Not able to create 3 similar Triangle object

alvinNew

Took RenderArea class from basicdrawing and insert into my project. Not able to create a sequence of Triangle object

////////////////////////////////////////////////////////////////////////
    RenderArea* renderArea;
//////////////////////////////////////////////////////////////
    renderArea = new RenderArea;

    RenderArea::Shape shape = RenderArea::Shape(4);
    renderArea->setShape(shape);

    Layout_page2->addWidget(renderArea);

p3c0

@alvinNew Looking at source it seems you need to use a polygon which is at index 3 and set points count to 3 in renderarea.cpp here painter.drawPolygon(points, 3);

alvinNew

Did few experiment with renderarea class, cannot get it to work. It's alright.
Any idea, How to create 3 triangle and blind it in horizontal layout?

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p3c0

@alvinNew Create a custom widget by subclassing QWidget and override paintEvent to drawing custom shapes. Following is an example:

//triangle.cpp
Triangle::Triangle(QWidget *parent) :
    QWidget(parent)
{}

void Triangle::paintEvent(QPaintEvent *e)
{
    static const QPoint points[3] = {
        QPoint(40, 80),
        QPoint(20, 10),
        QPoint(60, 10),
    };
    QPainter p(this);
    p.drawPolygon(points,3);
}

and then add it from your main code for eg. from dialog.cpp or mainwindow.cpp

//dialog.cpp
#include "triangle.h"

Triangle *a = new Triangle(this);
Triangle *b = new Triangle(this);
Triangle *c = new Triangle(this);

//add it to horizontal or vertical layout, add stretch as required.
ui->horizontalLayout->addWidget(a);
ui->horizontalLayout->addWidget(b);
ui->horizontalLayout->addWidget(c);

Try playing with the above code. Make it more dynamic by calculating points depending upon the widget size.
Hope this helps...

alvinNew

It works, i got the 3 triangle.
But when i addwidget with other layout and widget.
There is a huge spacing(row).
I want the 3 triangle directly after my page2_line, best it is joined.

=======mainwindow =======

PictureWidget *widget = new PictureWidget();

Layout_page2->addWidget(page2_line);
Layout_page2->addWidget(widget);
Layout_page2->addLayout(WordLayout);
Layout_page2->addWidget(gifmoving);

p3c0

@alvinNew How does it look now? Can post post a screenshot ?
Besides, Layouts are meant for that. They equally space widgets inside them.

alvinNew

@p3c0
in picpaste
http://picpaste.com/picpaste-bazEpaOE.jpg

want to add the page2_line in Widget, but i felt logically this isn;t correct

p3c0

@alvinNew Try setting maximum and minimum size to the widget which is above the triangle widget.