最后,我们将新数字附加到显示的值后面。 voidCalculator::unaryOperatorClicked(){Button*clickedButton=qobject_cast<Button*>(sender());QStringclickedOperator=clickedButton->text();doubleoperand=display->text().toDouble();doubleresult=0.0;if(clickedOperator==tr("Sqrt")){if(operand<0.0){abortOperation(...
QWidget *widget:指向QWdget或其子类的指针,可以根据上面control的值转变(cast)成合适的类型,例如如果要绘制QSpinWidget,那么control取值为CC_SpinWidget,而widget指向一个QSpinWidget(QWidget的子类)的实例(instance)。使用这个变量可以访问QSpinWidget的成员函数和成员变量,譬如可以调用QSpinWidget的sizeHint函数获得这个...
QWidget* WidgetData::widget() { return m_pWidget; } void WidgetData::handleWidgetEvent(QEvent *event) { switch (event->type()) { default: break; case QEvent::MouseButtonPress: handleMousePressEvent(static_cast<QMouseEvent*>(event)); break; case QEvent::MouseButtonRelease: handleMouseRe...
void Calculator::digitClicked() { Button *clickedButton = qobject_cast<Button *>(sender()); int digitValue = clickedButton->text().toInt(); if (display->text() == "0" && digitValue == 0.0) return; if (waitingForOperand) { display->clear(); waitingForOperand = false; } display...
h> #include "qtcefwindow.h" #include "stdafx.h" #include <QtWidgets/QApplication> #include "simple_app.h" /** * 初始化QT以及CEF相关 */ int init_qt_cef(int& argc, char** argv) { const HINSTANCE h_instance = static_cast<HINSTANCE>(GetModuleHandle(nullptr)); const CefMainArgs main...
QCheckBox*temp = (QCheckBox *)m_table_list->cellWidget(i,0);if(state ==Qt::Checked) { temp->setCheckState(Qt::Checked); }else{ temp->setCheckState(Qt::Unchecked); } } }voidMainWindow::table_item_check_clicked() { QCheckBox*check = static_cast<QCheckBox *>(sender());intstate = ...
count()==0) ui->statusBar->showMessage("所有窗口均被关闭"); else { QLabel *lab = static_cast<QLabel*>(ui->mdiArea->currentSubWindow()->widget()); ui->statusBar->showMessage(lab->objectName()); qDebug()<<lab->text(); } } ...
FtpViewNavigationWidgetFactory() { } ~FtpViewNavigationWidgetFactory() { } Core::NavigationView createWidget(); QString displayName() const; int priority() const; QString id() const; }; #endif // FTPVIEWNAVIGATION_H 注意上一节,我们给出了Core::INavigationWidgetFactory的声明。Core::INavigati...
bool SmoothStackedWidget::eventFilter(QObject*obj,QEvent*evt){QMouseEvent*mouse=dynamic_cast<QMouseEvent*>(evt);QWidget*w=dynamic_cast<QWidget*>(obj);staticint pressPoint_x=0;//按下的坐标staticint dragPoint_x=-1;//拖动时的坐标staticqint64 pressMSec;if(mouse&&w&&animation->state()==Q...