventFilter(QObject *o, QEvent *e)
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{
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if (o != fullScreenLabel)
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{
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return Widget::eventFilter(o, e);
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}
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QMouseEvent *mouseEvent = static_cast<QMouseEvent*> (e);
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//true 鼠标左键按下且按键还未弹起
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if ((mouseEvent->button() == Qt::LeftButton)
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&& (mouseEvent->type() == QEvent::MouseButtonPress))
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{
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//鼠标左键标志位按下
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leftMousePress = true;
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//获取鼠标点
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origin = mouseEvent->pos();
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if (!rubberBand)
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{
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rubberBand = new QRubberBand(QRubberBand::Rectangle, fullScreenLabel);
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}
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rubberBand->setGeometry(QRect(origin,QSize()));
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rubberBand->show();
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return true;
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}
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//true 鼠标左键按下并拖动
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if ((mouseEvent->type() == QEvent::MouseMove)
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&& (leftMousePress))
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{
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if (rubberBand)
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{
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rubberBand->setGeometry(QRect(origin, mouseEvent->pos()).normalized());
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}
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return true;
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}
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//鼠标左键松开
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if ((mouseEvent->button() == Qt::LeftButton)
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&& (mouseEvent->type() == QEvent::MouseButtonRelease))
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{
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//鼠标标志位弹起
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leftMousePress = false;
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if (rubberBand)
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{
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//获取橡皮筋框的终止坐标
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termination = mouseEvent->pos();
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QRect rect = QRect(origin, termination);
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//根据橡皮筋框截取全屏上的信息，并将其放入shotScreenLabel
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shotScreenLabel->setPixmap(fullScreenPixmap.grabWidget(fullScreenLabel,
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rect.x(),
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rect.y(),
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rect.width(),
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rect.height()));
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//将shotScreenLabel的用户区大小固定为所截图片大小
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shotScreenLabel->setFixedSize(rect.width(), rect.height());
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shotScreenLabel->show();
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rubberBand->hide();
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fullScreenLabel->hide();
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}
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return true;
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}
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return false;
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}
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/**
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descr：实例化控件
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*/
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void Widget::createWidgets()
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{
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//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
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fullScreenLabel = new QLabel();
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shotScreenLabel = new QLabel();
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rubberBand = new QRubberBand(QRubberBand::Rectangle, fullScreenLabel);
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leftMousePress = false;
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//初始化托盘控件并组装**************************************************************
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trayIcon = new QSystemTrayIcon(QIcon(tr(":/images/heart.svg")), this);
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menu = new QMenu(this);
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restore = new QAction(tr("Restore"), this);
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mini = new QAction(tr("Mini"), this);
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quit = new QAction(tr("Quit"), this);
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menu->addAction(restore);
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menu->addAction(mini);
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menu->addAction(quit);
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trayIcon->setContextMenu(menu);
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//将托盘显示
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trayIcon->show();
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//初始化托盘控件并组装**************************************************************
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savePixmap = new QAction(tr("save"), shotScreenLabel);
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shotScreenLabel->addAction(savePixmap);
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shotScreenLabel->setContextMenuPolicy(Qt::ActionsContextMenu);
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}
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void Widget::createConnects()
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{
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//主窗口信号槽*****************************************************************
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connect(ui->pbtnShot, SIGNAL(clicked()), this, SLOT(grapWindowScreen()));
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connect(ui->pbtnShotAndMin, SIGNAL(clicked()), this, SLOT(miniWindows()));
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connect(ui->pbtnMin, SIGNAL(clicked()), this, SLOT(miniWindows()));
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connect(savePixmap, SIGNAL(triggered()), this, SLOT(saveShotPixmap()));
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//主窗口信号槽*****************************************************************
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//托盘信号槽*******************************************************************
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connect(restore, SIGNAL(triggered()), this, SLOT(restoreWindows()));
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connect(mini, SIGNAL(triggered()), this, SLOT(miniWindows()));
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connect(quit, SIGNAL(triggered()), this, SLOT(quitApplication()));
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//托盘信号槽*******************************************************************
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}
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void Widget::createEventFilter()
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{
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fullScreenLabel->installEventFilter(this);
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}
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QString Widget::getSaveShotPixmap()
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{
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return QFileDialog::getSaveFileName(shotScreenLabel,
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tr("Open Image"),
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".",
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tr("Image Files(*.JPG *.PNG)"));
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}
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void Widget::grapWindowScreen()
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{
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if (!fullScreenLabel)
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{
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fullScreenLabel = new QLabel();
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}
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//获取全屏截图fullScreenPixmap，并将其放入fullScreenLabel
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fullScreenPixmap = QPixmap::grabWindow(QApplication::desktop()->winId());
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fullScreenLabel->setPixmap(fullScreenPixmap);
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//label全屏显示
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fullScreenLabel->showFullScreen();
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}
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void Widget::miniWindows()
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{
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showMinimized();
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grapWindowScreen();
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}
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void Widget::restoreWindows()
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{
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showNormal();
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}
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void Widget::quitApplication()
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{
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qApp->quit();
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}
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void Widget::saveShotPixmap()
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{
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QString fileName = getSaveShotPixmap();
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if (!fileName.isNull())
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{
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fullScreenPixmap.save(fileName);
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}
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}