qt截屏输出为gif图片的示例程序

#pragma execution_character_set("utf-8") #include "gifwidget.h" #include "qmutex.h" #include "qlabel.h" #include "qlineedit.h" #include "qpushbutton.h" #include "qlayout.h" #include "qpainter.h" #include "qevent.h" #include "qstyle.h" #include "qpixmap.h" #include "qtimer.h" #include "qdatetime.h" #include "qapplication.h" #include "qdesktopservices.h" #include "qfiledialog.h" #include "qurl.h" #include "qtextcodec.h" #include "qdebug.h" #if (QT_VERSION >= QT_VERSION_CHECK(5,0,0)) #include "qscreen.h" #define deskGeometry qApp->primaryScreen()->geometry() #define deskGeometry2 qApp->primaryScreen()->availableGeometry() #else #include "qdesktopwidget.h" #define deskGeometry qApp->desktop()->geometry() #define deskGeometry2 qApp->desktop()->availableGeometry() #endif QScopedPointer<GifWidget> GifWidget::self; GifWidget *GifWidget::Instance() { if (self.isNull()) { static QMutex mutex; QMutexLocker locker(&mutex); if (self.isNull()) { self.reset(new GifWidget); } } return self.data(); } GifWidget::GifWidget(QWidget *parent) : QDialog(parent) { this->initControl(); this->initForm(); } bool GifWidget::eventFilter(QObject *watched, QEvent *event) { static QPoint mousePoint; static bool mousePressed = false; QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event); if (mouseEvent->type() == QEvent::MouseButtonPress) { if (mouseEvent->button() == Qt::LeftButton) { mousePressed = true; mousePoint = mouseEvent->globalPos() - this->pos(); return true; } } else if (mouseEvent->type() == QEvent::MouseButtonRelease) { mousePressed = false; return true; } else if (mouseEvent->type() == QEvent::MouseMove) { if (mousePressed) { this->move(mouseEvent->globalPos() - mousePoint); return true; } } return QWidget::eventFilter(watched, event); } void GifWidget::resizeEvent(QResizeEvent *e) { //拉动右下角改变大小自动赋值 txtWidth->setText(QString::number(widgetMain->width())); txtHeight->setText(QString::number(widgetMain->height())); QDialog::resizeEvent(e); } void GifWidget::paintEvent(QPaintEvent *) { int width = txtWidth->text().toInt(); int height = txtHeight->text().toInt(); rectGif = QRect(borderWidth, widgetTop->height(), width - (borderWidth * 2), height); QPainter painter(this); painter.setPen(Qt::NoPen); painter.setBrush(bgColor); painter.drawRoundedRect(this->rect(), 5, 5); painter.setCompositionMode(QPainter::CompositionMode_Clear); painter.fillRect(rectGif, Qt::SolidPattern); } int GifWidget::getBorderWidth() const { return this->borderWidth; } QColor GifWidget::getBgColor() const { return this->bgColor; } void GifWidget::initControl() { this->setObjectName("GifWidget"); this->resize(800, 600); this->setSizeGripEnabled(true); QVBoxLayout *verticalLayout = new QVBoxLayout(this); verticalLayout->setSpacing(0); verticalLayout->setContentsMargins(11, 11, 11, 11); verticalLayout->setObjectName("verticalLayout"); verticalLayout->setContentsMargins(0, 0, 0, 0); widgetTop = new QWidget(this); widgetTop->setObjectName("widgetTop"); widgetTop->setMinimumSize(QSize(0, 35)); widgetTop->setMaximumSize(QSize(16777215, 35)); QHBoxLayout *layoutTop = new QHBoxLayout(widgetTop); layoutTop->setSpacing(0); layoutTop->setContentsMargins(11, 11, 11, 11); layoutTop->setObjectName("layoutTop"); layoutTop->setContentsMargins(0, 0, 0, 0); QPushButton *btnIcon = new QPushButton(widgetTop); btnIcon->setObjectName("btnIcon"); QSizePolicy sizePolicy(QSizePolicy::Minimum, QSizePolicy::Expanding); sizePolicy.setHorizontalStretch(0); sizePolicy.setVerticalStretch(0); sizePolicy.setHeightForWidth(btnIcon->sizePolicy().hasHeightForWidth()); btnIcon->setSizePolicy(sizePolicy); btnIcon->setMinimumSize(QSize(35, 