mirror of https://github.com/TakeV-Lambda/dino.git
88 lines
3.3 KiB
Vala
88 lines
3.3 KiB
Vala
using Gdk;
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using Gtk;
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class Dino.Ui.FixedRatioPicture : Gtk.Widget {
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public int min_width { get; set; default = -1; }
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public int max_width { get; set; default = int.MAX; }
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public int min_height { get; set; default = -1; }
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public int max_height { get; set; default = int.MAX; }
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public File file { get { return inner.file; } set { inner.file = value; } }
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public Gdk.Paintable paintable { get { return inner.paintable; } set { inner.paintable = value; } }
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#if GTK_4_8 && VALA_0_58
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public Gtk.ContentFit content_fit { get { return inner.content_fit; } set { inner.content_fit = value; } }
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#endif
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private Gtk.Picture inner = new Gtk.Picture();
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construct {
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set_css_name("picture");
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add_css_class("fixed-ratio");
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inner.insert_after(this, null);
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this.notify.connect(queue_resize);
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}
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private void measure_target_size(out int width, out int height) {
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if (width_request != -1 && height_request != -1) {
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width = width_request;
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height = height_request;
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return;
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}
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width = min_width;
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height = min_height;
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if (inner.should_layout()) {
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int child_min = 0, child_nat = 0, child_min_baseline = -1, child_nat_baseline = -1;
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inner.measure(Orientation.HORIZONTAL, -1, out child_min, out child_nat, out child_min_baseline, out child_nat_baseline);
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width = int.max(child_nat, width);
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}
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width = int.min(width, max_width);
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if (inner.should_layout()) {
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int child_min = 0, child_nat = 0, child_min_baseline = -1, child_nat_baseline = -1;
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inner.measure(Orientation.VERTICAL, width, out child_min, out child_nat, out child_min_baseline, out child_nat_baseline);
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height = int.max(child_nat, height);
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}
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if (height > max_height) {
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height = max_height;
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width = min_width;
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if (inner.should_layout()) {
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int child_min = 0, child_nat = 0, child_min_baseline = -1, child_nat_baseline = -1;
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inner.measure(Orientation.HORIZONTAL, max_height, out child_min, out child_nat, out child_min_baseline, out child_nat_baseline);
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width = int.max(child_nat, width);
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}
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width = int.min(width, max_width);
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}
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}
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public override void measure(Orientation orientation, int for_size, out int minimum, out int natural, out int minimum_baseline, out int natural_baseline) {
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minimum_baseline = -1;
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natural_baseline = -1;
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int width, height;
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measure_target_size(out width, out height);
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if (orientation == Orientation.HORIZONTAL) {
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minimum = min_width;
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natural = width;
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} else if (for_size == -1) {
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minimum = min_height;
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natural = height;
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} else {
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minimum = natural = height * for_size / width;
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}
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}
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public override void size_allocate(int width, int height, int baseline) {
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if (inner.should_layout()) {
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inner.allocate(width, height, baseline, null);
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}
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}
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public override SizeRequestMode get_request_mode() {
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return SizeRequestMode.HEIGHT_FOR_WIDTH;
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}
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public override void dispose() {
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inner.unparent();
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base.dispose();
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}
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} |