石家庄网站推广专业,建设留学网站,旭泽建站,网建贷款下列代码定义了一个窗口#xff0c;窗口采用竖直布局#xff1a;一个按钮及一个label。按下按钮时候#xff0c;窗口扩张#xff0c;显示label控件。再次按下按钮时#xff0c;窗口收缩#xff0c;隐藏label控件。 详细代码如下#xff1a; #include QApplication窗口采用竖直布局一个按钮及一个label。按下按钮时候窗口扩张显示label控件。再次按下按钮时窗口收缩隐藏label控件。 详细代码如下 #include QApplication
#include QWidget
#include QHBoxLayout
#include QTimer
#include QLabel
#include QVBoxLayout
#include QPushButton
#include QDebugclass MyWidget : public QWidget
{//Q_OBJECT
public:MyWidget(QWidget* parent nullptr) : QWidget(parent), m_bD(true){setFixedWidth(100);// setStyleSheet(background-color:red;);m_vLayout new QVBoxLayout();m_vLayout-setContentsMargins(0, 0, 0, 0);setLayout(m_vLayout);m_hLayout new QHBoxLayout();m_pushBtn new QPushButton(d!, this);m_pushBtn-setFixedSize(20, 20);m_hLayout-addStretch(1);m_hLayout-addWidget(m_pushBtn);m_vLayout-addLayout(m_hLayout);m_label new QLabel(this);m_label-setText(just a label text!);m_vLayout-addWidget(m_label);m_vLayout-addStretch(1);//setFixedHeight(m_pushBtn-height() m_label-height());setFixedHeight(m_pushBtn-height());m_label-hide();QObject::connect(m_pushBtn, QPushButton::clicked, []() {if (m_bD){//m_vLayout-addWidget(m_label);m_label-show();m_pushBtn-setText(d!);qDebug() push btn h: m_pushBtn-height() , label h: m_label-height();setFixedHeight(m_pushBtn-height() m_label-height());m_bD false;}else{m_bD true;//m_vLayout-removeWidget(m_label);m_label-hide();m_pushBtn-setText(p!);qDebug() push btn h: m_pushBtn-height() , label h: m_label-height();setFixedHeight(m_pushBtn-height());}});}private:QHBoxLayout* m_hLayout;QPushButton* m_pushBtn;bool m_bD;QVBoxLayout* m_vLayout;QLabel *m_label;
};int main(int argc, char** argv)
{QApplication app(argc, argv);MyWidget w;w.show();return app.exec();
}页面效果如下
