I am trying to desing in Qt a sequence of custom buttons with arrow shape but I could not find the way. I need something like the buttons that you can see in the next picture in order to manage the workflow of my program and guide the user through it.
The texts of the images should be "Step 1", "Step 2" and "Step 3". Sorry for the mistake.
Any help or suggestion is welcome.
Thanks for your help.
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);
并打电话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
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