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using Gdk;
using Gtk;
using Dino.Entities;
namespace Dino.Ui {
public class PreviewFileChooserNative : Object {
private const int PREVIEW_SIZE = 180;
private const int PREVIEW_PADDING = 5;
private Gtk.FileChooserNative? chooser = null;
private Image preview_image = new Image();
public PreviewFileChooserNative(string? title, Gtk.Window? parent, FileChooserAction action, string? accept_label, string? cancel_label) {
chooser = new FileChooserNative(title, parent, action, accept_label, cancel_label);
chooser.set_preview_widget(this.preview_image);
chooser.use_preview_label = false;
chooser.preview_widget_active = false;
chooser.update_preview.connect(on_update_preview);
}
public void add_filter(owned Gtk.FileFilter filter) {
chooser.add_filter(filter);
}
public SList<File> get_files() {
return chooser.get_files();
}
public int run() {
return chooser.run();
}
public string? get_filename() {
return chooser.get_filename();
}
private void on_update_preview() {
Pixbuf preview_pixbuf = get_preview_pixbuf();
if (preview_pixbuf != null) {
int extra_space = PREVIEW_SIZE - preview_pixbuf.width;
int smaller_half = extra_space/2;
int larger_half = extra_space - smaller_half;
preview_image.set_margin_start(PREVIEW_PADDING + smaller_half);
preview_image.set_margin_end(PREVIEW_PADDING + larger_half);
preview_image.set_from_pixbuf(preview_pixbuf);
chooser.preview_widget_active = true;
} else {
chooser.preview_widget_active = false;
}
}
private Pixbuf? get_preview_pixbuf() {
string? filename = chooser.get_preview_filename();
if (filename == null) {
return null;
}
int width = 0;
int height = 0;
Gdk.PixbufFormat? format = Gdk.Pixbuf.get_file_info(filename, out width, out height);
if (format == null) {
return null;
}
try {
Gdk.Pixbuf pixbuf = new Gdk.Pixbuf.from_file_at_scale(filename, PREVIEW_SIZE, PREVIEW_SIZE, true);
pixbuf = pixbuf.apply_embedded_orientation();
return pixbuf;
} catch (Error e) {
return null;
}
}
}
}
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