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const Gdk = imports.gi.Gdk;
const GdkPixbuf = imports.gi.GdkPixbuf;
const GObject = imports.gi.GObject;
const Gtk = imports.gi.Gtk;
const Lang = imports.lang;
const CompositeButton = imports.wikipedia.widgets.composite_button;
const Utils = imports.wikipedia.utils;
const CATEGORY_LABEL_LEFT_MARGIN_PIXELS = 5; // in addition to the 20px below
const CATEGORY_LABEL_SPACING_PIXELS = 20;
const CATEGORY_BUTTON_SIZE_PIXELS = 42;
const CATEGORY_BUTTON_RESOURCE_URI = 'resource:///com/endlessm/wikipedia-domain/assets/wikipedia-category-forward-symbolic.svg';
const CATEGORY_MIN_WIDTH = 120; // pixels
GObject.ParamFlags.READWRITE = GObject.ParamFlags.READABLE | GObject.ParamFlags.WRITABLE;
const CategoryButton = new Lang.Class({
Name: 'CategoryButton',
Extends: CompositeButton.CompositeButton,
Properties: {
// resource URI for the category's accompanying image
'image-uri': GObject.ParamSpec.string('image-uri',
'Image URI',
'Resource URI for the image file accompanying the category',
GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT,
''),
// Title of the category to display
'category-title': GObject.ParamSpec.string('category-title',
'Category title',
'Display name for the category',
GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT,
''),
// Boolean whether this button is clickable
'clickable-category': GObject.ParamSpec.boolean('clickable-category',
'Clickable Category',
'Flag whether this category button should be clickable',
GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT_ONLY,
true),
// Boolean whether this button is the main category
'is-main-category': GObject.ParamSpec.boolean('is-main-category',
'Is Main Category',
'Flag whether this category button is the main category',
GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT_ONLY,
false)
},
_init: function(props) {
// Get ready for property construction
this._image_uri = null;
this._category_title = null;
this._clickable_category = null;
this._is_main_category = null;
this._pixbuf = null;
this._inner_grid = new Gtk.Grid({
valign: Gtk.Align.END,
halign: Gtk.Align.FILL,
border_width: CATEGORY_LABEL_SPACING_PIXELS,
column_spacing: CATEGORY_LABEL_SPACING_PIXELS,
expand: true
});
this._label = new Gtk.Label({
margin_left: CATEGORY_LABEL_LEFT_MARGIN_PIXELS,
halign: Gtk.Align.START,
valign: Gtk.Align.BASELINE,
xalign: 0.0, // deprecated Gtk.Misc properties; necessary because
wrap: true, // "wrap" doesn't respect "halign"
max_width_chars: 20
});
this._arrow = new Gtk.Image({
gicon: new Gio.FileIcon({
file: Gio.File.new_for_uri(CATEGORY_BUTTON_RESOURCE_URI)
}),
pixel_size: CATEGORY_BUTTON_SIZE_PIXELS,
hexpand: true,
halign: Gtk.Align.END,
valign: Gtk.Align.END
});
this._arrow.get_style_context().add_class(Gtk.STYLE_CLASS_IMAGE);
let context = this._label.get_style_context();
context.add_class(EndlessWikipedia.STYLE_CLASS_TITLE);
context.add_class(EndlessWikipedia.STYLE_CLASS_CATEGORY);
context.add_class(EndlessWikipedia.STYLE_CLASS_FRONT_PAGE);
// Parent constructor sets all properties
this.parent(props);
// Put widgets together
this.setSensitiveChildren([this._arrow]);
this._inner_grid.add(this._label);
this._inner_grid.add(this._arrow);
this.add(this._inner_grid);
this.show_all();
},
get image_uri() {
return this._image_uri;
},
set image_uri(value) {
this._image_uri = value;
},
get category_title() {
return this._category_title;
},
set category_title(value) {
this._category_title = value;
if(this._label)
this._label.set_text(value.toUpperCase());
},
get clickable_category() {
return this._clickable_category;
},
set clickable_category(value) {
this._clickable_category = value;
if(this._clickable_category) {
this.get_style_context().add_class(EndlessWikipedia.STYLE_CLASS_CATEGORY_CLICKABLE);
} else {
this.get_style_context().remove_class(EndlessWikipedia.STYLE_CLASS_CATEGORY_CLICKABLE);
}
},
get is_main_category() {
return this._is_main_category;
},
set is_main_category(value) {
this._is_main_category = value;
if(this._is_main_category) {
let context = this._label.get_style_context();
context.add_class(EndlessWikipedia.STYLE_CLASS_MAIN);
this._label.max_width_chars = 9;
}
},
// OVERRIDES
// Sometimes our label content runs too long and the min window width can
// be greater than the screen width. So we provide our own min width for
// category buttons here, and allow the GtkLabels to be cut off if there's
// no space. We ask for width for height management so the height will be
// allocated first.
vfunc_get_request_mode: function() {
return Gtk.SizeRequestMode.WIDTH_FOR_HEIGHT;
},
vfunc_get_preferred_width_for_height: function(height) {
let natural_width = this.parent(height)[1];
return [CATEGORY_MIN_WIDTH, natural_width];
},
// Reloads the pixbuf from the gresource at the proper size if necessary
_update_pixbuf: function () {
if (this._image_uri === "" || this._image_uri === null)
return;
let allocation = this.get_allocation();
if (this._pixbuf === null || this._pixbuf.get_width() !== allocation.width ||
this._pixbuf.get_height() !== allocation.height)
this._pixbuf = Utils.load_pixbuf_cover(Utils.resourceUriToPath(this._image_uri),
allocation.width, allocation.height);
},
vfunc_draw: function (cr) {
this._update_pixbuf();
if (this._pixbuf !== null) {
Gdk.cairo_set_source_pixbuf(cr, this._pixbuf, 0, 0);
cr.paint();
}
let ret = this.parent(cr);
// We need to manually call dispose on cairo contexts. This is somewhat related to the bug listed here
// https://bugzilla.gnome.org/show_bug.cgi?id=685513 for the shell. We should see if they come up with
// a better fix in the future, i.e. fix this through gjs.
cr.$dispose();
return ret;
}
});
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