Hi, I need to create a transparent window (full screen) with a few widgets.
The widgets’ position and dimensions are given in pixels.
I found a way to achieve that, but Idon’t like it, and would like to get some advice:
I’m using the GtkGrid, attaching 2 transparent labels: (from 0 to screen width, and from 0 to screen height)
grid.attach(lbl1, 0, 0, 1920, 1);
grid.attach(lbl2, 0, 0, 1, 1080);
then I can attach the widgets like this:
grid.attach(view1, 100, 100, 800, 600);
grid.attach(view2, 0, 100, 320, 1080);
The grid is initialized with row\col homogenous=false, spacing=1
grid.set_row_homogeneous(false);
grid.set_column_homogeneous(false);
grid.set_row_spacing(1);
grid.set_column_spacing(1);
If you need a window with transparent background, you should use CSS. The same goes for anything when you need a transparent background.
Next, if you need to position your widgets on absolute positions in screen, then a GtkFixed is appropriate.
But the general advice, because of a near infinite choice of available devices, you should try to avoid absolute positioning and reconsider the solution. We can also help if you could say what exactly is the requirement
First thx for your reply!
The requirement is to display some widgets over a transparent window.
The widget’s positions will be given to me in pixels, and the designer may ask for adjustments frequently.
For this reason I want to chose a container that excepts positions and and dimensions in pixels.
This is a terrible idea. I know some designers think everything must be pixel perfect, but that’s mostly the result of working on static images instead of working on a GUI. User interfaces, by their nature, cannot really work on pixel perfect sizing and position. Accessibility, font sizes, localisation, screen constraints: all of these break any pixel perfect layout.
At most, you can guarantee pixel perfect alignment between UI elements, and possibly margin/border/padding; you should not, though, position widgets manually to given pixel positions, or give pixel-perfect sizing.
