Changing image to widget

Development
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1

Hi

I’m looking for a way to load png images onto an gtk::Image for my card game. But I have two problems

  • I can’t find a way to change the image from the image widget
  • I don’t understand how to load the image from a path

I looked around but I can’t find any forum that gave me an answer

2

Do you need something like Gtk.Image.new_from_file?

3

I have the image in the Struct of window.rs, I was looking for a way to change the path of the image without creating a new widget from scratch. But if new_from_file is the only way it’s ok

(Edit: I found that gtk::Image::set_from_file() works, unfortunately tha path works only if I pass the absolute one. Is there a way to pass as a parameter the relative path of the image, like: “data/images/5-Spade.png” )

4

Is there a way to pass as a parameter the relative path of the image

Nope, but as long as the image is stored in a standard location, you can probably get the absolute path pretty easily.

5

Yes, the image is always stored into the data directory, my question was how to pass the path parameter without hardcoding it

6

Hi,

If by “data directory” you mean “/usr/share” or similar (the exact path may depend on the distro, in flatpak it will be “/app/share”), then you can get it programmatically with GLib.get_system_data_dirs

7

the data directory I meant was the directory inside the project structure that gnome-builder creates for every new project. so <Project_Path>/data/images/image.png. And I need to ask if I can use paths or I need to link the image into the binary during the build or during the export phase

8

If you need a reliable way to find the images, you can either:

  • link them directly into the binary using gresources, and set the image with Gtk.Image.set_from_resource (“resource://virtual/path/to/image.png”)
  • configure meson to install the images under get_option('prefix') / get_option('datadir') / meson.project_name() / image.png, then use GLib.get_system_data_dirs to lookup for them

The 1st option is more reliable but will increase the binary size. Typically used for small/mid-sized images that always/often need to be loaded.

The 2nd option is better suited for bigger images that only need to be loaded on demand.

9

Since It’s a card game I see the first option as more appropriate, many thanks for the answer

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