我有以下布局:
当我伸展窗户时,尺寸变成这样:
当qgridlayout大小发生变化时,有没有办法在qgridlayout中设置相同大小的小部件?
感谢。
更新
qgridlayout中的小部件:
#ifndef CVIMAGEWIDGET_H
#define CVIMAGEWIDGET_H
#include <QWidget>
#include <QImage>
#include <QPainter>
#include <QGraphicsView>
#include <QGraphicsScene>
#include <QMainWindow>
class CVImageWidget : public QGraphicsView
{
Q_OBJECT
public:
explicit CVImageWidget(QMainWindow *GUIWindow, QWidget *parent = 0);
void drawBoarder(bool flag);
void showImage(const QImage& image);
void SetCameraID(int camID);
int GetCameraID();
void closeDisplay();
~CVImageWidget();
private:
QGraphicsScene *scene_;
int camera_id_;
public slots:
void resizeEvent(QResizeEvent *event);
};
#endif // CVIMAGEWIDGET_H
CPP文件
#include "cvimagewidget.h"
#include <QMouseEvent>
#include <iostream>
CVImageWidget::CVImageWidget(QMainWindow *GUIWindow, QWidget *parent) : QGraphicsView(parent)
{
scene_ = new QGraphicsScene(parent);
scene_->setSceneRect(this->sceneRect());
this->setScene(scene_);
this->installEventFilter(GUIWindow);
this->setStyleSheet( "CVImageWidget { border-color: rgb(125,125,116); border-width: 3px; border-style: solid;}");
// this->setMinimumSize(136, 114);
camera_id_ = -1;
}
void CVImageWidget::showImage(const QImage& image) {
if(!image.isNull()){
scene_->clear();
scene_->addPixmap(QPixmap::fromImage(image));
}
}
void CVImageWidget::closeDisplay()
{
scene_->clear();
}
void CVImageWidget::SetCameraID(int camID)
{
camera_id_ = camID;
}
int CVImageWidget::GetCameraID()
{
return camera_id_;
}
void CVImageWidget::resizeEvent(QResizeEvent *event)
{
this->fitInView(this->sceneRect(), Qt::IgnoreAspectRatio);
QGraphicsView::resizeEvent(event);
}
void CVImageWidget::drawBoarder(bool flag)
{
if(flag)
{
this->setStyleSheet( "CVImageWidget { border-color: rgb(0,255,0); border-width: 3px; border-style: solid;}");
}else
{
this->setStyleSheet( "CVImageWidget { border-color: rgb(125,125,116); border-width: 3px; border-style: solid;}");
}
}
CVImageWidget::~CVImageWidget()
{
delete scene_;
}
答案 0 :(得分:4)
在布局中添加项目时,请确保为所有行和列添加延伸因子。
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QWidget widget;
QGridLayout layout;
for( int i =0 ; i < 4; i++ )
{
layout.setRowStretch( i, 1);
for ( int j = 0; j < 4; j++)
{
if( i == 0 )
{
layout.setColumnStretch( j, 1 );
}
CVImageWidget * temp = new CVImageWidget( &widget );
layout.addWidget( temp, i, j, 1, 1 );
if( i ==0 && j== 0 )
{
temp->showImage( QImage("/Users/sacp/Desktop/check.png") );
}
}
}
widget.setLayout( &layout );
widget.show();
a.exec();
return 0;
}
答案 1 :(得分:0)
将每列/列的拉伸和行拉伸设置为1
答案 2 :(得分:0)
如果您想同时为所有元素设置 ColumnStretch
和 RowStretch
,这也适用:
QGridLayout layout;
// Fill layout ...
for(int c=0; c < layout.columnCount(); c++) layout.setColumnStretch(c,1);
for(int r=0; r < layout.rowCount(); r++) layout.setRowStretch(r,1);