QT全局气泡类型提示框【自动宽度、多屏自适应居中】

参考 qt 消息弹出框 ，无框，缓慢自动消失_new messagetips格式-CSDN博客 进行改进。

直接上代码。

头文件：

#pragma once#include <QObject>
#include <QWidget>class MessageTips : public QWidget
{Q_OBJECTpublic:MessageTips(QString showStr = "", QWidget* parent = nullptr);double getOpacityValue() { return m_opacity; };void setOpacityValue(double value) { m_opacity = value; };int getTextSize() { return m_textSize; };void setTextSize(int value) { m_textSize = value; };QColor getTextColor() { return m_textColor; };void setTextColor(const QColor& value) { m_textColor = value; };QColor getBackgroundColor() { return m_bgColor; };void setBackgroundColor(const QColor& value) { m_bgColor = value; };QColor getFrameColor() { return m_frameColor; };void setFrameColor(const QColor& value) { m_frameColor = value; };int getFrameSize() { return m_frameSize; };void setFrameSize(int value) { m_frameSize = value; };int getShowTime() { return m_showTime; };void setShowTime(int value) { m_showTime = value; };void setCloseTimeSpeed(int closeTime = 100, double closeSpeed = 0.1);void prepare();static void showMessageTips(QString showStr, QWidget* parent = nullptr);
protected:void paintEvent(QPaintEvent* event) override;private:QString m_showStr;double m_opacity = 0.8;int     m_textSize = 18;//显示字体大小QColor  m_textColor = QColor(255, 255, 255);//字体颜色QColor  m_bgColor = QColor(192, 192, 192);//窗体的背景色QColor  m_frameColor = QColor(211, 211, 211);//边框颜色int     m_frameSize = 2;//边框粗细大小int     m_showTime = 3500;//显示时间int     m_closeTime = 100;//关闭需要时间double  m_closeSpeed = 0.1;//窗体消失的平滑度，大小0~1
};

cpp文件：

#include "messagetips.h"
#include <QDesktopWidget>
#include <QPainter>
#include <QTimer>
#include <QApplication>
#include <QDebug>MessageTips::MessageTips(QString showStr, QWidget* parent): QWidget(parent),m_showStr(showStr)
{setWindowFlags(Qt::Window | Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::Tool);this->setAttribute(Qt::WA_TranslucentBackground); // ****这里很重要****this->setAttribute(Qt::WA_TransparentForMouseEvents, true);// 禁止鼠标事件this->setAttribute(Qt::WA_DeleteOnClose);this->setFixedHeight(50);QFont font("Arial", m_textSize, QFont::Bold);QFontMetrics fontMetrics(font);int tw = fontMetrics.width(m_showStr);if (tw > 200)this->setFixedWidth(tw + 50);elsethis->setFixedWidth(200);
}void MessageTips::prepare()
{this->setWindowOpacity(m_opacity);connect(this,SIGNAL(finished()),this,SLOT(onFinished()));QTimer* mtimer = new QTimer(this);//隐藏的定时器mtimer->setTimerType(Qt::PreciseTimer);connect(mtimer, &QTimer::timeout, this, [=]() {m_opacity = m_opacity - m_closeSpeed;if (m_opacity <= 0) {mtimer->stop();this->close();return;}elsethis->setWindowOpacity(m_opacity);    });//support for multi-screens.int scrIndex = 0;QDesktopWidget* desktop = QApplication::desktop();QWidget* acWgt = QApplication::activeWindow();if (acWgt){QPoint checkPoint(acWgt->pos().x() + acWgt->width() / 2, acWgt->pos().y() + acWgt->height() / 2);for (int i = 0; i < desktop->screenCount(); i++){if (desktop->screenGeometry(i).contains(checkPoint)){scrIndex = i;break;}}}QRect scrRect = desktop->screenGeometry(scrIndex);//设置屏幕居中显示this->move(scrRect.left() + (scrRect.width() - this->width()) / 2, scrRect.top() + (scrRect.height() - this->height()) / 2);QTimer::singleShot(m_showTime, [=]() {mtimer->start(m_closeTime); });//执行延时自动关闭
}void MessageTips::paintEvent(QPaintEvent* event)
{QPainter painter(this);painter.setBrush(QBrush(m_bgColor));//窗体的背景色painter.setPen(QPen(m_frameColor, m_frameSize));//窗体边框的颜色和笔画大小QRectF rect(0, 0, this->width(), this->height());painter.drawRoundedRect(rect, 10, 10); // round rect//文字显示居中，设置字体，大小，颜色QFont font("Arial", m_textSize, QFont::Bold);painter.setFont(font);painter.setPen(QPen(m_textColor, m_frameSize));painter.drawText(rect,Qt::AlignHCenter | Qt::AlignVCenter,m_showStr);
}//设置关闭的时间和速度，speed大小限定0~1
void MessageTips::setCloseTimeSpeed(int closeTime, double closeSpeed)
{if (closeSpeed > 0 && closeSpeed <= 1) m_closeSpeed = closeSpeed;m_closeTime = closeTime;
}void MessageTips::showMessageTips(QString showStr, QWidget* parent)
{MessageTips* mMessageTips = new MessageTips(showStr, parent);mMessageTips->setShowTime(1500);mMessageTips->prepare();mMessageTips->show();
}

调用方法：

		MessageTips::showMessageTips("OK",this);

运行效果：

运行效果与参考链接类似。