首先,我将描述我想做的事情。我正在使用QT构建一个窗口应用程序。我本来想要做的就是说,我想要一个10x10的网格布局,所有单元格都是5x5,但不必先填充网格! 我用我的Widget类填充网格,扩展了QWidget类。 Widget或QWidget在构造函数上有一个.resize(w,h)所以我虽然这会在加载时限制小部件的w和h。然而,当我向网格添加一个小部件时,它只是在中心,下一个它想要的地方!
此外,在单击QWidget :: Widget并且blClicked = true时,应该加载图像..但不是! *有关详细信息,请参阅代码。
我基本上想要实现的是this,但qgridlayout中有0个qwidgets并且从左下角到左上角逐个增加它们等等。
谢谢!
以下代码:
widget.h
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QPainter>
#include "widget.h"
#include <iostream>
class Widget : public QWidget
{
private:
Q_OBJECT
int x,y,w,h;
bool blClicked;
QImage img;
public:
explicit Widget(QWidget *parent = 0);
Widget(int x,int y,int w);
void paintEvent(QPaintEvent* event);
void mousePressEvent (QMouseEvent* event );
int getX();
int getY();
QWidget* toQWidget();
};
#endif // WIDGET_H
widget.cpp
Widget::Widget(int x, int y,int w)
{
this->x = x;
this->y = y;
this->w = w;
this->h = w;
this->resize(this->w,this->h);
blClicked = false;
img.load("car.png");
update();
}
void Widget::paintEvent(QPaintEvent *event)
{
QPainter painter(this);
painter.setWindow(x,y,w,h);
painter.drawRect(x,y,w,h);
if(blClicked)
{
std::cout << "add image" << std::endl;
painter.drawImage(x,y,img);
}
}
void Widget::mousePressEvent(QMouseEvent *event)
{
std::cout << "mouse click pressed" << std::endl;
blClicked = !blClicked;
update();
}
mainwindow.cpp
void MainWindow::on_btnCreateMap_clicked()
{
using namespace std;
if(ui->lnHeight->text() != NULL && ui->lnWidth->text() != NULL)
{
std::cout << "click" << std::endl;
try {
width = stoi(ui->lnWidth->text().toStdString());
height = stoi(ui->lnHeight->text().toStdString());
//Mapper m(height,width);
l.push_back(new Widget(2,2,10));
ui->gridWidget->addWidget(l[l.size()-1]);
for (int i = 0; i < l.size(); i++)
{
std::cout << "list size" << l.size() << std::endl;
std::cout << "address" << l[i] << std::endl;
}
}
catch (exception& e)
{
cout << "Standard exception: " << e.what() << endl;
}
}
}