Wt

Hey,

The actual size for a layout-size-aware widget is communicated only in the layoutSizeChanged() methods (which you print).

The width and height of a widget merely returns the value that was set for it.

If no value is set, it is (usually) WLength::auto.

If a value is set, this is returned.

When converting a length to pixels, then it returns 0.

Regards,

koen

I am really sorry to be back here,

but I simply just don't get it :(

What I want is a visual connection between my widgets (http://redmine.webtoolkit.eu/attachments/613/Layout_with_visual_link.PNG)

but I can't figure out, what to do to get the height of the widgets in the browser :(

Maybe anyone can help me with a few Questions?

Alignment

As mentioned in the reference: "This method propagates the client-side width and height of the widget when the widget is contained by a layout manager and setLayoutSizeAware(true) was called."

So i have to put the widgets in a LayoutManager per addWidget(widget, row, col)

which itself is nested in a Widget (or widgetContainer) that has set LayoutSizeAware to true.

for example:

m_layout = new WGridLayout();              // the bottom Layout: |   | |     |
m_layout->setHorizontalSpacing(0);         //                    |   | |     |
m_layout->setVerticalSpacing(0);           //                    |   | |     |
m_layout->setContentsMargins(0, 0, 0, 0);
    SizeAwareContainerWidget *container = new SizeAwareContainerWidget(); // this container gets the layoutSizeChanged method if added
        WGridLayout *inner_layout = new WGridLayout(); // to forward the sizeChange -> add nested LayoutManager
        inner_layout->setHorizontalSpacing(0);
        inner_layout->setVerticalSpacing(0);
        inner_layout->setContentsMargins(0, 0, 0, 0);
        for (int idx_row = 0; idx_row < 3; ++idx_row)
        {
            inner_layout->addWidget(new DropDownWidget(ss.str()), idx_row, 0); // here comes my DropDownWidget from the example project above
        }
    container->setLayout(inner_layout);
m_layout->addWidget(container, 0, idx_col, 0);
this->setLayout(m_layout, AlignLeft);

This works, i get the output of layoutSizeChanged with the new width and height :)

But how can i set the aligment of the widgets?

if if try container->setLayout(inner_layout, AlignTop); (which i want) instead of setLayout without Alignment,

the layoutSizeChanged of the dropDownWidget is never called :(

How can i align my widgets, so that the horizontal space inside the container is not split between them?

(see screenshot "alignment.png")

when is layoutSizeChanged called?

In my DropDownWidget, onClick i set a nested Widget to invisible per

this->m_wContainer->setHidden(!this->m_wContainer->isHidden());

which reduces the height of my widget in the browser.

If I do so and click, the widget size changes, but onLayoutChanged gets never called.

And if i want to set the actual size in pixel IN the onLayoutChanged method:

virtual void layoutSizeChanged( int w, int h )
{
    std::cout << " size changed to: " << w << ", " << h << "\n";
    if (w != width().toPixels() || h != height().toPixels())
    {
        std::cout << " size was: " << width().toPixels() << ", " << height().toPixels() << "\n";
        resize(WLength(w, WLength::Pixel), WLength(h, WLength::Pixel));
    }
}

it gets called over and over again.

And if a react to a inside onClick Event inside my DropDownWidget as:

resize(width(), height());

parent()->resize(parent()->width(), parent()->height());

nothing happens, the onLayoutSizeChanged gets not called.

How can i force a call of onLayoutSizeChanged?

Any help is appreciated,

i am searching and try and error for days now ;(

• the incredible Leitman

Any help? Any suggestion?

Anyone?

... please? ;(

Hey,

You should add an empty container widget with stretch 1 as a last widget which will get all the remaining space.

Regards,

koen