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2bda0e17 1/////////////////////////////////////////////////////////////////////////////
cd0b1709 2// Name: msw/button.cpp
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3// Purpose: wxButton
4// Author: Julian Smart
5// Modified by:
6// Created: 04/01/98
7// RCS-ID: $Id$
8// Copyright: (c) Julian Smart and Markus Holzem
edccf428 9// Licence: wxWindows license
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10/////////////////////////////////////////////////////////////////////////////
11
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12// ============================================================================
13// declarations
14// ============================================================================
15
16// ----------------------------------------------------------------------------
17// headers
18// ----------------------------------------------------------------------------
cd0b1709 19
2bda0e17 20#ifdef __GNUG__
edccf428 21 #pragma implementation "button.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__
edccf428 28 #pragma hdrstop
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29#endif
30
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31#if wxUSE_BUTTON
32
2bda0e17 33#ifndef WX_PRECOMP
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34 #include "wx/button.h"
35 #include "wx/brush.h"
4e938f5b 36 #include "wx/panel.h"
8a4df159 37 #include "wx/bmpbuttn.h"
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38 #include "wx/settings.h"
39 #include "wx/dcscreen.h"
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40#endif
41
42#include "wx/msw/private.h"
43
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44// ----------------------------------------------------------------------------
45// macros
46// ----------------------------------------------------------------------------
47
cd0b1709 48IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl)
2bda0e17 49
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50// this macro tries to adjust the default button height to a reasonable value
51// using the char height as the base
1c4a764c 52#define BUTTON_HEIGHT_FROM_CHAR_HEIGHT(cy) (11*EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)/10)
2bda0e17 53
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54// ============================================================================
55// implementation
56// ============================================================================
57
58// ----------------------------------------------------------------------------
59// creation/destruction
60// ----------------------------------------------------------------------------
61
62bool wxButton::Create(wxWindow *parent,
63 wxWindowID id,
64 const wxString& label,
65 const wxPoint& pos,
66 const wxSize& size,
67 long style,
68 const wxValidator& validator,
69 const wxString& name)
2bda0e17 70{
5b2f31eb 71 if ( !CreateControl(parent, id, pos, size, style, validator, name) )
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72 return FALSE;
73
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74 return MSWCreateControl(_T("BUTTON"), label, pos, size, style);
75}
76
77wxButton::~wxButton()
78{
79}
edccf428 80
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81// ----------------------------------------------------------------------------
82// flags
83// ----------------------------------------------------------------------------
cd0b1709 84
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85WXDWORD wxButton::MSWGetStyle(long style, WXDWORD *exstyle) const
86{
87 // buttons never have an external border, they draw their own one
88 WXDWORD msStyle = wxControl::MSWGetStyle
89 (
90 (style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle
91 );
f6bcfd97 92
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93 // we must use WS_CLIPSIBLINGS with the buttons or they would draw over
94 // each other in any resizeable dialog which has more than one button in
95 // the bottom
96 msStyle |= WS_CLIPSIBLINGS;
b0766406 97
f6bcfd97 98#ifdef __WIN32__
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99 // don't use "else if" here: weird as it is, but you may combine wxBU_LEFT
100 // and wxBU_RIGHT to get BS_CENTER!
