按键事件 Qt 中的按键事件是通过 QKeyEvent 类来实现的。当键盘上的按键被按下或者被释放时,键盘事件便会触发。...在帮助文档中查找 QKeyEvent 类,查找按键事件中所有的按键类型,在帮助文档中输⼊:Qt::Key,如下图: (1)单个按键 代码示例:当某个按键被按下时,输出:某个按键被按下了; 1、新建项目,...(QWidget *parent = nullptr); ~Widget(); // 声明按键按下事件 void keyPressEvent(QKeyEvent...(this); } Widget::~Widget() { delete ui; } void Widget::keyPressEvent(QKeyEvent...KeyboardModifier 中修改键的具体描述如下: 示例代码: void Widget::keyPressEvent(QKeyEvent *event) { // 组合按键
01 环境 Microsoft Visual Studio 2008 + Qt4.8.6 02 UI 03 Qt按键事件—QKeyEvent QKeyEvent是一个描述Qt键盘事件的类。...04 实现 建立一个QKeyBoard的Qt Widget工程,在头文件中声明两个函数: void keyPressEvent(QKeyEvent *event); void keyReleaseEvent...(QKeyEvent *event); 源文件中实现如下: void QKeyBoard::keyPressEvent(QKeyEvent *event){ switch(event->key()).../*default: this->ui.textEdit->append("KeyEvent");*/ } } void QKeyBoard::keyReleaseEvent(QKeyEvent
1 if (obj == ui.edit_m_relative) { if (event->type() == QEvent::KeyPress) { QKeyEvent...*keyEvent = static_cast(event); if (keyEvent->key() == Qt::Key_Tab)...2 if (obj == ui.edit_m_absolute) { if (event->type() == QEvent::KeyPress) { QKeyEvent...*keyEvent = static_cast(event); if (keyEvent->key() == Qt::Key_Tab)...*keyEvent = static_cast(event); if (keyEvent->key() == Qt::Key_Tab)
QKeyEvent keyPress(QEvent::KeyPress, key, Qt::NoModifier, value); QKeyEvent keyRelease(QEvent::KeyRelease
w.show(); return app.exec(); } #ifndef CWIDGET_H #define CWIDGET_H #include #include <QKeyEvent...public QWidget { Q_OBJECT public: explicit CWidget(QWidget *parent = 0); void keyPressEvent(QKeyEvent...*); void keyReleaseEvent(QKeyEvent *); // 定时器消息,需要 startTimer 才会触发 // 在需要的地方调用 startTimer...timerId_1 = startTimer(1000); timerId_2 = startTimer(1000); } void CWidget::keyPressEvent(QKeyEvent...// 按下alt后,根据 timerId 关闭一个定时器 killTimer(timerId_1); } } void CWidget::keyReleaseEvent(QKeyEvent
官方文档上提到一个QKeyEvent的成员函数isAutoRepeat: 可以看到,当event来自于auto-repeating key,isAutoRepeat返回true;当event事件来自于最初的按键...void QKeyBoard::keyPressEvent(QKeyEvent *event){ switch(event->key()){ case Qt::Key_Tab:...03 问题解决 在真正按键和松键事件触发时,加上对isAutoRepeat返回值的判断,具体判断如第2节总结所言,示例代码如下: void QKeyBoard::keyPressEvent(QKeyEvent.../*default: this->ui.textEdit->append("KeyEvent");*/ } } void QKeyBoard::keyReleaseEvent(QKeyEvent
initializeGL(); virtual void resizeGL(int w, int h); virtual void paintGL(); void keyPressEvent( QKeyEvent...*e ); }; .cpp部分: #include MyGLWidget::MyGLWidget(QWidget *parent) : QOpenGLWidget(parent...使用三种颜色的分量可配置出超过1600万种不同的颜色 glClear(GL_COLOR_BUFFER_BIT); //清空屏幕的颜色缓冲 } void MyGLWidget::keyPressEvent(QKeyEvent
一些事件,例如QMouseEvent和QKeyEvent ,来自窗口系统。 一些,例如QTimerEvent ,来自其他来源;有些来自应用程序本身,如自定义事件等。 3....事件类型 大多数事件类型都有特殊的类,尤其是QResizeEvent , QPaintEvent , QMouseEvent , QKeyEvent和QCloseEvent 。...event(QEvent *event){ if (event->type() == QEvent::KeyPress) { //无法捕获,被窗口焦点优先捕获 QKeyEvent...*ke = static_cast(event); if (ke->key() == Qt::Key_Tab) { // special
{ Q_OBJECT public: explicit QMyLineEdit(QWidget *parent = 0); void keyReleaseEvent( QKeyEvent...QMyLineEdit line; public: explicit QMyWidget(QWidget *parent = 0); void keyReleaseEvent( QKeyEvent...QMyWidget(QWidget *parent) : QWidget(parent), line(this) { } void QMyWidget::keyReleaseEvent( QKeyEvent...if (obj == textEdit) { if (event->type() == QEvent::KeyPress) { QKeyEvent...*keyEvent = static_cast(event); qDebug() key
