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1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: msw/checklst.cpp
3 // Purpose: implementation of wxCheckListBox class
4 // Author: Vadim Zeitlin
5 // Modified by:
6 // Created: 16.11.97
7 // RCS-ID: $Id$
8 // Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
9 // Licence: wxWindows license
10 ///////////////////////////////////////////////////////////////////////////////
11
12 #ifdef __GNUG__
13 #pragma implementation "checklst.h"
14 #endif
15
16 // For compilers that support precompilation, includes "wx.h".
17 #include "wx/wxprec.h"
18
19 #ifdef __BORLANDC__
20 #pragma hdrstop
21 #endif
22
23 #if wxUSE_OWNER_DRAWN
24
25 #include <windows.h>
26
27 #include "wx/ownerdrw.h"
28 #include "wx/msw/checklst.h"
29
30 // ============================================================================
31 // implementation
32 // ============================================================================
33
34 #if !USE_SHARED_LIBRARY
35 IMPLEMENT_DYNAMIC_CLASS(wxCheckListBox, wxListBox)
36 #endif
37
38 // ----------------------------------------------------------------------------
39 // declaration and implementation of wxCheckListBoxItem class
40 // ----------------------------------------------------------------------------
41
42 class wxCheckListBoxItem : public wxOwnerDrawn
43 {
44 public:
45 // ctor
46 wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex);
47
48 // drawing functions
49 virtual bool OnDrawItem(wxDC& dc, const wxRect& rc, wxODAction act, wxODStatus stat);
50
51 // simple accessors
52 bool IsChecked() const { return m_bChecked; }
53 void Check(bool bCheck) { m_bChecked = bCheck; }
54 void Toggle();
55
56 private:
57 bool m_bChecked;
58 wxCheckListBox *m_pParent;
59 size_t m_nIndex;
60 };
61
62 wxCheckListBoxItem::wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex)
63 : wxOwnerDrawn("", TRUE) // checkable
64 {
65 m_bChecked = FALSE;
66 m_pParent = pParent;
67 m_nIndex = nIndex;
68
69 // we don't initialize m_nCheckHeight/Width vars because it's
70 // done in OnMeasure while they are used only in OnDraw and we
71 // know that there will always be OnMeasure before OnDraw
72
73 // fix appearance
74 SetFont(wxSystemSettings::GetSystemFont(wxSYS_ANSI_VAR_FONT));
75 SetMarginWidth(GetDefaultMarginWidth());
76 }
77
78 /*
79 * JACS - I've got the owner-draw stuff partially working with WIN16,
80 * with a really horrible-looking cross for wxCheckListBox instead of a
81 * check - could use a bitmap check-mark instead, defined in wx.rc.
82 * Also there's a refresh problem whereby it doesn't always draw the
83 * check until you click to the right of it, which is OK for WIN32.
84 */
85
86 bool wxCheckListBoxItem::OnDrawItem(wxDC& dc, const wxRect& rc,
87 wxODAction act, wxODStatus stat)
88 {
89 if ( IsChecked() )
90 stat = (wxOwnerDrawn::wxODStatus)(stat | wxOwnerDrawn::wxODChecked);
91
92 if ( wxOwnerDrawn::OnDrawItem(dc, rc, act, stat) ) {
93 // ## using native API for performance and precision
94 size_t nCheckWidth = GetDefaultMarginWidth(),
95 nCheckHeight = m_pParent->GetItemHeight();
96
97 int x = rc.GetX(),
98 y = rc.GetY();
99
100 HDC hdc = (HDC)dc.GetHDC();
101
102 // create pens
103 HPEN hpenBack = CreatePen(PS_SOLID, 0, GetSysColor(COLOR_WINDOW)),
104 hpenGray = CreatePen(PS_SOLID, 0, RGB(128, 128, 128)),
105 hpenPrev = (HPEN)SelectObject(hdc, hpenBack);
106
107 // we erase the 1-pixel border
108 Rectangle(hdc, x, y, x + nCheckWidth, y + nCheckHeight);
109
110 // shift check mark 1 pixel to the right (it looks better like this)
111 x++;
112
113 if ( IsChecked() ) {
114 // first create a monochrome bitmap in a memory DC
115 HDC hdcMem = CreateCompatibleDC(hdc);
116 HBITMAP hbmpCheck = CreateBitmap(nCheckWidth, nCheckHeight, 1, 1, 0);
117 HBITMAP hbmpOld = (HBITMAP)SelectObject(hdcMem, hbmpCheck);
118
119 // then draw a check mark into it
120 RECT rect = { 0, 0, nCheckWidth, nCheckHeight };
121
122 #ifdef __WIN32__
123 DrawFrameControl(hdcMem, &rect, DFC_MENU, DFCS_MENUCHECK);
124 #else
125 // In WIN16, draw a cross
126 HPEN blackPen = CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
127 HPEN whiteBrush = GetStockObject(WHITE_BRUSH);
128 HPEN hPenOld = ::SelectObject(hdcMem, blackPen);
129 HPEN hBrushOld = ::SelectObject(hdcMem, whiteBrush);
130 ::SetROP2(hdcMem, R2_COPYPEN);
131 Rectangle(hdcMem, 0, 0, nCheckWidth, nCheckHeight);
132 MoveTo(hdcMem, 0, 0);
133 LineTo(hdcMem, nCheckWidth, nCheckHeight);
134 MoveTo(hdcMem, nCheckWidth, 0);
135 LineTo(hdcMem, 0, nCheckHeight);
136 ::SelectObject(hdcMem, hPenOld);
137 ::SelectObject(hdcMem, hBrushOld);
138 ::DeleteObject(blackPen);
139 #endif
