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added possibility to throw different objects and crash directly from the main frame...
[wxWidgets.git] / src / gtk1 / scrolbar.cpp
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c801d85f 1/////////////////////////////////////////////////////////////////////////////
1e6feb95 2// Name: src/gtk/scrolbar.cpp
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3// Purpose:
4// Author: Robert Roebling
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5// Id: $Id$
6// Copyright: (c) 1998 Robert Roebling
65571936 7// Licence: wxWindows licence
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8/////////////////////////////////////////////////////////////////////////////
9
10
14f355c2 11#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
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12#pragma implementation "scrolbar.h"
13#endif
14
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15// For compilers that support precompilation, includes "wx.h".
16#include "wx/wxprec.h"
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17
18#if wxUSE_SCROLLBAR
19
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20#include "wx/scrolbar.h"
21
c801d85f 22#include "wx/utils.h"
463c4d71 23#include "wx/math.h"
9e691f46 24#include "wx/gtk/private.h"
83624f79 25
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26//-----------------------------------------------------------------------------
27// idle system
28//-----------------------------------------------------------------------------
29
30extern void wxapp_install_idle_handler();
31extern bool g_isIdle;
32
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33//-----------------------------------------------------------------------------
34// data
35//-----------------------------------------------------------------------------
36
37extern bool g_blockEventsOnDrag;
76ed8f8d 38extern bool g_blockEventsOnScroll;
7c2f14ee 39static wxEventType g_currentUpDownEvent = wxEVT_NULL;
66bd6b93 40
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41static const float sensitivity = 0.02;
42
c801d85f 43//-----------------------------------------------------------------------------
b4071e91 44// "value_changed"
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45//-----------------------------------------------------------------------------
46
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47// FIXME: is GtkScrollType really passed to us as 2nd argument?
48
49static void gtk_scrollbar_callback( GtkAdjustment *adjust,
50 SCROLLBAR_CBACK_ARG
51 wxScrollBar *win )
a2615ebc 52{
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53 if (g_isIdle) wxapp_install_idle_handler();
54
a2053b27 55 if (!win->m_hasVMT) return;
2d17d68f 56 if (g_blockEventsOnDrag) return;
a2615ebc 57
e1811a01 58 float diff = adjust->value - win->m_oldPos;
aed8ac3f 59 if (fabs(diff) < sensitivity) return;
a2615ebc 60
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61 win->m_oldPos = adjust->value;
62
9e691f46 63 wxEventType command = GtkScrollTypeToWx(GET_SCROLL_TYPE(win->m_widget));
e1811a01 64
0a07a7d8 65 double dvalue = adjust->value;
a9f21e71 66 int value = (int)(dvalue < 0 ? dvalue - 0.5 : dvalue + 0.5);
a2615ebc 67
f03fc89f 68 int orient = win->HasFlag(wxSB_VERTICAL) ? wxVERTICAL : wxHORIZONTAL;
a2615ebc 69
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70 // throw a LINEUP / LINEDOWN event if necessary
71 if (g_currentUpDownEvent != wxEVT_NULL)
72 {
73 wxScrollEvent event( g_currentUpDownEvent, win->GetId(), value, orient );
74 event.SetEventObject( win );
75 win->GetEventHandler()->ProcessEvent( event );
76 }
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77
78 // throw other event (wxEVT_SCROLL_THUMBTRACK)
79 wxScrollEvent event( command, win->GetId(), value, orient );
80 event.SetEventObject( win );
81 win->GetEventHandler()->ProcessEvent( event );
7c2f14ee 82
c801d85f 83/*
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84 wxCommandEvent cevent( wxEVT_COMMAND_SCROLLBAR_UPDATED, win->GetId() );
85 cevent.SetEventObject( win );
86 win->ProcessEvent( cevent );
c801d85f 87*/
6de97a3b 88}
c801d85f 89
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90//-----------------------------------------------------------------------------
91// "button_press_event" from slider
92//-----------------------------------------------------------------------------
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93static gint gtk_scrollbar_button_press_callback( GtkRange *widget,
94 GdkEventButton *gdk_event,
f03fc89f 95 wxScrollBar *win )
cb43b372 96{
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97 if (g_isIdle) wxapp_install_idle_handler();
98
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99 // check if a LINEUP/LINEDOWN event must be thrown
100 // I suppose here the size of scrollbar top/bottom buttons is 16px height
101 if (gdk_event->type == GDK_BUTTON_PRESS && gdk_event->button == 1)
102 {
103 int scroll_height, mouse_pos;
104
105 // get the mouse position when the click is done