0)); btnIcon->setFlat(true); layoutTop->addWidget(btnIcon); QLabel *labTitle = new QLabel(widgetTop); labTitle->setObjectName("labTitle"); layoutTop->addWidget(labTitle); QSpacerItem *horizontalSpacer = new QSpacerItem(87, 20, QSizePolicy::Expanding, QSizePolicy::Minimum); layoutTop->addItem(horizontalSpacer); QPushButton *btnClose = new QPushButton(widgetTop); btnClose->setObjectName("btnClose"); sizePolicy.setHeightForWidth(btnClose->sizePolicy().hasHeightForWidth()); btnClose->setSizePolicy(sizePolicy); btnClose->setMinimumSize(QSize(35, 0)); btnClose->setFocusPolicy(Qt::NoFocus); btnClose->setFlat(true); layoutTop->addWidget(btnClose); verticalLayout->addWidget(widgetTop); widgetMain = new QWidget(this); widgetMain->setObjectName("widgetMain"); QSizePolicy sizePolicy1(QSizePolicy::Preferred, QSizePolicy::Expanding); sizePolicy1.setHorizontalStretch(0); sizePolicy1.setVerticalStretch(0); sizePolicy1.setHeightForWidth(widgetMain->sizePolicy().hasHeightForWidth()); widgetMain->setSizePolicy(sizePolicy1); verticalLayout->addWidget(widgetMain); widgetBottom = new QWidget(this); widgetBottom->setObjectName("widgetBottom"); widgetBottom->setMinimumSize(QSize(0, 45)); widgetBottom->setMaximumSize(QSize(16777215, 45)); QHBoxLayout *layoutBottom = new QHBoxLayout(widgetBottom); layoutBottom->setSpacing(6); layoutBottom->setContentsMargins(11, 11, 11, 11); layoutBottom->setObjectName("layoutBottom"); layoutBottom->setContentsMargins(9, 9, -1, -1); QLabel *labFps = new QLabel(widgetBottom); labFps->setObjectName("labFps"); layoutBottom->addWidget(labFps); txtFps = new QLineEdit(widgetBottom); txtFps->setObjectName("txtFps"); txtFps->setMaximumSize(QSize(50, 16777215)); txtFps->setAlignment(Qt::AlignCenter); layoutBottom->addWidget(txtFps); QLabel *labWidth = new QLabel(widgetBottom); labWidth->setObjectName("labWidth"); layoutBottom->addWidget(labWidth); txtWidth = new QLineEdit(widgetBottom); txtWidth->setObjectName("txtWidth"); txtWidth->setEnabled(true); txtWidth->setMaximumSize(QSize(50, 16777215)); txtWidth->setAlignment(Qt::AlignCenter); layoutBottom->addWidget(txtWidth); QLabel *labHeight = new QLabel(widgetBottom); labHeight->setObjectName("labHeight"); layoutBottom->addWidget(labHeight); txtHeight = new QLineEdit(widgetBottom); txtHeight->setObjectName("txtHeight"); txtHeight->setEnabled(true); txtHeight->setMaximumSize(QSize(50, 16777215)); txtHeight->setAlignment(Qt::AlignCenter); layoutBottom->addWidget(txtHeight); labStatus = new QLabel(widgetBottom); labStatus->setObjectName("labStatus"); QSizePolicy sizePolicy2(QSizePolicy::Expanding, QSizePolicy::Preferred); sizePolicy2.setHorizontalStretch(0); sizePolicy2.setVerticalStretch(0); sizePolicy2.setHeightForWidth(labStatus->sizePolicy().hasHeightForWidth()); labStatus->setSizePolicy(sizePolicy2); labStatus->setAlignment(Qt::AlignCenter); layoutBottom->addWidget(labStatus); btnStart = new QPushButton(widgetBottom); btnStart->setObjectName("btnStart"); sizePolicy.setHeightForWidth(btnStart->sizePolicy().hasHeightForWidth()); btnStart->setSizePolicy(sizePolicy); layoutBottom->addWidget(btnStart); verticalLayout->addWidget(widgetBottom); labTitle->setText("GIF录屏工具(QQ:517216493)"); labFps->setText("帧率"); labWidth->setText("宽度"); labHeight->setText("高度"); btnStart->setText("开始"); this->setWindowTitle(labTitle->text()); btnIcon->setIcon(style()->standardIcon(QStyle::SP_ComputerIcon)); btnClose->setIcon(style()->standardIcon(QStyle::SP_TitleBarCloseButton)); connect(btnClose, SIGNAL(clicked(bool)), this, SLOT(closeAll())); connect(btnStart, SIGNAL(clicked(bool)), this, SLOT(record