101 if ( style & wxBU_LEFT )
f6bcfd97 102 msStyle |= BS_LEFT;
5b2f31eb 103 if ( style & wxBU_RIGHT )
f6bcfd97 104 msStyle |= BS_RIGHT;
5b2f31eb 105 if ( style & wxBU_TOP )
f6bcfd97 106 msStyle |= BS_TOP;
5b2f31eb 107 if ( style & wxBU_BOTTOM )
f6bcfd97 108 msStyle |= BS_BOTTOM;
5b2f31eb 109#endif // __WIN32__
edccf428 110
5b2f31eb 111 return msStyle;
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112}
113
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114// ----------------------------------------------------------------------------
115// size management including autosizing
116// ----------------------------------------------------------------------------
117
f68586e5 118wxSize wxButton::DoGetBestSize() const
2bda0e17 119{
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120 wxString label = wxGetWindowText(GetHWND());
121 int wBtn;
122 GetTextExtent(label, &wBtn, NULL);
edccf428 123
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124 int wChar, hChar;
125 wxGetCharSize(GetHWND(), &wChar, &hChar, &GetFont());
126
127 // add a margin - the button is wider than just its label
128 wBtn += 3*wChar;
129
130 // the button height is proportional to the height of the font used
131 int hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hChar);
edccf428 132
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133 wxSize sz = GetDefaultSize();
134 if (wBtn > sz.x) sz.x = wBtn;
135 if (hBtn > sz.y) sz.y = hBtn;
136
137 return sz;
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138}
139
e1f36ff8 140/* static */
1e6feb95 141wxSize wxButtonBase::GetDefaultSize()
e1f36ff8 142{
8c3c31d4 143 static wxSize s_sizeBtn;
e1f36ff8 144
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145 if ( s_sizeBtn.x == 0 )
146 {
147 wxScreenDC dc;
a756f210 148 dc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
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149
150 // the size of a standard button in the dialog units is 50x14,
151 // translate this to pixels
152 // NB1: the multipliers come from the Windows convention
153 // NB2: the extra +1/+2 were needed to get the size be the same as the
154 // size of the buttons in the standard dialog - I don't know how
155 // this happens, but on my system this size is 75x23 in pixels and
156 // 23*8 isn't even divisible by 14... Would be nice to understand
157 // why these constants are needed though!
158 s_sizeBtn.x = (50 * (dc.GetCharWidth() + 1))/4;
159 s_sizeBtn.y = ((14 * dc.GetCharHeight()) + 2)/8;
160 }
e1f36ff8 161
8c3c31d4 162 return s_sizeBtn;
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163}
164
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165// ----------------------------------------------------------------------------
166// set this button as the default one in its panel
167// ----------------------------------------------------------------------------
168
edccf428 169void wxButton::SetDefault()
2bda0e17 170{
edccf428 171 wxWindow *parent = GetParent();
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172 wxButton *btnOldDefault;
173 if ( parent )
5d1d2d46 174 {
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175 wxWindow *winOldDefault = parent->SetDefaultItem(this);
176 btnOldDefault = wxDynamicCast(winOldDefault, wxButton);
2bda0e17 177
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178 ::SendMessage(GetWinHwnd(parent), DM_SETDEFID, m_windowId, 0L);
179 }
180 else // is a button without parent really normal?
edccf428 181 {
456bc6d9 182 btnOldDefault = NULL;
edccf428 183 }
8ed57d93 184
456bc6d9 185 if ( btnOldDefault && btnOldDefault != this )
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186 {
187 // remove the BS_DEFPUSHBUTTON style from the other button
188 long style = GetWindowLong(GetHwndOf(btnOldDefault), GWL_STYLE);
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189
190 // don't do it with the owner drawn buttons because it will reset
191 // BS_OWNERDRAW style bit too (BS_OWNERDRAW & BS_DEFPUSHBUTTON != 0)!
