1 /*
2 Copyright (C) 2012 Johan Mattsson
3
4 This library is free software; you can redistribute it and/or modify
5 it under the terms of the GNU Lesser General Public License as
6 published by the Free Software Foundation; either version 3 of the
7 License, or (at your option) any later version.
8
9 This library is distributed in the hope that it will be useful, but
10 WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13 */
14
15 using Cairo;
16
17 namespace BirdFont {
18
19 public class ZoomTool : Tool {
20
21 int zoom_area_begin_x = -1;
22 int zoom_area_begin_y = -1;
23
24 int view_index = 0;
25 Gee.ArrayList<Tab> views;
26
27 public ZoomTool (string n) {
28 base (n, "Zoom");
29
30 views = new Gee.ArrayList<Tab> ();
31
32 select_action.connect((self) => {
33 });
34
35 select_action.connect((self) => {
36 });
37
38 press_action.connect((self, b, x, y) => {
39 if (b == 1 && KeyBindings.modifier != CTRL) {
40 zoom_area_begin_x = x;
41 zoom_area_begin_y = y;
42 }
43 });
44
45 move_action.connect((self, x, y) => {
46 Glyph g;
47
48 if (zoom_area_begin_x > 0) {
49 g = MainWindow.get_current_glyph ();
50 g.show_zoom_area (zoom_area_begin_x, zoom_area_begin_y, x, y);
51 }
52 });
53
54 release_action.connect((self, b, x, y) => {
55 Glyph g;
56
57 if (b == 1 && KeyBindings.modifier != CTRL) {
58 store_current_view ();
59
60 g = MainWindow.get_current_glyph ();
61
62 if (zoom_area_begin_x == x && zoom_area_begin_y == y) { // zero width center this point but don't zoom in
63 g.set_center (x, y);
64 } else {
65 g.set_zoom_from_area ();
66 }
67
68 zoom_area_begin_x = -1;
69 zoom_area_begin_y = -1;
70 }
71 });
72
73 draw_action.connect ((tool, cairo_context, glyph) => {
74 draw_zoom_area (cairo_context);
75 });
76 }
77
78 public void draw_zoom_area (Context cr) {
79 Glyph g = MainWindow.get_current_glyph ();
80
81 if (g.zoom_area_is_visible) {
82 cr.save ();
83 cr.set_line_width (2.0);
84 Theme.color (cr, "Selection Border");
85
86 cr.rectangle (Math.fmin (g.zoom_x1, g.zoom_x2),
87 Math.fmin (g.zoom_y1, g.zoom_y2),
88 Math.fabs (g.zoom_x1 - g.zoom_x2),
89 Math.fabs (g.zoom_y1 - g.zoom_y2));
90
91 cr.stroke ();
92 cr.restore ();
93 }
94 }
95
96 public static void zoom_full_background_image () {
97 BackgroundImage bg;
98 Glyph g = MainWindow.get_current_glyph ();
99 int x, y;
100
101 g.reset_zoom ();
102
103 if (g.get_background_image () == null) {
104 return;
105 }
106
107 bg = (!) g.get_background_image ();
108
109 x = (int) (bg.img_offset_x);
110 y = (int) (bg.img_offset_y);
111
112 g.set_zoom_area (x, y, (int) (x + bg.size_margin * bg.img_scale_x), (int) (y + bg.size_margin * bg.img_scale_y));
113 g.set_zoom_from_area ();
114 }
115
116 public void zoom_full_glyph () {
117 store_current_view ();
118
119 MainWindow.get_current_display ().zoom_min ();
120 }
121
122 /** Add an item to zoom view list. */
123 public void store_current_view () {
124 if (views.size - 1 > view_index) {
125 int i = view_index + 1;
126 while (i != views.size - 1) {
127 views.remove_at (i);
128 }
129 }
130
131 views.add (MainWindow.get_current_tab ());
132 view_index = (int) views.size - 1;
133 MainWindow.get_current_display ().store_current_view ();
134 }
135
136 /** Redo last zoom.*/
137 public void next_view () {
138 if (view_index + 1 >= (int) views.size) {
139 return;
140 }
141
142 view_index++;
143
144 MainWindow.get_current_display ().next_view ();
145 GlyphCanvas.redraw ();
146 }
147
148 /** Undo last zoom. */
149 public void previous_view () {
150 if (view_index == 0) {
151 return;
152 }
153
154 view_index--;
155
156 MainWindow.get_current_display ().restore_last_view ();
157 GlyphCanvas.redraw ();
158 }
159 }
160
161 }
162