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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 Utils = imports.utils;
const CATEGORY_LABEL_LEFT_MARGIN = 25; // pixels
const CATEGORY_LABEL_BOTTOM_MARGIN = 20; // pixels
const CATEGORY_BUTTON_RIGHT_MARGIN = 20; // pixels
const CATEGORY_BUTTON_BOTTOM_MARGIN = 20; // pixels
const CATEGORY_LABEL_BENTON_SANS_CORRECTION = 0; // pixels
const _HOVER_ARROW_URI = '/com/endlessm/wikipedia-domain/assets/category_hover_arrow.png';
GObject.ParamFlags.READWRITE = GObject.ParamFlags.READABLE | GObject.ParamFlags.WRITABLE;
const CategoryButton = new Lang.Class({
Name: 'CategoryButton',
Extends: Gtk.EventBox,
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,
'')
},
Signals: {
'clicked': {}
},
_init: function(props) {
// Get ready for property construction
this._image_uri = null;
this._category_title = null;
this._overlay = new Gtk.Overlay();
this._eventbox = new Gtk.EventBox({
expand: true
});
this._eventbox_grid = new Gtk.Grid({
orientation: Gtk.Orientation.HORIZONTAL,
hexpand: true,
valign: Gtk.Align.END
});
this._label = new Gtk.Label({
margin_left: CATEGORY_LABEL_LEFT_MARGIN,
margin_bottom: CATEGORY_LABEL_BOTTOM_MARGIN - CATEGORY_LABEL_BENTON_SANS_CORRECTION,
hexpand: true,
halign: Gtk.Align.START
});
this._arrow = new Gtk.Image({
resource: _HOVER_ARROW_URI,
margin_right: CATEGORY_BUTTON_RIGHT_MARGIN,
margin_bottom: CATEGORY_BUTTON_BOTTOM_MARGIN - CATEGORY_LABEL_BENTON_SANS_CORRECTION,
halign: Gtk.Align.END,
no_show_all: true
});
this._eventbox.add_events(Gdk.EventMask.ENTER_NOTIFY_MASK |
Gdk.EventMask.LEAVE_NOTIFY_MASK);
this._eventbox.connect('enter-notify-event',
Lang.bind(this, function(widget, event) {
this._eventbox.set_state_flags(Gtk.StateFlags.PRELIGHT, false);
this._arrow.show();
}));
this._eventbox.connect('leave-notify-event',
Lang.bind(this, function(widget, event) {
this._eventbox.unset_state_flags(Gtk.StateFlags.PRELIGHT);
this._arrow.hide();
}));
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);
this._image = new Gtk.Image({
expand: true,
halign: Gtk.Align.FILL,
valign: Gtk.Align.FILL
});
// Parent constructor sets all properties
this.parent(props);
// Put widgets together
this.add(this._overlay);
this._overlay.add(this._image);
this._eventbox_grid.add(this._label);
this._eventbox_grid.add(this._arrow);
this._eventbox.add(this._eventbox_grid);
this._overlay.add_overlay(this._eventbox);
this.show_all();
// Connect signals
this.connect('button-press-event',
Lang.bind(this, this._onButtonPress));
},
get image_uri() {
return this._image_uri;
},
set image_uri(value) {
this._image_uri = value;
if(this._image) {
let res_path = Utils.resourceUriToPath(value);
let allocation = this.get_allocation();
this._updateImage(res_path, allocation.width, allocation.height);
}
},
get category_title() {
return this._category_title;
},
set category_title(value) {
this._category_title = value;
if(this._label)
this._label.set_text(value.toUpperCase());
},
// OVERRIDES
vfunc_size_allocate: function(allocation) {
this.parent(allocation);
this._updateImage(Utils.resourceUriToPath(this._image_uri),
allocation.width, allocation.height);
},
// HANDLERS
_onButtonPress: function(widget, event) {
this.emit('clicked')
},
// PRIVATE
_updateImage: function(res_path, width, height) {
let [source_width, source_height] = [width, height];
if(width > height)
source_height = -1;
else
source_width = -1;
let source_pixbuf = GdkPixbuf.Pixbuf.new_from_resource_at_scale(res_path,
source_width, source_height, true);
let cropped_pixbuf = source_pixbuf;
if(width < source_pixbuf.width || height < source_pixbuf.height)
cropped_pixbuf = source_pixbuf.new_subpixbuf(0, 0, width, height);
this._image.set_from_pixbuf(cropped_pixbuf);
}
});
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