Qt 带三角的提示框

Qt 带三角的提示框

1.鼠标放在控件或者提示框本身，提示框都显示

2.鼠标离开，延时500ms消失

3.鼠标移动到另一控件上，显示另一个带三角提示框，上一个提示框立即消失

4.扣掉三角两边的区域，鼠标移入提示框不显示

5.中间可以插入widget（qwidget包含qlabel，qframe等）

#ifndef TRIANGLEDIALOG_H
#define TRIANGLEDIALOG_H
#include<QEvent>
#include <QWidget>
#include <QHBoxLayout>
#include <QVector2D>
#include <QMouseEvent>
class TriangleDialog : public QWidget
{Q_OBJECTpublic://小三角显示的起始位置，三角左点距离左边长，三角宽高，矩形宽高，内嵌，响应控件rect，parentTriangleDialog(int startXtoleft,int Triawidth, int Triaheight,int Rectwidth, int Rectheight,QWidget* widget,QRect ,QWidget *parent = nullptr);~TriangleDialog();// 设置小三角起始位置;void setStartXtoleft(int startXtoleft);// 设置小三角宽和高;void setTriangleInfo(int width, int height);void setRectInfo(int width, int height);// 设置中间区域widget;void setCenterWidget(QWidget* widget);void calculateGeometry(QRect parentRect);protected:void paintEvent(QPaintEvent *);
//    void enterEvent(QEvent *even);void leaveEvent(QEvent *even);void mouseMoveEvent(QMouseEvent *event);bool pointInTriangle(QVector2D A, QVector2D B, QVector2D C, QVector2D P);bool pointInRect(QRect parent_Rect, QVector2D P);
signals:void signal_TriangleDlgshow(int );
private slots:void Hide();void onHide();void onHide(int);void Show();private:// 小三角起始位置;int m_startX;int m_startY;int m_startXtoleft;// 小三角的宽度;int m_triangleWidth;int m_triangleHeight;int m_RectWidth;int m_RectHeight;QRect m_parentRect;QRect m_rect;QWidget *m_widget;QHBoxLayout* hMainLayout;QTimer *time;int waitTime;int margin_left;int margin_top;int margin_right;int margin_bottom;
};
#endif // WIDGET_H

