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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: slider.cpp | |
3 | // Purpose: | |
4 | // Author: Robert Roebling | |
5 | // Id: $Id$ | |
6 | // Copyright: (c) 1998 Robert Roebling | |
7 | // Licence: wxWindows licence | |
8 | ///////////////////////////////////////////////////////////////////////////// | |
9 | ||
10 | #ifdef __GNUG__ | |
11 | #pragma implementation "slider.h" | |
12 | #endif | |
13 | ||
14 | #include "wx/slider.h" | |
15 | #include "wx/utils.h" | |
16 | #include <math.h> | |
17 | ||
18 | #include "gdk/gdk.h" | |
19 | #include "gtk/gtk.h" | |
20 | ||
21 | //----------------------------------------------------------------------------- | |
22 | // idle system | |
23 | //----------------------------------------------------------------------------- | |
24 | ||
25 | extern void wxapp_install_idle_handler(); | |
26 | extern bool g_isIdle; | |
27 | ||
28 | //----------------------------------------------------------------------------- | |
29 | // data | |
30 | //----------------------------------------------------------------------------- | |
31 | ||
32 | extern bool g_blockEventsOnDrag; | |
33 | ||
34 | //----------------------------------------------------------------------------- | |
35 | // "value_changed" | |
36 | //----------------------------------------------------------------------------- | |
37 | ||
38 | static void gtk_slider_callback( GtkWidget *WXUNUSED(widget), wxSlider *win ) | |
39 | { | |
40 | if (g_isIdle) wxapp_install_idle_handler(); | |
41 | ||
42 | if (!win->m_hasVMT) return; | |
43 | if (g_blockEventsOnDrag) return; | |
44 | ||
45 | float diff = win->m_adjust->value - win->m_oldPos; | |
46 | if (fabs(diff) < 0.2) return; | |
47 | win->m_oldPos = win->m_adjust->value; | |
48 | ||
49 | wxEventType command = wxEVT_NULL; | |
50 | ||
51 | float line_step = win->m_adjust->step_increment; | |
52 | float page_step = win->m_adjust->page_increment; | |
53 | ||
54 | if (fabs(win->m_adjust->value-win->m_adjust->lower) < 0.2) command = wxEVT_SCROLL_BOTTOM; | |
55 | else if (fabs(win->m_adjust->value-win->m_adjust->upper) < 0.2) command = wxEVT_SCROLL_TOP; | |
56 | else if (fabs(diff-line_step) < 0.2) command = wxEVT_SCROLL_LINEDOWN; | |
57 | else if (fabs(diff+line_step) < 0.2) command = wxEVT_SCROLL_LINEUP; | |
58 | else if (fabs(diff-page_step) < 0.2) command = wxEVT_SCROLL_PAGEDOWN; | |
59 | else if (fabs(diff+page_step) < 0.2) command = wxEVT_SCROLL_PAGEUP; | |
60 | else command = wxEVT_SCROLL_THUMBTRACK; | |
61 | ||
62 | int value = (int)ceil(win->m_adjust->value); | |
63 | ||
64 | int orient = wxHORIZONTAL; | |
65 | if (win->GetWindowStyleFlag() & wxSB_VERTICAL == wxSB_VERTICAL) orient = wxVERTICAL; | |
66 | ||
67 | wxScrollEvent event( command, win->GetId(), value, orient ); | |
68 | event.SetEventObject( win ); | |
69 | win->GetEventHandler()->ProcessEvent( event ); | |
70 | ||
71 | wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() ); | |
72 | cevent.SetEventObject( win ); | |
73 | win->GetEventHandler()->ProcessEvent( cevent ); | |
74 | } | |
75 | ||
76 | //----------------------------------------------------------------------------- | |
77 | // wxSlider | |
78 | //----------------------------------------------------------------------------- | |
79 | ||
80 | IMPLEMENT_DYNAMIC_CLASS(wxSlider,wxControl) | |
81 | ||
82 | wxSlider::wxSlider(void) | |
83 | { | |
84 | } | |
85 | ||
86 | wxSlider::~wxSlider(void) | |
87 | { | |
88 | } | |
89 | ||
90 | bool wxSlider::Create(wxWindow *parent, wxWindowID id, | |
91 | int value, int minValue, int maxValue, | |
92 | const wxPoint& pos, const wxSize& size, | |
93 | long style, const wxValidator& validator, const wxString& name ) | |
94 | { | |
95 | m_acceptsFocus = TRUE; | |
96 | m_needParent = TRUE; | |
97 | ||
98 | PreCreation( parent, id, pos, size, style, name ); | |
99 | ||
100 | SetValidator( validator ); | |
101 | ||
102 | m_oldPos = 0.0; | |
103 | ||
104 | if (style & wxSL_VERTICAL) | |
105 | m_widget = gtk_vscale_new( (GtkAdjustment *) NULL ); | |
106 | else | |
107 | m_widget = gtk_hscale_new( (GtkAdjustment *) NULL ); | |
108 | ||
109 | if (style & wxSL_LABELS) | |
110 | { | |
111 | gtk_scale_set_draw_value( GTK_SCALE( m_widget ), TRUE ); | |
112 | ||
113 | /* labels need more space and too small window will | |
114 | cause junk to appear on the dialog */ | |
115 | if (style & wxSL_VERTICAL) | |
116 | { | |
117 | wxSize sz( size ); | |