140
141 // finally copy it to screen DC and clean up
142 BitBlt(hdc, x, y, nCheckWidth - 1, nCheckHeight,
143 hdcMem, 0, 0, SRCCOPY);
144
145 SelectObject(hdcMem, hbmpOld);
146 DeleteObject(hbmpCheck);
147 DeleteDC(hdcMem);
148 }
149
150 // now we draw the smaller rectangle
151 y++;
152 nCheckWidth -= 2;
153 nCheckHeight -= 2;
154
155 // draw hollow gray rectangle
156 (void)SelectObject(hdc, hpenGray);
157 HBRUSH hbrPrev = (HBRUSH)SelectObject(hdc, GetStockObject(NULL_BRUSH));
158 Rectangle(hdc, x, y, x + nCheckWidth, y + nCheckHeight);
159
160 // clean up
161 (void)SelectObject(hdc, hpenPrev);
162 (void)SelectObject(hdc, hbrPrev);
163
164 DeleteObject(hpenBack);
165 DeleteObject(hpenGray);
166
167 /*
168 dc.DrawRectangle(x, y, nCheckWidth, nCheckHeight);
169
170 if ( IsChecked() ) {
171 dc.DrawLine(x, y, x + nCheckWidth, y + nCheckHeight);
172 dc.DrawLine(x, y + nCheckHeight, x + nCheckWidth, y);
173 }
174 */
175
176 return TRUE;
177 }
178
179 return FALSE;
180 }
181
182 // change the state of the item and redraw it
183 void wxCheckListBoxItem::Toggle()
184 {
185 m_bChecked = !m_bChecked;
186
187 size_t nHeight = m_pParent->GetItemHeight();
188 size_t y = m_nIndex * nHeight;
189 RECT rcUpdate = { 0, y, GetDefaultMarginWidth(), y + nHeight};
190 InvalidateRect((HWND)m_pParent->GetHWND(), &rcUpdate, FALSE);
191
192 wxCommandEvent event(wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, m_pParent->GetId());
193 event.SetInt(m_nIndex);
194 event.SetEventObject(m_pParent);
195 m_pParent->ProcessCommand(event);
196 }
197
198 // ----------------------------------------------------------------------------
199 // implementation of wxCheckListBox class
200 // ----------------------------------------------------------------------------
201
202 // define event table
203 // ------------------
204 BEGIN_EVENT_TABLE(wxCheckListBox, wxListBox)
205 EVT_CHAR(wxCheckListBox::OnChar)
206 EVT_LEFT_DOWN(wxCheckListBox::OnLeftClick)
207 END_EVENT_TABLE()
208
209 // control creation
210 // ----------------
211
212 // def ctor: use Create() to really create the control
213 wxCheckListBox::wxCheckListBox() : wxListBox()
214 {
215 }
216
217 // ctor which creates the associated control
218 wxCheckListBox::wxCheckListBox(wxWindow *parent, wxWindowID id,
219 const wxPoint& pos, const wxSize& size,
220 int nStrings, const wxString choices[],
221 long style, const wxValidator& val,
222 const wxString& name) // , const wxFont& font)
223 // don't use ctor with arguments! we must call Create()
224 // ourselves from here.
225 : wxListBox()
226 // , m_font(font)
227 {
228 Create(parent, id, pos, size, nStrings, choices, style|wxLB_OWNERDRAW, val, name);
229 }
230
231 // create/retrieve item
232 // --------------------
233
234 // create a check list box item
235 wxOwnerDrawn *wxCheckListBox::CreateItem(size_t nIndex)
236 {
237 wxCheckListBoxItem *pItem = new wxCheckListBoxItem(this, nIndex);
238 if ( m_windowFont.Ok() )
239 pItem->SetFont(m_windowFont);
240
241 return pItem;
242 }
243
244 // get item (converted to right type)
245 #define GetItem(n) ((wxCheckListBoxItem *)(GetItem(n)))
246
247 // return item size
248 // ----------------
249 bool wxCheckListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
250 {
251 if ( wxListBox::MSWOnMeasure(item) ) {
252 MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
253
254 // save item height
255 m_nItemHeight = pStruct->itemHeight;
256
257 // add place for the check mark
258 pStruct->itemWidth += wxOwnerDrawn::GetDefaultMarginWidth();
259
260 return TRUE;
261 }
262
263 return FALSE;
264 }
265
266 // check items
267 // -----------
268
269 bool wxCheckListBox::IsChecked(size_t uiIndex) const
270 {
271 return GetItem(uiIndex)->IsChecked();
272 }
273
274 void wxCheckListBox::Check(size_t uiIndex, bool bCheck)
275 {
276 GetItem(uiIndex)->Check(bCheck);
277 }
278
279 // process events
280 // --------------
281
282 void wxCheckListBox::OnChar(wxKeyEvent& event)
283 {
284 if ( event.KeyCode() == WXK_SPACE )
285 GetItem(GetSelection())->Toggle();
286 else
287 wxListBox::OnChar(event);
288 }
289
290 void wxCheckListBox::OnLeftClick(wxMouseEvent& event)
291 {
292 // clicking on the item selects it, clicking on the checkmark toggles
293 if ( event.GetX() <= wxOwnerDrawn::GetDefaultMarginWidth() ) {
294 // # better use LB_ITEMFROMPOINT perhaps?
295 size_t nItem = ((size_t)event.GetY()) / m_nItemHeight;
296 if ( nItem < (size_t)m_noItems )
297 GetItem(nItem)->Toggle();
298 //else: it's not an error, just click outside of client zone
299 }
300 else {
301 // implement default behaviour: clicking on the item selects it
302 event.Skip();
303 }
304 }
305
306 #endif
307