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Bug fix in GetLabelFromText
[wxWidgets.git] / src / gtk1 / scrolbar.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: scrolbar.cpp
3 // Purpose:
4 // Author: Robert Roebling
5 // Id: $Id$
6 // Copyright: (c) 1998 Robert Roebling
7 // Licence: wxWindows licence
8 /////////////////////////////////////////////////////////////////////////////
9
10
11 #ifdef __GNUG__
12 #pragma implementation "scrolbar.h"
13 #endif
14
15 #include "wx/scrolbar.h"
16
17 #if wxUSE_SCROLLBAR
18
19 #include "wx/utils.h"
20
21 #include <math.h>
22
23 #include <gdk/gdk.h>
24 #include <gtk/gtk.h>
25
26 //-----------------------------------------------------------------------------
27 // idle system
28 //-----------------------------------------------------------------------------
29
30 extern void wxapp_install_idle_handler();
31 extern bool g_isIdle;
32
33 //-----------------------------------------------------------------------------
34 // data
35 //-----------------------------------------------------------------------------
36
37 extern bool g_blockEventsOnDrag;
38 extern bool g_blockEventsOnScroll;
39
40 static const float sensitivity = 0.02;
41
42 //-----------------------------------------------------------------------------
43 // "value_changed"
44 //-----------------------------------------------------------------------------
45
46 static void gtk_scrollbar_callback( GtkAdjustment *adjust, wxScrollBar *win )
47 {
48 if (g_isIdle) wxapp_install_idle_handler();
49
50 if (!win->m_hasVMT) return;
51 if (g_blockEventsOnDrag) return;
52
53 float diff = adjust->value - win->m_oldPos;
54 if (fabs(diff) < sensitivity) return;
55
56 win->m_oldPos = adjust->value;
57
58 GtkRange *range = GTK_RANGE( win->m_widget );
59
60 wxEventType command = wxEVT_SCROLL_THUMBTRACK;
61 if (range->scroll_type == GTK_SCROLL_STEP_BACKWARD) command = wxEVT_SCROLL_LINEUP;
62 else if (range->scroll_type == GTK_SCROLL_STEP_FORWARD) command = wxEVT_SCROLL_LINEDOWN;
63 else if (range->scroll_type == GTK_SCROLL_PAGE_BACKWARD) command = wxEVT_SCROLL_PAGEUP;
64 else if (range->scroll_type == GTK_SCROLL_PAGE_FORWARD) command = wxEVT_SCROLL_PAGEDOWN;
65
66 int value = (int)ceil(adjust->value);
67
68 int orient = win->HasFlag(wxSB_VERTICAL) ? wxVERTICAL : wxHORIZONTAL;
69
70 wxScrollEvent event( command, win->GetId(), value, orient );
71 event.SetEventObject( win );
72 win->GetEventHandler()->ProcessEvent( event );
73
74 /*
75 wxCommandEvent cevent( wxEVT_COMMAND_SCROLLBAR_UPDATED, win->GetId() );
76 cevent.SetEventObject( win );
77 win->ProcessEvent( cevent );
78 */
79 }
80
81 //-----------------------------------------------------------------------------
82 // "button_press_event" from slider
83 //-----------------------------------------------------------------------------
84
85 static gint gtk_scrollbar_button_press_callback( GtkRange *WXUNUSED(widget),
86 GdkEventButton *WXUNUSED(gdk_event),
87 wxScrollBar *win )
88 {
89 if (g_isIdle) wxapp_install_idle_handler();
90
91 win->SetScrolling(TRUE);
92 // g_blockEventsOnScroll = TRUE; doesn't work in DialogEd
93
94 return FALSE;
95 }
96
97 //-----------------------------------------------------------------------------
98 // "button_release_event" from slider
99 //-----------------------------------------------------------------------------
100
101 static gint gtk_scrollbar_button_release_callback( GtkRange *WXUNUSED(widget),
102 GdkEventButton *WXUNUSED(gdk_event),
103 wxScrollBar *win )
104 {
105 if (g_isIdle) wxapp_install_idle_handler();
106
107 win->SetScrolling(FALSE);
108 // g_blockEventsOnScroll = FALSE;
109
110 gtk_signal_emit_by_name( GTK_OBJECT(win->m_adjust), "value_changed" );
111
112 return FALSE;
113 }
114
115 //-----------------------------------------------------------------------------
116 // wxScrollBar
117 //-----------------------------------------------------------------------------
118
119 IMPLEMENT_DYNAMIC_CLASS(wxScrollBar,wxControl)
120
121 wxScrollBar::~wxScrollBar(void)
122 {
123 }
124
125 bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
126 const wxPoint& pos, const wxSize& size,
127 long style, const wxValidator& validator, const wxString& name )
128 {
129 m_needParent = TRUE;
130 m_acceptsFocus = TRUE;
131
132 if (!PreCreation( parent, pos, size ) ||
133 !CreateBase( parent, id, pos, size, style, validator, name ))
134 {
135 wxFAIL_MSG( wxT("wxScrollBar creation failed") );
136 return FALSE;
137 }
