如何在QT中设计具有自定义形状的按钮

Question

我试图在Qt中设计一系列带有箭头形状的自定义按钮，但我找不到方法。我需要类似下图所示的按钮之类的东西，以便管理程序的工作流程并指导用户进行操作。 图像的文本应为“步骤1”，“步骤2”和“步骤3”。对不起，这个错误。欢迎任何帮助或建议。谢谢你的帮助。

Answer 1

头文件：

public:

void paintEvent(QPaintEvent* event); //--> drawing triangles
void createPushButtons(); 
const static int firstButtonX = 0; //--> topleft corner x value of first button 
const static int firstButtonY = 0; //--> topleft corner y value of first button 
const static int buttonWidth = 50;
const static int buttonHeight = 30;
const static int triangleWidth = 30;
QList<QColor> colors; //--> button colors

cpp文件：

我用按钮颜色填充颜色列表。

colors.append(Qt::red);
colors.append(Qt::blue);
colors.append(Qt::yellow);

并调用createPushButtons();函数来创建按钮。

void MainWindow::createPushButtons()
{
    QWidget * wdg = new QWidget(this);//--> widget contains pushButtons
    wdg->setObjectName("buttonWidget");//--> I set object name in order to catch widget and pushButtons in PaintEvent()
    setCentralWidget(wdg);//--> I add widget to app main layout

    for(int i=0; i<colors.size(); i++)//--> Button count and color count must be same.
    {
        QPushButton *btn = new QPushButton(QString::number(i)+". button",wdg);//--> create pushButtons in parent wdg
        btn->setGeometry(firstButtonX + (buttonWidth+triangleWidth)*i, firstButtonY, buttonWidth, buttonHeight);//--> I set geometry for pushButtons 

        btn->setStyleSheet(QString("background-color: %1;border-style: outset;border-width: 0px;").arg(colors.at(i).name()));//--> I change background color and clear border
    }
}

void MainWindow::paintEvent(QPaintEvent *event)
{
    QWidget *wdg = findChild<QWidget *>("buttonWidget");//--> I catch my widget
    QList<QPushButton *> buttons = wdg->findChildren < QPushButton *>();//--> I find pushButtons

    for(int i=0;i < buttons.size(); i++)
    {
        int x = buttons.at(i)->pos().x();//--> measurements for triangle
        int y = buttons.at(i)->pos().y();
        int w = buttons.at(i)->width();
        int h = buttons.at(i)->height();

        QRect r(x+w,y,triangleWidth,h);//--> I create rectangular area between pushButtons

        QPainter painter(this);
        qreal point3X = x+w + triangleWidth;//--> triangle corners
        qreal point3Y = y + h/2 ;
        qreal point1X = x+w;
        qreal point1Y = y;
        qreal point2X = x+w;
        qreal point2Y = y+h;

        QPainterPath path;
        path.moveTo (point1X, point1Y);
        path.lineTo (point2X, point2Y);
        path.lineTo (point3X, point3Y);

        painter.setPen (Qt :: NoPen);
        if(i != buttons.size()-1)//--> I paint rectangular and triangle
        {
            painter.fillRect(r, QBrush (colors.at(i+1)));
        }
        painter.fillPath (path, QBrush (colors.at(i)));
    }
}

结果是

Answer 2

您可以使用一个小部件而不是树，并在小部件的功能中绘制内容（步骤 1、步骤 2...）paintEvent()。在发生鼠标单击（或其他）事件时，您可以计算事件发生在哪个虚拟按钮上并执行相应的操作。