#include "triangleDialog.h"
#include <QHBoxLayout>
#include <QPainter>
#include <QGraphicsDropShadowEffect>
#include <QTime>
#include <QTimer>
#define SHADOW_WIDTH 8                 // 窗口阴影宽度;
#define BORDER_RADIUS 2                 // 窗口边角的弧度;//三角左点距离左边长，三角宽高，矩形宽高，内嵌，响应控件rect，parent
TriangleDialog::TriangleDialog(int startXtoleft,int Triawidth, int Triaheight,int Rectwidth, int Rectheight,QWidget* widget,QRect parentRect,QWidget *parent): QWidget(parent)
{setWindowFlags(Qt::Widget | Qt::FramelessWindowHint | Qt::WindowSystemMenuHint | Qt::WindowStaysOnTopHint);setAttribute(Qt::WA_TranslucentBackground,true);waitTime=500;hMainLayout = new QHBoxLayout(this);margin_left=(Rectwidth-widget->geometry().width())/2;margin_top=(Rectheight-widget->geometry().height())/2+Triaheight-SHADOW_WIDTH/2;margin_right=Rectwidth-widget->geometry().width()-margin_left;margin_bottom=Rectheight-widget->geometry().height()-margin_top;hMainLayout->setContentsMargins(margin_left, margin_top,margin_right, margin_bottom);hMainLayout->setAlignment(this,Qt::AlignCenter);// 设置阴影边框;auto shadowEffect = new QGraphicsDropShadowEffect(this);shadowEffect->setOffset(0, 0);shadowEffect->setColor(Qt::gray);shadowEffect->setBlurRadius(SHADOW_WIDTH);this->setGraphicsEffect(shadowEffect);m_startX=startXtoleft+Triawidth/2;m_startY=0;setStartXtoleft(startXtoleft);setTriangleInfo(Triawidth, Triaheight);setRectInfo(Rectwidth, Rectheight);calculateGeometry(parentRect);m_parentRect=parentRect;setCenterWidget(widget);m_widget=widget;time= new QTimer();connect(time, SIGNAL(timeout()), this, SLOT(Hide()));setMouseTracking(true);
//        time->start(1000);
}TriangleDialog::~TriangleDialog()
{}// 小三角相对左边位置
void TriangleDialog::setStartXtoleft(int startXtoleft)
{m_startXtoleft = startXtoleft;
}
// 设置小三角宽高
void TriangleDialog::setTriangleInfo(int width, int height)
{m_triangleWidth = width;m_triangleHeight = height;
}// 设置矩形宽高
void TriangleDialog::setRectInfo(int width, int height)
{m_RectWidth = width;m_RectHeight = height;
}
//计算整个widget的Geometry
void TriangleDialog::calculateGeometry(QRect parentRect)
{int x = parentRect.x()+parentRect.width()/2-m_startXtoleft-m_triangleWidth/2+6;int y=parentRect.y()+parentRect.height()+12;int width = m_RectWidth;int height = m_RectHeight+m_triangleHeight;this->move(x,y);this->resize(width, height);
}
//加widget
void TriangleDialog::setCenterWidget(QWidget* widget)
{hMainLayout->addWidget(widget);
}bool TriangleDialog::pointInTriangle(QVector2D A, QVector2D B, QVector2D C, QVector2D P)
{QVector2D v0 = C - A;QVector2D v1 = B - A;QVector2D v2 = P - A;float dot00 = QVector2D::dotProduct(v0, v0);float dot01 = QVector2D::dotProduct(v0, v1);float dot02 = QVector2D::dotProduct(v0, v2);float dot11 = QVector2D::dotProduct(v1, v1);float dot12 = QVector2D::dotProduct(v1, v2);float inverDeno = 1 / (dot00 * dot11 - dot01 * dot01);float u = (dot11 * dot02 - dot01 * dot12) * inverDeno ;if (u < 0 || u > 1) // if u out of range, return directly{return false;}float v = (dot00 * dot12 - dot01 * dot02) * inverDeno ;if (v < 0 || v > 1) // if v out of range, return directly{return false;}return u + v <= 1;
}bool TriangleDialog::pointInRect(QRect parent_Rect,  QVector2D P)
{if(P.x()>parent_Rect.x()&&P.y()>parent_Rect.y()&&P.x()<parent_Rect.x()+parent_Rect.width()&&P.y()<parent_Rect.y()+parent_Rect.height()){return true;}else{return false;}
}void TriangleDialog::Hide()
{hide();
}void TriangleDialog::onHide()
{time->start(waitTime);
}
void TriangleDialog::onHide(int close_time)
{time->start(close_time);
}void TriangleDialog::Show()
{time->stop();show();emit signal_TriangleDlgshow(0);
}void TriangleDialog::paintEvent(QPaintEvent *)
{QPainter painter(this);painter.setRenderHint(QPainter::Antialiasing, true);painter.setPen(Qt::NoPen);painter.setBrush(QColor(255, 255, 255));// 小三角区域;QPolygon trianglePolygon;trianglePolygon << QPoint(m_startX , m_startY );trianglePolygon << QPoint(m_startX + m_triangleWidth / 2, m_startY + m_triangleHeight );trianglePolygon << QPoint(m_startX - m_triangleWidth / 2, m_startY + m_triangleHeight );//矩形QPainterPath drawPath;drawPath.addRoundedRect(QRect(m_startX - m_startXtoleft-m_triangleWidth / 2, m_startY + m_triangleHeight,m_RectWidth, m_RectHeight),BORDER_RADIUS, BORDER_RADIUS);// Rect + Triangle;drawPath.addPolygon(trianglePolygon);painter.drawPath(drawPath);
}void TriangleDialog::mouseMoveEvent(QMouseEvent *event)
{float P_X = event->x();float P_Y = event->y();m_rect=QRect(0,m_triangleHeight,m_RectWidth,m_RectHeight);if(pointInTriangle(QVector2D(m_startX , m_startY),QVector2D(m_startX + m_triangleWidth / 2, m_startY + m_triangleHeight),QVector2D(m_startX - m_triangleWidth / 2, m_startY + m_triangleHeight),QVector2D(P_X,P_Y))||pointInRect(m_rect, QVector2D(event->x(),event->y()))  //||m_widget->geometry().contains(QPoint(P_X,P_Y))){time->stop();this->show();}else{time->start(waitTime);}
}//void TriangleDialog::enterEvent(QEvent *even)
//{
//    time->stop();
//    this->show();
//}void TriangleDialog::leaveEvent(QEvent *even)
{time->start(waitTime);
}

使用：

Q_SIGNALS:void sigSetFileShowtriangleDlg();void sigSetFileHidetriangleDlg( );void sigQQShowtriangleDlg();void sigQQHidetriangleDlg();private slots:bool eventFilter(QObject *obj, QEvent *event);private:Ui::UpLoad *ui;TriangleDialog *setfileDialog;TriangleDialog *qqDialog;QQWidget *qqwidget;int waitTime;bool mouse_is_press;     //鼠标是否按下QPoint  mouse_move_len;  //鼠标移动事件中，移动的距离QPoint mouseStartPoint;QLabel *setfilelabel;

void UpLoad::InitTitleBar()
{ui->setfileButton->installEventFilter(this);       //安装事件过滤器ui->qqButton->installEventFilter(this);       //安装事件过滤器setfilelabel=new QLabel（"111"）;setfilelabel->setWordWrap(true);setfilelabel->setObjectName("setfilelabel");setfilelabel->setFixedSize(115,44);//三角左点距离左边长，三角宽高，矩形宽高，内嵌，响应控件rect，parentsetfileDialog=new TriangleDialog(16,16,8,147,60,setfilelabel,QRect(ui->setfileButton->geometry().x(),ui->setfileButton->geometry().y(),ui->setfileButton->geometry().width(),ui->setfileButton->geometry().height()),this);connect(this, SIGNAL(sigSetFileShowtriangleDlg()), setfileDialog, SLOT(Show()));connect(this, SIGNAL(sigSetFileHidetriangleDlg()), setfileDialog, SLOT(onHide()));setfileDialog->hide();qqwidget = new QQWidget();qqwidget->setObjectName("QQWidget");qqwidget->setStyleSheet("QQWidget#QQWidget{background-color:#FFFFFF;border:1px solid #DADADA;}");qqwidget->setWindowFlags (Qt::FramelessWindowHint| Qt::Popup);//qqDialog=new TriangleDialog(16,16,8,198,266,qqwidget,QRect(ui->qqButton->geometry().x(),ui->qqButton->geometry().y(),ui->qqButton->geometry().width(),ui->qqButton->geometry().height()),this);connect(this, SIGNAL(sigQQShowtriangleDlg()), qqDialog, SLOT(Show()));connect(this, SIGNAL(sigQQHidetriangleDlg()), qqDialog, SLOT(onHide()));connect(qqDialog, SIGNAL(signal_TriangleDlgshow(int )), setfileDialog, SLOT(onHide(int )));connect(setfileDialog, SIGNAL(signal_TriangleDlgshow(int )), qqDialog, SLOT(onHide(int )));qqDialog->hide();}
bool UpLoad::eventFilter(QObject *obj, QEvent *event)
{if(obj == ui->setfileButton) {if(event->type() == QEvent::Enter) {//QEvent::HoverEnter,QEvent::HoverLeaveemit sigSetFileShowtriangleDlg();return true;}if(event->type() == QEvent::Leave){emit sigSetFileHidetriangleDlg();return true;}return QWidget::eventFilter(obj,event);}if(obj == ui->qqButton) {if(event->type() == QEvent::Enter) {//QEvent::HoverEnter,QEvent::HoverLeaveemit sigQQShowtriangleDlg();return true;}if(event->type() == QEvent::Leave){emit sigQQHidetriangleDlg();return true;}return QWidget::eventFilter(obj,event);}
}