138
139 m_oldPos = 0.0;
140
141 if ((style & wxSB_VERTICAL) == wxSB_VERTICAL)
142 m_widget = gtk_vscrollbar_new( (GtkAdjustment *) NULL );
143 else
144 m_widget = gtk_hscrollbar_new( (GtkAdjustment *) NULL );
145
146 m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
147
148 gtk_signal_connect( GTK_OBJECT(m_adjust),
149 "value_changed",
150 (GtkSignalFunc) gtk_scrollbar_callback,
151 (gpointer) this );
152
153 gtk_signal_connect( GTK_OBJECT(m_widget),
154 "button_press_event",
155 (GtkSignalFunc)gtk_scrollbar_button_press_callback,
156 (gpointer) this );
157
158 gtk_signal_connect( GTK_OBJECT(m_widget),
159 "button_release_event",
160 (GtkSignalFunc)gtk_scrollbar_button_release_callback,
161 (gpointer) this );
162
163 m_parent->DoAddChild( this );
164
165 PostCreation();
166
167 SetBackgroundColour( parent->GetBackgroundColour() );
168
169 Show( TRUE );
170
171 return TRUE;
172 }
173
174 int wxScrollBar::GetThumbPosition(void) const
175 {
176 return (int)(m_adjust->value+0.5);
177 }
178
179 int wxScrollBar::GetThumbSize() const
180 {
181 return (int)(m_adjust->page_size+0.5);
182 }
183
184 int wxScrollBar::GetPageSize() const
185 {
186 return (int)(m_adjust->page_increment+0.5);
187 }
188
189 int wxScrollBar::GetRange() const
190 {
191 return (int)(m_adjust->upper+0.5);
192 }
193
194 void wxScrollBar::SetThumbPosition( int viewStart )
195 {
196 if (m_isScrolling) return;
197
198 float fpos = (float)viewStart;
199 m_oldPos = fpos;
200 if (fabs(fpos-m_adjust->value) < 0.2) return;
201 m_adjust->value = fpos;
202
203 gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
204 }
205
206 void wxScrollBar::SetScrollbar( int position, int thumbSize, int range, int pageSize,
207 bool WXUNUSED(refresh) )
208 {
209 float fpos = (float)position;
210 float frange = (float)range;
211 float fthumb = (float)thumbSize;
212 float fpage = (float)pageSize;
213
214 if ((fabs(frange-m_adjust->upper) < 0.2) &&
215 (fabs(fthumb-m_adjust->page_size) < 0.2) &&
216 (fabs(fpage-m_adjust->page_increment) < 0.2))
217 {
218 SetThumbPosition( position );
219 return;
220 }
221
222 m_oldPos = fpos;
223
224 m_adjust->lower = 0.0;
225 m_adjust->upper = frange;
226 m_adjust->value = fpos;
227 m_adjust->step_increment = 1.0;
228 m_adjust->page_increment = (float)(wxMax(fpage,0));
229 m_adjust->page_size = fthumb;
230
231 gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
232 }
233
234 /* Backward compatibility */
235 int wxScrollBar::GetValue(void) const
236 {
237 return GetThumbPosition();
238 }
239
240 void wxScrollBar::SetValue( int viewStart )
241 {
242 SetThumbPosition( viewStart );
243 }
244
245 void wxScrollBar::GetValues( int *viewStart, int *viewLength, int *objectLength, int *pageLength ) const
246 {
247 int pos = (int)(m_adjust->value+0.5);
248 int thumb = (int)(m_adjust->page_size+0.5);
249 int page = (int)(m_adjust->page_increment+0.5);
250 int range = (int)(m_adjust->upper+0.5);
251
252 *viewStart = pos;
253 *viewLength = range;
254 *objectLength = thumb;
255 *pageLength = page;
256 }
257
258 int wxScrollBar::GetViewLength() const
259 {
260 return (int)(m_adjust->upper+0.5);
261 }
262
263 int wxScrollBar::GetObjectLength() const
264 {
265 return (int)(m_adjust->page_size+0.5);
266 }
267
268 void wxScrollBar::SetPageSize( int pageLength )
269 {
270 int pos = (int)(m_adjust->value+0.5);
271 int thumb = (int)(m_adjust->page_size+0.5);
272 int range = (int)(m_adjust->upper+0.5);
273 SetScrollbar( pos, thumb, range, pageLength );
274 }
275
276 void wxScrollBar::SetObjectLength( int objectLength )
277 {
278 int pos = (int)(m_adjust->value+0.5);
279 int page = (int)(m_adjust->page_increment+0.5);
280 int range = (int)(m_adjust->upper+0.5);
281 SetScrollbar( pos, objectLength, range, page );
282 }
283
284 void wxScrollBar::SetViewLength( int viewLength )
285 {
286 int pos = (int)(m_adjust->value+0.5);
287 int thumb = (int)(m_adjust->page_size+0.5);
288 int page = (int)(m_adjust->page_increment+0.5);
289 SetScrollbar( pos, thumb, viewLength, page );
290 }
291
292 bool wxScrollBar::IsOwnGtkWindow( GdkWindow *window )
293 {
294 GtkRange *range = GTK_RANGE(m_widget);
295 return ( (window == GTK_WIDGET(range)->window) ||
296 (window == range->trough) ||
297 (window == range->slider) ||
298 (window == range->step_forw) ||
299 (window == range->step_back) );
300 }
301
302 void wxScrollBar::ApplyWidgetStyle()
303 {
304 SetWidgetStyle();
305 gtk_widget_set_style( m_widget, m_widgetStyle );
306 }
307
308 #endif