03ed1dae 106 if (win->HasFlag(wxSB_VERTICAL))
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107 {
108 scroll_height = GTK_WIDGET(widget)->allocation.height - 16;
109 mouse_pos = (int)gdk_event->y;
110 }
111 else
112 {
113 scroll_height = GTK_WIDGET(widget)->allocation.width - 16;
114 mouse_pos = (int)gdk_event->x;
115 }
116
117 // compare mouse position to scrollbar height
118 if (mouse_pos > scroll_height)
119 g_currentUpDownEvent = wxEVT_SCROLL_LINEDOWN;
120 else if (mouse_pos < 16)
121 g_currentUpDownEvent = wxEVT_SCROLL_LINEUP;
122 }
2a23d363 123
9e691f46 124#ifndef __WXGTK20__
7c2f14ee 125 // There is no slider field any more
2a23d363 126 win->m_isScrolling = (gdk_event->window == widget->slider);
9e691f46 127#endif
a2615ebc 128
acfd422a 129 return FALSE;
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130}
131
132//-----------------------------------------------------------------------------
133// "button_release_event" from slider
134//-----------------------------------------------------------------------------
135
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136static gint
137gtk_scrollbar_button_release_callback( GtkRange *WXUNUSED(widget),
138 GdkEventButton *WXUNUSED(gdk_event),
139 wxScrollBar *win )
cb43b372 140{
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141 if (g_isIdle)
142 wxapp_install_idle_handler();
143
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144 if (win->m_isScrolling)
145 {
7d56fb8f 146 wxEventType command = wxEVT_SCROLL_THUMBRELEASE;
2a23d363 147 int value = (int)ceil(win->m_adjust->value);
193e19cf 148 int orient = win->HasFlag(wxSB_VERTICAL) ? wxVERTICAL : wxHORIZONTAL;
2a23d363 149
193e19cf 150 wxScrollEvent event( command, win->GetId(), value, orient );
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151 event.SetEventObject( win );
152 win->GetEventHandler()->ProcessEvent( event );
153 }
a2615ebc 154
2a23d363 155 win->m_isScrolling = FALSE;
a2615ebc 156
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157 // reset the LINEUP/LINEDOWN flag when the mouse button is released
158 g_currentUpDownEvent = wxEVT_NULL;
159
2d17d68f 160 return FALSE;
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161}
162
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163//-----------------------------------------------------------------------------
164// wxScrollBar
165//-----------------------------------------------------------------------------
166
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167IMPLEMENT_DYNAMIC_CLASS(wxScrollBar,wxControl)
168
0a07a7d8 169wxScrollBar::~wxScrollBar()
c801d85f 170{
6de97a3b 171}
c801d85f 172
debe6624 173bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
c801d85f 174 const wxPoint& pos, const wxSize& size,
6de97a3b 175 long style, const wxValidator& validator, const wxString& name )
c801d85f 176{
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177 m_needParent = TRUE;
178 m_acceptsFocus = TRUE;
a2615ebc 179
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180 if (!PreCreation( parent, pos, size ) ||
181 !CreateBase( parent, id, pos, size, style, validator, name ))
182 {
223d09f6 183 wxFAIL_MSG( wxT("wxScrollBar creation failed") );
0a07a7d8 184 return FALSE;
4dcaf11a 185 }
6de97a3b 186
2d17d68f 187 m_oldPos = 0.0;
c801d85f 188
d9bd1494 189 if ((style & wxSB_VERTICAL) == wxSB_VERTICAL)
2d17d68f 190 m_widget = gtk_vscrollbar_new( (GtkAdjustment *) NULL );
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191 else
192 m_widget = gtk_hscrollbar_new( (GtkAdjustment *) NULL );
193
2d17d68f 194 m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
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195
196 gtk_signal_connect( GTK_OBJECT(m_adjust),
2d17d68f 197 "value_changed",
a2615ebc 198 (GtkSignalFunc) gtk_scrollbar_callback,
f03fc89f 199 (gpointer) this );
a2615ebc 200 gtk_signal_connect( GTK_OBJECT(m_widget),
2d17d68f 201 "button_press_event",
a2615ebc 202 (GtkSignalFunc)gtk_scrollbar_button_press_callback,
f03fc89f 203 (gpointer) this );
a2615ebc 204 gtk_signal_connect( GTK_OBJECT(m_widget),
2d17d68f 205 "button_release_event",
a2615ebc 206 (GtkSignalFunc)gtk_scrollbar_button_release_callback,
f03fc89f 207 (gpointer) this );
cb43b372 208
f03fc89f 209 m_parent->DoAddChild( this );
a2615ebc 210
abdeb9e7 211 PostCreation(size);
a2615ebc 212
2d17d68f 213 return TRUE;
6de97a3b 214}
c801d85f 215
0a07a7d8 216int wxScrollBar::GetThumbPosition() const
c801d85f 217{
0a07a7d8 218 double val = m_adjust->value;
a9f21e71 219 return (int)(val < 0 ? val - 0.5 : val + 0.5);
6de97a3b 220}
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221
222int wxScrollBar::GetThumbSize() const
223{
2d17d68f 224 return (int)(m_adjust->page_size+0.5);
6de97a3b 225}
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226
227int wxScrollBar::GetPageSize() const
228{
2d17d68f 229 return (int)(m_adjust->page_increment+0.5);
6de97a3b 230}
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231
232int wxScrollBar::GetRange() const
233{
2d17d68f 234 return (int)(m_adjust->upper+0.5);
6de97a3b 235}
