Code

remove g++ 4.1.1 compiler errors
[inkscape.git] / src / zoom-context.cpp
1 #define __SP_ZOOM_CONTEXT_C__
3 /*
4  * Handy zooming tool
5  *
6  * Authors:
7  *   Lauris Kaplinski <lauris@kaplinski.com>
8  *   Frank Felfe <innerspace@iname.com>
9  *   bulia byak <buliabyak@users.sf.net>
10  *
11  * Copyright (C) 1999-2002 Authors
12  *
13  * Released under GNU GPL, read the file 'COPYING' for more information
14  */
17 #include <gdk/gdkkeysyms.h>
19 #include "macros.h"
20 #include "rubberband.h"
21 #include "desktop.h"
22 #include "pixmaps/cursor-zoom.xpm"
23 #include "pixmaps/cursor-zoom-out.xpm"
24 #include "prefs-utils.h"
26 #include "zoom-context.h"
28 static void sp_zoom_context_class_init(SPZoomContextClass *klass);
29 static void sp_zoom_context_init(SPZoomContext *zoom_context);
30 static void sp_zoom_context_setup(SPEventContext *ec);
31 static void sp_zoom_context_finish (SPEventContext *ec);
33 static gint sp_zoom_context_root_handler(SPEventContext *event_context, GdkEvent *event);
34 static gint sp_zoom_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
36 static SPEventContextClass *parent_class;
38 static gint xp = 0, yp = 0; // where drag started
39 static gint tolerance = 0;
40 static bool within_tolerance = false;
41 static bool escaped;
43 GType sp_zoom_context_get_type(void)
44 {
45     static GType type = 0;
47     if (!type) {
48         GTypeInfo info = {
49             sizeof(SPZoomContextClass),
50             NULL, NULL,
51             (GClassInitFunc) sp_zoom_context_class_init,
52             NULL, NULL,
53             sizeof(SPZoomContext),
54             4,
55             (GInstanceInitFunc) sp_zoom_context_init,
56             NULL,       /* value_table */
57         };
58         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPZoomContext", &info, (GTypeFlags) 0);
59     }
61     return type;
62 }
64 static void sp_zoom_context_class_init(SPZoomContextClass *klass)
65 {
66     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
68     parent_class = (SPEventContextClass*) g_type_class_peek_parent(klass);
70     event_context_class->setup = sp_zoom_context_setup;
71     event_context_class->finish = sp_zoom_context_finish;
73     event_context_class->root_handler = sp_zoom_context_root_handler;
74     event_context_class->item_handler = sp_zoom_context_item_handler;
75 }
77 static void sp_zoom_context_init (SPZoomContext *zoom_context)
78 {
79     SPEventContext *event_context = SP_EVENT_CONTEXT(zoom_context);
81     event_context->cursor_shape = cursor_zoom_xpm;
82     event_context->hot_x = 6;
83     event_context->hot_y = 6;
84 }
86 static void
87 sp_zoom_context_finish (SPEventContext *ec)
88 {
89         ec->enableGrDrag(false);
90 }
92 static void sp_zoom_context_setup(SPEventContext *ec)
93 {
94     if (prefs_get_int_attribute("tools.zoom", "selcue", 0) != 0) {
95         ec->enableSelectionCue();
96     }
97     if (prefs_get_int_attribute("tools.zoom", "gradientdrag", 0) != 0) {
98         ec->enableGrDrag();
99     }
101     if (((SPEventContextClass *) parent_class)->setup) {
102         ((SPEventContextClass *) parent_class)->setup(ec);
103     }
106 static gint sp_zoom_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
108     gint ret = FALSE;
110     if (((SPEventContextClass *) parent_class)->item_handler) {
111         ret = ((SPEventContextClass *) parent_class)->item_handler (event_context, item, event);
112     }
114     return ret;
117 static gint sp_zoom_context_root_handler(SPEventContext *event_context, GdkEvent *event)
119     SPDesktop *desktop = event_context->desktop;
120     tolerance = prefs_get_int_attribute_limited ("options.dragtolerance", "value", 0, 0, 100);
121     double const zoom_inc = prefs_get_double_attribute_limited("options.zoomincrement", "value", M_SQRT2, 1.01, 10);
123     gint ret = FALSE;
125     switch (event->type) {
126         case GDK_BUTTON_PRESS:
127             if (event->button.button == 1) {
128                 // save drag origin
129                 xp = (gint) event->button.x;
130                 yp = (gint) event->button.y;
131                 within_tolerance = true;
133                 NR::Point const button_w(event->button.x, event->button.y);