be4017f8 192 if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
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193 {
194 style &= ~BS_DEFPUSHBUTTON;
195 SendMessage(GetHwndOf(btnOldDefault), BM_SETSTYLE, style, 1L);
196 }
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197 else
198 {
199 // redraw the button - it will notice itself that it's not the
200 // default one any longer
201 btnOldDefault->Refresh();
202 }
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203 }
204
205 // set this button as the default
206 long style = GetWindowLong(GetHwnd(), GWL_STYLE);
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207 if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
208 {
209 style |= BS_DEFPUSHBUTTON;
210 SendMessage(GetHwnd(), BM_SETSTYLE, style, 1L);
211 }
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212}
213
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214// ----------------------------------------------------------------------------
215// helpers
216// ----------------------------------------------------------------------------
217
218bool wxButton::SendClickEvent()
2bda0e17 219{
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220 wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, GetId());
221 event.SetEventObject(this);
222
223 return ProcessCommand(event);
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224}
225
edccf428 226void wxButton::Command(wxCommandEvent & event)
2bda0e17 227{
edccf428 228 ProcessCommand(event);
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229}
230
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231// ----------------------------------------------------------------------------
232// event/message handlers
233// ----------------------------------------------------------------------------
2bda0e17 234
33ac7e6f 235bool wxButton::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
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236{
237 bool processed = FALSE;
57c0af52 238 switch ( param )
edccf428 239 {
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240 case 1: // message came from an accelerator
241 case BN_CLICKED: // normal buttons send this
242 case BN_DOUBLECLICKED: // owner-drawn ones also send this
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243 processed = SendClickEvent();
244 break;
edccf428 245 }
2bda0e17 246
edccf428 247 return processed;
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248}
249
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250long wxButton::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
251{
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252 // when we receive focus, we want to become the default button in our
253 // parent panel
254 if ( nMsg == WM_SETFOCUS )
678cd6de 255 {
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256 SetDefault();
257
258 // let the default processign take place too
678cd6de 259 }
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260 else if ( nMsg == WM_LBUTTONDBLCLK )
261 {
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262 // emulate a click event to force an owner-drawn button to change its
263 // appearance - without this, it won't do it
264 (void)wxControl::MSWWindowProc(WM_LBUTTONDOWN, wParam, lParam);
265
266 // and conitnue with processing the message normally as well
a95e38c0 267 }
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268
269 // let the base class do all real processing
270 return wxControl::MSWWindowProc(nMsg, wParam, lParam);
271}
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272
273// ----------------------------------------------------------------------------
274// owner-drawn buttons support
275// ----------------------------------------------------------------------------
276
277#ifdef __WIN32__
278
279// drawing helpers
280
281static void DrawButtonText(HDC hdc,
282 RECT *pRect,
283 const wxString& text,
284 COLORREF col)
285{
286 COLORREF colOld = SetTextColor(hdc, col);
287 int modeOld = SetBkMode(hdc, TRANSPARENT);
288
289 DrawText(hdc, text, text.length(), pRect,
290 DT_CENTER | DT_VCENTER | DT_SINGLELINE);
291
292 SetBkMode(hdc, modeOld);
293 SetTextColor(hdc, colOld);
294}
295
296static void DrawRect(HDC hdc, const RECT& r)
297{
298 MoveToEx(hdc, r.left, r.top, NULL);
