仿qq的错误提示透明

ErrorWidget.h

 

#ifndef ERRORWIDGET_H

#define ERRORWIDGET_H

#include <QPushButton>

#include <QToolButton>

#include  <QWidget>

#include  <QLabel>

class ErrorWidget:public QWidget

{

    Q_OBJECT

public:

   // ErrorWidget();

    ErrorWidget(QWidget *parent);

    ~ErrorWidget();

    void  setTipInfo(QString info);

    void setTipIcon(QPixmap pixmap);

public slots:

    bool closeWidget();

private:

    QToolButton*    close_button;

    QLabel *msg_label;

    QLabel * ask_label;

};

#endif // ERRORWIDGET_H

ErrorWidget.cpp文件

#include <QMessageBox>
#include <QStyle>
#include "ErrorWidget.h"
ErrorWidget::ErrorWidget(QWidget *parent)
 : QWidget(parent)
{
 int width = parent->width();

 this->resize(width, 28);
 //设置标题栏隐藏
 this->setWindowFlags(Qt::FramelessWindowHint);
 //设置背景色透明
 QPalette palette;
 QColor color(190, 230, 250);
 color.setAlphaF(0.6);
 palette.setBrush(this->backgroundRole(), color);
 this->setPalette(palette);
 //如果这个QWidget直接show，是有背景色的，但是如果放到一个父Widget中时，它就没有了效果。添加如下代码后就可以了：
 this->setAutoFillBackground(true);

//构建关闭按钮
 close_button= new QToolButton(this);
 QPixmap close_pix = style()->standardPixmap(QStyle::SP_TitleBarCloseButton);
 close_button->setIcon(close_pix);
 close_button->setStyleSheet("QToolButton{background-color: transparent;}");

 //获取主界面的宽度
 int height = this->height();
 close_button->setGeometry(width-20, 0, 20, 20);
 //设置提示图片
 msg_label = new QLabel(this);
 msg_label->setGeometry(QRect(5, 5, 20, 20));
 msg_label->setStyleSheet("background-color: transparent;");
 msg_label->setScaledContents(true);
 //设置提示信息
 ask_label = new QLabel(this);
 ask_label->setStyleSheet("background-color: transparent; color: red;");
 ask_label->setGeometry(QRect(30, 0, width - 60, height));
 ask_label->setAlignment(Qt::AlignCenter);
 close_button->setCursor(Qt::PointingHandCursor);
 QObject::connect(close_button, SIGNAL(clicked()), this, SLOT(closeWidget()));
}
ErrorWidget::~ErrorWidget()
{
// Setting::freePointer(ask_label);
 //Setting::freePointer(msg_label);
 //Setting::freePointer(close_button);
}
void ErrorWidget::setTipInfo(QString info)
{
 //设置提示信息
 ask_label->setText(info);
}
void ErrorWidget::setTipIcon(QPixmap pixmap)
{
 msg_label->setPixmap(pixmap);
}

//关闭按钮主要进行提示框的隐藏
bool ErrorWidget::closeWidget()
{

  // QMessageBox::warning(this,tr("ss"),tr("333"),QMessageBox::Yes);

 this->hide();
 return true;
}