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