1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
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.wikipedia.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
// The following two are corrections because GTK 3.8 doesn't have baseline
// alignment. Remove and align properly in GTK 3.10. FIXME
const CATEGORY_LABEL_BASELINE_CORRECTION = 0; // pixels
const CATEGORY_BUTTON_BASELINE_CORRECTION = 10; // pixels
const _HOVER_ARROW_URI = '/com/endlessm/wikipedia-domain/assets/category_hover_arrow.png';
const MAIN_CATEGORY_SCREEN_WIDTH_PERCENTAGE = 0.37;
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,
''),
// 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)
},
Signals: {
'clicked': {}
},
_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._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_BASELINE_CORRECTION,
hexpand: true,
halign: Gtk.Align.START,
xalign: 0.0, // deprecated Gtk.Misc properties; necessary because
wrap: true, // "wrap" doesn't respect "halign"
width_chars: 18,
max_width_chars: 20
});
this._arrow = new Gtk.Image({
resource: _HOVER_ARROW_URI,
margin_right: CATEGORY_BUTTON_RIGHT_MARGIN,
margin_bottom: CATEGORY_BUTTON_BOTTOM_MARGIN + CATEGORY_BUTTON_BASELINE_CORRECTION,
halign: Gtk.Align.END,
valign: Gtk.Align.END,
opacity: 0
});
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;
this._update_pixbuf();
},
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) {
//Hover events/effects only trigger if the button is clickable.
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.opacity = 1.0;
}));
this._eventbox.connect('leave-notify-event',
Lang.bind(this, function(widget, event) {
this._eventbox.unset_state_flags(Gtk.StateFlags.PRELIGHT);
this._arrow.opacity = 0.0;
}));
}
},
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.margin_bottom = 0;
this._label.width_chars = 8;
this._label.max_width_chars = 9;
}
},
// OVERRIDES
vfunc_get_preferred_width: function() {
if(this._is_main_category) {
let toplevel = this.get_toplevel();
if(toplevel == null)
return this.parent();
let width = toplevel.get_allocated_width() * MAIN_CATEGORY_SCREEN_WIDTH_PERCENTAGE;
return [width, width];
} else {
return this.parent();
}
},
vfunc_size_allocate: function(allocation) {
this.parent(allocation);
this._update_pixbuf();
},
// 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 (allocation.width <= 1 || allocation.height <= 1)
return;
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);
this._image.set_from_pixbuf(this._pixbuf);
},
// HANDLERS
_onButtonPress: function(widget, event) {
this.emit('clicked')
}
});
|