c801d85f 236
4fabb575 237void wxScrollBar::SetThumbPosition( int viewStart )
c801d85f 238{
2d17d68f 239 if (m_isScrolling) return;
a2615ebc 240
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241 float fpos = (float)viewStart;
242 m_oldPos = fpos;
243 if (fabs(fpos-m_adjust->value) < 0.2) return;
244 m_adjust->value = fpos;
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245
246 gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust),
247 (GtkSignalFunc) gtk_scrollbar_callback,
2a23d363 248 (gpointer) this );
a2615ebc 249
2d17d68f 250 gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
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251
252 gtk_signal_connect( GTK_OBJECT(m_adjust),
2a23d363 253 "value_changed",
a2615ebc 254 (GtkSignalFunc) gtk_scrollbar_callback,
2a23d363 255 (gpointer) this );
6de97a3b 256}
c801d85f 257
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258void wxScrollBar::SetScrollbar( int position, int thumbSize, int range, int pageSize,
259 bool WXUNUSED(refresh) )
c801d85f 260{
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261 float fpos = (float)position;
262 float frange = (float)range;
263 float fthumb = (float)thumbSize;
264 float fpage = (float)pageSize;
a2615ebc 265
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266 if ((fabs(frange-m_adjust->upper) < 0.2) &&
267 (fabs(fthumb-m_adjust->page_size) < 0.2) &&
268 (fabs(fpage-m_adjust->page_increment) < 0.2))
269 {
270 SetThumbPosition( position );
271 return;
272 }
a2615ebc 273
2d17d68f 274 m_oldPos = fpos;
a2615ebc 275
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276 m_adjust->lower = 0.0;
277 m_adjust->upper = frange;
278 m_adjust->value = fpos;
279 m_adjust->step_increment = 1.0;
280 m_adjust->page_increment = (float)(wxMax(fpage,0));
281 m_adjust->page_size = fthumb;
282
283 gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
6de97a3b 284}
c801d85f 285
2d17d68f 286/* Backward compatibility */
0a07a7d8 287int wxScrollBar::GetValue() const
c801d85f 288{
2d17d68f 289 return GetThumbPosition();
6de97a3b 290}
c801d85f 291
debe6624 292void wxScrollBar::SetValue( int viewStart )
c801d85f 293{
2d17d68f 294 SetThumbPosition( viewStart );
6de97a3b 295}
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296
297void wxScrollBar::GetValues( int *viewStart, int *viewLength, int *objectLength, int *pageLength ) const
298{
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299 int pos = (int)(m_adjust->value+0.5);
300 int thumb = (int)(m_adjust->page_size+0.5);
301 int page = (int)(m_adjust->page_increment+0.5);
302 int range = (int)(m_adjust->upper+0.5);
a2615ebc 303
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304 *viewStart = pos;
305 *viewLength = range;
306 *objectLength = thumb;
307 *pageLength = page;
6de97a3b 308}
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309
310int wxScrollBar::GetViewLength() const
311{
2d17d68f 312 return (int)(m_adjust->upper+0.5);
6de97a3b 313}
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314
315int wxScrollBar::GetObjectLength() const
316{
2d17d68f 317 return (int)(m_adjust->page_size+0.5);
6de97a3b 318}
c801d85f 319
debe6624 320void wxScrollBar::SetPageSize( int pageLength )
c801d85f 321{
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322 int pos = (int)(m_adjust->value+0.5);
323 int thumb = (int)(m_adjust->page_size+0.5);
324 int range = (int)(m_adjust->upper+0.5);
325 SetScrollbar( pos, thumb, range, pageLength );
6de97a3b 326}
c801d85f 327
debe6624 328void wxScrollBar::SetObjectLength( int objectLength )
c801d85f 329{
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330 int pos = (int)(m_adjust->value+0.5);
331 int page = (int)(m_adjust->page_increment+0.5);
332 int range = (int)(m_adjust->upper+0.5);
333 SetScrollbar( pos, objectLength, range, page );
6de97a3b 334}
c801d85f 335
debe6624 336void wxScrollBar::SetViewLength( int viewLength )
c801d85f 337{
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338 int pos = (int)(m_adjust->value+0.5);
339 int thumb = (int)(m_adjust->page_size+0.5);
340 int page = (int)(m_adjust->page_increment+0.5);
341 SetScrollbar( pos, thumb, viewLength, page );
6de97a3b 342}
c801d85f 343
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344bool wxScrollBar::IsOwnGtkWindow( GdkWindow *window )
345{
2d17d68f 346 GtkRange *range = GTK_RANGE(m_widget);
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347 return ( (window == GTK_WIDGET(range)->window)
348#ifndef __WXGTK20__
349 || (window == range->trough)
350 || (window == range->slider)
351 || (window == range->step_forw)
352 || (window == range->step_back)
353#endif // GTK+ 1.x
354 );
b4071e91 355}
58614078 356
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357wxSize wxScrollBar::DoGetBestSize() const
358{
359 return wxControl::DoGetBestSize();
360}
361
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362// static
363wxVisualAttributes
364wxScrollBar::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
365{
366 return GetDefaultAttributesFromGTKWidget(gtk_vscrollbar_new);
367}
368
dcf924a3 369#endif