我创建了一个小部件类。此类将维护 QFrame 类型的 child_1(QWidget 类型)以及 QGridLayout 类型的 child_2。child_2 会将 child_1 添加到自身。child_1 将有一个 QGridLayout 类型的孩子,最终 QGridLayout 将有一些按钮。
*我无法根据父小部件的调整来调整QFrame子(child_1)的大小。另外,我正在尝试设置父 QFrame 子的大小。即使这没有发生。我尝试过使用 setFrameRect()、setGeometry() 和 resize() 方法。我已经实现了 evenhandler resizeEvent(QResizeEvent event)。但是在应用程序运行时,我正在尝试调整小部件的大小,但我看到日志没有打印。
主文件
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Widget w;
w.show();
return a.exec();
}
小部件.h
namespace Ui {
class Widget;
}
class Widget : public QWidget
{
Q_OBJECT
public:
explicit Widget(QWidget *parent = 0);
~Widget();
private:
Ui::Widget *ui;
QGridLayout* p_mPanelLayout; // Instance of QGridLayout.
FrameDemo* framePtr;
};
小部件.cpp
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
p_mPanelLayout = new QGridLayout(this);
framePtr = new FrameDemo(this);
framePtr->createPushButtonUtility();
p_mPanelLayout->addWidget(framePtr, 0, 0, Qt::AlignCenter);
}
Widget::~Widget()
{
delete ui;
}
框架演示.h
#define LOG(message){\
qDebug()<< __LINE__<<__FUNCTION__<<message<<"\n";\
}
class FrameDemo : public QFrame
{
Q_OBJECT
public:
FrameDemo(QWidget *parent = 0);
void createPushButtonUtility();
private:
QGridLayout* m_pLayout;
protected:
void resizeEvent(QResizeEvent * event);
};
框架演示.cpp
FrameDemo::FrameDemo(QWidget *parent):QFrame(parent)
{
m_pLayout = new QGridLayout(this);
// m_pLayout->setRowStretch(0, parent->width());
QRect defaultRect = rect();
QSize currentSize = size();
LOG(currentSize.height())
LOG(currentSize.width())
int xP1 = 0;
int yP1 = 0;
int xP2 = 0;
int yP2 = 0;
defaultRect.getCoords(&xP1, &yP1, &xP2, &yP2);
LOG(xP1)
LOG(yP1)
LOG(xP2)
LOG(yP2)
LOG(parent->width())
LOG(defaultRect.height())
// QRect newRect = QRect(xP1,yP1,parent->width(),defaultRect.height());
// QRect newRect = QRect(0, 0, 0, defaultRect.height());
// setFrameRect(newRect);
resize(QSize(400, currentSize.height()));
setFrameShape(QFrame::Box);
// setGeometry(0, 0, parent->width(), defaultRect.height());
}
void FrameDemo::createPushButtonUtility()
{
QPushButton *readButton = new QPushButton("Read", this);
m_pLayout->addWidget(readButton, 0, 0, Qt::AlignCenter);
QPushButton *writeButton = new QPushButton("Write", this);
m_pLayout->addWidget(writeButton, 0, 1, Qt::AlignCenter);
QPushButton *updateButton = new QPushButton("Update", this);
m_pLayout->addWidget(updateButton, 0, 2, Qt::AlignCenter);
}
void FrameDemo::resizeEvent(QResizeEvent *event)
{
LOG("resize")
}