118 | if (sz.x < 35) | |
119 | { | |
120 | sz.x = 35; | |
121 | SetSize( sz ); | |
122 | } | |
123 | } | |
124 | else | |
125 | { | |
126 | wxSize sz( size ); | |
127 | if (sz.y < 35) | |
128 | { | |
129 | sz.y = 35; | |
130 | SetSize( sz ); | |
131 | } | |
132 | } | |
133 | } | |
134 | else | |
135 | gtk_scale_set_draw_value( GTK_SCALE( m_widget ), FALSE ); | |
136 | ||
137 | m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) ); | |
138 | ||
139 | gtk_signal_connect( GTK_OBJECT(m_adjust), | |
140 | "value_changed", | |
141 | (GtkSignalFunc) gtk_slider_callback, | |
142 | (gpointer) this ); | |
143 | ||
144 | SetRange( minValue, maxValue ); | |
145 | SetValue( value ); | |
146 | ||
147 | m_parent->DoAddChild( this ); | |
148 | ||
149 | PostCreation(); | |
150 | ||
151 | SetBackgroundColour( parent->GetBackgroundColour() ); | |
152 | ||
153 | Show( TRUE ); | |
154 | ||
155 | return TRUE; | |
156 | } | |
157 | ||
158 | int wxSlider::GetValue(void) const | |
159 | { | |
160 | return (int)(m_adjust->value+0.5); | |
161 | } | |
162 | ||
163 | void wxSlider::SetValue( int value ) | |
164 | { | |
165 | float fpos = (float)value; | |
166 | m_oldPos = fpos; | |
167 | if (fabs(fpos-m_adjust->value) < 0.2) return; | |
168 | ||
169 | m_adjust->value = fpos; | |
170 | ||
171 | gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" ); | |
172 | } | |
173 | ||
174 | void wxSlider::SetRange( int minValue, int maxValue ) | |
175 | { | |
176 | float fmin = (float)minValue; | |
177 | float fmax = (float)maxValue; | |
178 | ||
179 | if ((fabs(fmin-m_adjust->lower) < 0.2) && | |
180 | (fabs(fmax-m_adjust->upper) < 0.2)) | |
181 | { | |
182 | return; | |
183 | } | |
184 | ||
185 | m_adjust->lower = fmin; | |
186 | m_adjust->upper = fmax; | |
187 | ||
188 | gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" ); | |
189 | } | |
190 | ||
191 | int wxSlider::GetMin(void) const | |
192 | { | |
193 | return (int)ceil(m_adjust->lower); | |
194 | } | |
195 | ||
196 | int wxSlider::GetMax(void) const | |
197 | { | |
198 | return (int)ceil(m_adjust->upper); | |
199 | } | |
200 | ||
201 | void wxSlider::SetPageSize( int pageSize ) | |
202 | { | |
203 | float fpage = (float)pageSize; | |
204 | ||
205 | if (fabs(fpage-m_adjust->page_increment) < 0.2) return; | |
206 | ||
207 | m_adjust->page_increment = fpage; | |
208 | ||
209 | gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" ); | |
210 | } | |
211 | ||
212 | int wxSlider::GetPageSize(void) const | |
213 | { | |
214 | return (int)ceil(m_adjust->page_increment); | |
215 | } | |
216 | ||
217 | void wxSlider::SetThumbLength( int len ) | |
218 | { | |
219 | float flen = (float)len; | |
220 | ||
221 | if (fabs(flen-m_adjust->page_size) < 0.2) return; | |
222 | ||
223 | m_adjust->page_size = flen; | |
224 | ||
225 | gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" ); | |
226 | } | |
227 | ||
228 | int wxSlider::GetThumbLength(void) const | |
229 | { | |
230 | return (int)ceil(m_adjust->page_size); | |
231 | } | |
232 | ||
233 | void wxSlider::SetLineSize( int WXUNUSED(lineSize) ) | |
234 | { | |
235 | } | |
236 | ||
237 | int wxSlider::GetLineSize(void) const | |
238 | { | |
239 | return 0; | |
240 | } | |
241 | ||
242 | void wxSlider::SetTick( int WXUNUSED(tickPos) ) | |
243 | { | |
244 | } | |
245 | ||
246 | void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) ) | |
247 | { | |
248 | } | |
249 | ||
250 | int wxSlider::GetTickFreq(void) const | |
251 | { | |
252 | return 0; | |
253 | } | |
254 | ||
255 | void wxSlider::ClearTicks(void) | |
256 | { | |
257 | } | |
258 | ||
259 | void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) ) | |
260 | { | |
261 | } | |
262 | ||
263 | int wxSlider::GetSelEnd(void) const | |
264 | { | |
265 | return 0; | |
266 | } | |
267 | ||
268 | int wxSlider::GetSelStart(void) const | |
269 | { | |
270 | return 0; | |
271 | } | |
272 | ||
273 | void wxSlider::ClearSel(void) | |
274 | { | |
275 | } | |
276 | ||
277 | bool wxSlider::IsOwnGtkWindow( GdkWindow *window ) | |
278 | { | |
279 | GtkRange *range = GTK_RANGE(m_widget); | |
280 | return ( (window == GTK_WIDGET(range)->window) || | |
281 | (window == range->trough) || | |
282 | (window == range->slider) || | |
283 | (window == range->step_forw) || | |
284 | (window == range->step_back) ); | |
285 | } | |
286 | ||
287 | void wxSlider::ApplyWidgetStyle() | |
288 | { | |
289 | SetWidgetStyle(); | |
290 | gtk_widget_set_style( m_widget, m_widgetStyle ); | |
291 | } |