02 头文件设计 增加成员变量axisNum,用于记录用户想要控制哪个轴(1、2、3、4、5、6) 声明Qt按键事件函数 //按键事件 void keyPressEvent(QKeyEvent...*event); void keyReleaseEvent(QKeyEvent *event); //用户按键控制轴号 int axisNum; 03 实现 在Qt键盘事件...基于上述考虑,keyPressEvent和keyReleaseEvent 实现如下: void Robot::keyPressEvent(QKeyEvent *event) { double curValue...default: break; } break; } } } void Robot::keyReleaseEvent(QKeyEvent
要包含头文件#include 1.1效果 ?...2.代码 2.1.按键响应代码 在头文件中声明 protected: //keyboard void keyPressEvent(QKeyEvent *event); void keyReleaseEvent...(QKeyEvent *event); 在源文件中实现 // 键盘按下事件 void check_keyboard_mouse::keyPressEvent(QKeyEvent *event) {...keyReleaseEvent()函数 而keyPressEvent()函数触发不了 */ // 按键释放事件 void check_keyboard_mouse::keyReleaseEvent(QKeyEvent...QString check_keyboard_mouse::getKeyValue(QKeyEvent* event) { int keyValue;//数值表示意义 QString keyValue_Hex
生成键盘事件 void KeyBoard::buttonClicked(int key) { QKeyEvent *keyPressEvent = NULL; if ((key ==...Qt::Key_Enter) || (key == Qt::Key_Backspace)) keyPressEvent = new QKeyEvent(QEvent::KeyPress,...key, Qt::NoModifier); else keyPressEvent = new QKeyEvent
mouseMoveEvent(QMouseEvent *event); void mouseReleaseEvent(QMouseEvent *event); void keyPressEvent(QKeyEvent...void ChartView::keyPressEvent(QKeyEvent *event) { switch (event->key()) { case Qt::Key_Plus:
QGraphicsScene> #include #include #include #include <QKeyEvent...QGraphicsTextItem::mouseDoubleClickEvent(event); } } void keyPressEvent(QKeyEvent
parent = 0); void link_cpu(CHIP8 &chip8); int keymap(unsigned char k); void keyPressEvent(QKeyEvent...event); int timediff_ms(struct timeval *end, struct timeval *start); void keyReleaseEvent(QKeyEvent...(void *) cpu.screen); glPixelZoom(2, 2); } //按键按下事件 void Monitor64x32::keyPressEvent(QKeyEvent...return 0xf; default: return -1; } } //按键释放事件 void Monitor64x32::keyReleaseEvent(QKeyEvent
具体实现代码: # 重写键盘事件 def keyPressEvent(self, QKeyEvent): if self.open_keyboard_flag is True: #...当键盘事件为真的是才有键盘事件监控 if QKeyEvent.key() == Qt.Key_S: self.label_show.setCursor(Qt.CrossCursor)...切换游标为十字型 self.label_show.open_mouse_flag = True self.label_show.draw_roi_flag = True if QKeyEvent.key
this, SLOT(onPushButton())); } void Widget::onPushButton() { int key = Qt::Key_Delete ; QKeyEvent...:KeyPress,key,Qt::NoModifier); QApplication::sendEvent(&edit,&EventPress); //发送键盘按下事件 QKeyEvent
receiver) return; QKeyEvent keyPress(QEvent::KeyPress, key, Qt::NoModifier, value);...QKeyEvent keyRelease(QEvent::KeyRelease, key, Qt::NoModifier, value); QApplication::sendEvent
事件处理 QT中,事件作为一个对象,继承自QEvent类,常见的有键盘事件QKeyEvent、鼠标事件QMouseEvent和定时器事件QTimerEvent等。...keyevent.h #ifndef KEYEVENT_H #define KEYEVENT_H #include #include namespace Ui...explicit KeyEvent(QWidget *parent = 0); ~KeyEvent(); void drawPix(); void keyPressEvent(QKeyEvent...painter.drawImage(QPoint(m_startX,m_startY),m_image); painter.end(); } void KeyEvent::keyPressEvent(QKeyEvent
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