我正在尝试让鼠标按下事件与我创建的小部件一起使用,但每次单击小部件时,窗口都会停止响应,我必须杀死该程序。有谁知道如何解决这个问题以及如何改变颜色?
这是 .h 和.cpp文件。
.cpp文件:
#include "iconwidget.h"
#include <QPaintEvent>
#include <QPainter>
#include <QPainterPath>
iconWidget::iconWidget(QWidget *parent) :
QWidget(parent)
{
this->resize(ICON_WIDGET_WIDTH,ICON_WIDGET_HEIGHT);
pressed = false;
}
void iconWidget::paintEvent(QPaintEvent *event)
{
QRect areatopaint = event->rect();
QPainter painter(this);
QBrush brush(Qt::black);
QPointF center = this->rect().center();
QPainterPath icon;
icon.addEllipse(center,20,20);
painter.drawPath(icon);
painter.fillPath(icon, brush);
if (pressed) {
brush.setColor(Qt::red);
}
}
void iconWidget::mousePressEvent(QMouseEvent *event)
{
pressed = true;
update();
iconWidget::mousePressEvent(event);
}
.h 文件:
#define ICONWIDGET_H
#include <QWidget>
#define ICON_WIDGET_WIDTH 45
#define ICON_WIDGET_HEIGHT 45
class iconWidget : public QWidget
{
Q_OBJECT
public:
explicit iconWidget(QWidget *parent = 0);
void paintEvent(QPaintEvent *event);
bool pressed;
protected:
void mousePressEvent(QMouseEvent *event);
};
#endif // ICONWIDGET_H
你在无休止的递归中调用mousePressEvent()
。您应该更改该行:
iconWidget::mousePressEvent(event);
在您的mousePressEvent
函数中:
QWidget::mousePressEvent(event);