134                 NR::Point const button_dt(desktop->w2d(button_w));
135                 Inkscape::Rubberband::get()->start(desktop, button_dt);
137                 escaped = false;
139                 ret = TRUE;
140             }
141             break;
143         case GDK_MOTION_NOTIFY:
144             if (event->motion.state & GDK_BUTTON1_MASK) {
145                 ret = TRUE;
147                 if ( within_tolerance
148                      && ( abs( (gint) event->motion.x - xp ) < tolerance )
149                      && ( abs( (gint) event->motion.y - yp ) < tolerance ) ) {
150                     break; // do not drag if we're within tolerance from origin
151                 }
152                 // Once the user has moved farther than tolerance from the original location
153                 // (indicating they intend to move the object, not click), then always process the
154                 // motion notify coordinates as given (no snapping back to origin)
155                 within_tolerance = false;
157                 NR::Point const motion_w(event->motion.x, event->motion.y);
158                 NR::Point const motion_dt(desktop->w2d(motion_w));
159                 Inkscape::Rubberband::get()->move(motion_dt);
160             }
161             break;
163         case GDK_BUTTON_RELEASE:
164             if ( event->button.button == 1 ) {
165                 NR::Maybe<NR::Rect> const b = Inkscape::Rubberband::get()->getRectangle();
166                 if (b != NR::Nothing() && !within_tolerance) {
167                     desktop->set_display_area(b.assume(), 10);
168                 } else if (!escaped) {
169                     NR::Point const button_w(event->button.x, event->button.y);
170                     NR::Point const button_dt(desktop->w2d(button_w));
171                     double const zoom_rel( (event->button.state & GDK_SHIFT_MASK)
172                                            ? 1 / zoom_inc
173                                            : zoom_inc );
174                     desktop->zoom_relative_keep_point(button_dt, zoom_rel);
175                 }
176                 ret = TRUE;
177             }
178             Inkscape::Rubberband::get()->stop();
179             xp = yp = 0;
180             escaped = false;
181             break;
183         case GDK_KEY_PRESS:
184             switch (get_group0_keyval (&event->key)) {
185                 case GDK_Escape:
186                     Inkscape::Rubberband::get()->stop();
187                     xp = yp = 0;
188                     escaped = true;
189                     ret = TRUE;
190                     break;
191                 case GDK_Up:
192                 case GDK_Down:
193                 case GDK_KP_Up:
194                 case GDK_KP_Down:
195                     // prevent the zoom field from activation
196                     if (!MOD__CTRL_ONLY)
197                         ret = TRUE;
198                     break;
199                 case GDK_Shift_L:
200                 case GDK_Shift_R:
201                     event_context->cursor_shape = cursor_zoom_out_xpm;
202                     sp_event_context_update_cursor(event_context);
203                     break;
204                 default:
205                         break;
206                 }
207                 break;
208         case GDK_KEY_RELEASE:
209             switch (get_group0_keyval (&event->key)) {
210                 case GDK_Shift_L:
211                 case GDK_Shift_R:
212                     event_context->cursor_shape = cursor_zoom_xpm;
213                     sp_event_context_update_cursor(event_context);
214                     break;
215                 default:
216                     break;
217                 }
218             break;
219         default:
220             break;
221     }
223     if (!ret) {
224         if (((SPEventContextClass *) parent_class)->root_handler) {
225             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
226         }
227     }
229     return ret;
232 /*
233   Local Variables:
234   mode:c++
235   c-file-style:"stroustrup"
236   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
237   indent-tabs-mode:nil
238   fill-column:99
239   End:
240 */
241 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :