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0290598f 1///////////////////////////////////////////////////////////////////////////////
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2// Name: generic/caret.cpp
3// Purpose: generic wxCaret class implementation
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4// Author: Vadim Zeitlin (original code by Robert Roebling)
5// Modified by:
6// Created: 25.05.99
7// RCS-ID: $Id$
8// Copyright: (c) wxWindows team
9// Licence: wxWindows licence
10///////////////////////////////////////////////////////////////////////////////
11
12// ============================================================================
13// declarations
14// ============================================================================
15
16// ----------------------------------------------------------------------------
17// headers
18// ----------------------------------------------------------------------------
19
e4628635 20#ifdef __GNUG__
f6bcfd97 21 #pragma implementation "caret.h"
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22#endif
23
24// For compilers that support precompilation, includes "wx.h".
25#include "wx/wxprec.h"
26
27#ifdef __BORLANDC__
28 #pragma hdrstop
29#endif
30
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31#if wxUSE_CARET
32
0290598f 33#ifndef WX_PRECOMP
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34 #include "wx/window.h"
35 #include "wx/dcclient.h"
f4b8bf2f 36 #include "wx/dcmemory.h"
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37#endif //WX_PRECOMP
38
39#include "wx/caret.h"
40
41// ----------------------------------------------------------------------------
42// global variables for this module
43// ----------------------------------------------------------------------------
44
45// the blink time (common to all carets for MSW compatibility)
46static int gs_blinkTime = 500; // in milliseconds
47
48// ============================================================================
49// implementation
50// ============================================================================
51
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52// ----------------------------------------------------------------------------
53// timer stuff
54// ----------------------------------------------------------------------------
55
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56wxCaretTimer::wxCaretTimer(wxCaret *caret)
57{
58 m_caret = caret;
59}
60
61void wxCaretTimer::Notify()
62{
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63 m_caret->OnTimer();
64}
65
66void wxCaret::OnTimer()
67{
68 // don't blink the caret when we don't have the focus
69 if ( m_hasFocus )
70 Blink();
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71}
72
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73// ----------------------------------------------------------------------------
74// wxCaret static functions and data
75// ----------------------------------------------------------------------------
76
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77int wxCaretBase::GetBlinkTime()
78{
79 return gs_blinkTime;
80}
81
82void wxCaretBase::SetBlinkTime(int milliseconds)
83{
84 gs_blinkTime = milliseconds;
85}
86
87// ----------------------------------------------------------------------------
88// initialization and destruction
89// ----------------------------------------------------------------------------
90
91void wxCaret::InitGeneric()
92{
f6bcfd97 93 m_hasFocus = TRUE;
ca5b5b49 94 m_blinkedOut = TRUE;
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95
96 m_xOld =
97 m_yOld = -1;
98 m_bmpUnderCaret.Create(m_width, m_height);
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99}
100
101wxCaret::~wxCaret()
102{
103 if ( IsVisible() )
104 {
105 // stop blinking
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106 if ( m_timer.IsRunning() )
107 m_timer.Stop();
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108 }
109}
110
111// ----------------------------------------------------------------------------
112// showing/hiding/moving the caret (base class interface)
113// ----------------------------------------------------------------------------
114
115void wxCaret::DoShow()
116{
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117 int blinkTime = GetBlinkTime();
118 if ( blinkTime )
119 m_timer.Start(blinkTime);
0290598f 120
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121 if ( m_blinkedOut )
122 Blink();
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123}
124
125void wxCaret::DoHide()
126{
127 m_timer.Stop();
128
129 if ( !m_blinkedOut )
130 {
131 Blink();
132 }
133}
134
135void wxCaret::DoMove()
136{
697e0cdd 137 if ( IsVisible() )
0290598f 138 {
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139 if ( !m_blinkedOut )
140 {
141 // hide it right now and it will be shown the next time it blinks
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142 Blink();
143
144 // but if the caret is not blinking, we should blink it back into
145 // visibility manually
146 if ( !m_timer.IsRunning() )
697e0cdd 147 Blink();
697e0cdd 148 }
0290598f 149 }
697e0cdd 150 //else: will be shown at the correct location when it is shown
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151}
152
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153// ----------------------------------------------------------------------------
154// handling the focus
155// ----------------------------------------------------------------------------
156
157void wxCaret::OnSetFocus()
158{
159 m_hasFocus = TRUE;
160
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161 if ( IsVisible() )
162 Refresh();
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163}
164
165void wxCaret::OnKillFocus()
166{
167 m_hasFocus = FALSE;
168
169 if ( IsVisible() )
170 {
171 // the caret must be shown - otherwise, if it is hidden now, it will
172 // stay so until the focus doesn't return because it won't blink any
173 // more
f6bcfd97 174
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175 // hide it first if it isn't hidden ...
176 if ( !m_blinkedOut )
177 Blink();
178
179 // .. and show it in the new style
180 Blink();
181 }
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182}
183
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184// ----------------------------------------------------------------------------
185// drawing the caret
186// ----------------------------------------------------------------------------
187
188void wxCaret::Blink()
189{
190 m_blinkedOut = !m_blinkedOut;
191
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192 Refresh();
193}
194
195void wxCaret::Refresh()
196{
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197 wxClientDC dcWin(GetWindow());
198 wxMemoryDC dcMem;
199 dcMem.SelectObject(m_bmpUnderCaret);
200 if ( m_blinkedOut )
0290598f 201 {
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202 // restore the old image
203 dcWin.Blit(m_xOld, m_yOld, m_width, m_height,
204 &dcMem, 0, 0);
205 m_xOld =
206 m_yOld = -1;
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207 }
208 else
209 {
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210 if ( m_xOld == -1 && m_yOld == -1 )
211 {
212 // save the part we're going to overdraw
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213
214 int x = m_x,
215 y = m_y;
216#if defined(__WXGTK__) && !defined(__WX_DC_BLIT_FIXED__)
217 wxPoint pt = dcWin.GetDeviceOrigin();
218 x += pt.x;
219 y += pt.y;
220#endif // broken wxGTK wxDC::Blit
f4b8bf2f 221 dcMem.Blit(0, 0, m_width, m_height,
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222 &dcWin, x, y);
223
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224 m_xOld = m_x;
225 m_yOld = m_y;
226 }
227 //else: we already saved the image below the caret, don't do it any
228 // more
f6bcfd97 229
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230 // and draw the caret there
231 DoDraw(&dcWin);
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232 }
233}
234
235void wxCaret::DoDraw(wxDC *dc)
236{
237 dc->SetPen( *wxBLACK_PEN );
f6bcfd97 238
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239 dc->SetBrush(*(m_hasFocus ? wxBLACK_BRUSH : wxTRANSPARENT_BRUSH));
240 dc->SetPen(*wxBLACK_PEN);
241
242 // VZ: unfortunately, the rectangle comes out a pixel smaller when this is
243 // done under wxGTK - no idea why
244 //dc->SetLogicalFunction(wxINVERT);
245
246 dc->DrawRectangle(m_x, m_y, m_width, m_height);
0290598f 247}
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248
249#endif // wxUSE_CARET