299 LineTo(hdc, r.right, r.top);
300 LineTo(hdc, r.right, r.bottom);
301 LineTo(hdc, r.left, r.bottom);
302 LineTo(hdc, r.left, r.top);
303}
304
305void wxButton::MakeOwnerDrawn()
306{
307 long style = GetWindowLong(GetHwnd(), GWL_STYLE);
9750fc42 308 if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
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309 {
310 // make it so
311 style |= BS_OWNERDRAW;
312 SetWindowLong(GetHwnd(), GWL_STYLE, style);
313 }
314}
315
316bool wxButton::SetBackgroundColour(const wxColour &colour)
317{
318 if ( !wxControl::SetBackgroundColour(colour) )
319 {
320 // nothing to do
321 return FALSE;
322 }
323
324 MakeOwnerDrawn();
325
326 Refresh();
327
328 return TRUE;
329}
330
331bool wxButton::SetForegroundColour(const wxColour &colour)
332{
333 if ( !wxControl::SetForegroundColour(colour) )
334 {
335 // nothing to do
336 return FALSE;
337 }
338
339 MakeOwnerDrawn();
340
341 Refresh();
342
343 return TRUE;
344}
345
346/*
347 The button frame looks like this normally:
348
349 WWWWWWWWWWWWWWWWWWB
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350 WHHHHHHHHHHHHHHHHGB W = white (HILIGHT)
351 WH GB H = light grey (LIGHT)
352 WH GB G = dark grey (SHADOW)
353 WH GB B = black (DKSHADOW)
354 WH GB
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355 WGGGGGGGGGGGGGGGGGB
356 BBBBBBBBBBBBBBBBBBB
357
358 When the button is selected, the button becomes like this (the total button
359 size doesn't change):
360
361 BBBBBBBBBBBBBBBBBBB
362 BWWWWWWWWWWWWWWWWBB
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363 BWHHHHHHHHHHHHHHGBB
364 BWH GBB
365 BWH GBB
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366 BWGGGGGGGGGGGGGGGBB
367 BBBBBBBBBBBBBBBBBBB
368 BBBBBBBBBBBBBBBBBBB
369
370 When the button is pushed (while selected) it is like:
371
372 BBBBBBBBBBBBBBBBBBB
373 BGGGGGGGGGGGGGGGGGB
374 BG GB
375 BG GB
376 BG GB
16162a64 377 BG GB
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378 BGGGGGGGGGGGGGGGGGB
379 BBBBBBBBBBBBBBBBBBB
380*/
381
382static void DrawButtonFrame(HDC hdc, const RECT& rectBtn,
383 bool selected, bool pushed)
384{
385 RECT r;
386 CopyRect(&r, &rectBtn);
387
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388 HPEN hpenBlack = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DDKSHADOW)),
389 hpenGrey = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DSHADOW)),
390 hpenLightGr = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DLIGHT)),
391 hpenWhite = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DHILIGHT));
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392
393 HPEN hpenOld = (HPEN)SelectObject(hdc, hpenBlack);
394
395 r.right--;
396 r.bottom--;
397
398 if ( pushed )
399 {
400 DrawRect(hdc, r);
401
402 (void)SelectObject(hdc, hpenGrey);
403 InflateRect(&r, -1, -1);
404
405 DrawRect(hdc, r);
406 }
407 else // !pushed
408 {
409 if ( selected )
410 {
411 DrawRect(hdc, r);
412
413 InflateRect(&r, -1, -1);
414 }
415
416 MoveToEx(hdc, r.left, r.bottom, NULL);
417 LineTo(hdc, r.right, r.bottom);
418 LineTo(hdc, r.right, r.top - 1);
419
420 (void)SelectObject(hdc, hpenWhite);
421 MoveToEx(hdc, r.left, r.bottom - 1, NULL);
422 LineTo(hdc, r.left, r.top);
423 LineTo(hdc, r.right, r.top);
424
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425 (void)SelectObject(hdc, hpenLightGr);
426 MoveToEx(hdc, r.left + 1, r.bottom - 2, NULL);
427 LineTo(hdc, r.left + 1, r.top + 1);
428 LineTo(hdc, r.right - 1, r.top + 1);
429
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430 (void)SelectObject(hdc, hpenGrey);
431 MoveToEx(hdc, r.left + 1, r.bottom - 1, NULL);
432 LineTo(hdc, r.right - 1, r.bottom - 1);
433 LineTo(hdc, r.right - 1, r.top);
434 }
435
436 (void)SelectObject(hdc, hpenOld);
437 DeleteObject(hpenWhite);
16162a64 438 DeleteObject(hpenLightGr);
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439 DeleteObject(hpenGrey);
440 DeleteObject(hpenBlack);
441}
442
443bool wxButton::MSWOnDraw(WXDRAWITEMSTRUCT *wxdis)
444{
445 LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT)wxdis;
446
447 RECT rectBtn;
448 CopyRect(&rectBtn, &lpDIS->rcItem);
449
450 COLORREF colBg = wxColourToRGB(GetBackgroundColour()),
451 colFg = wxColourToRGB(GetForegroundColour());
452
453 HDC hdc = lpDIS->hDC;
454 UINT state = lpDIS->itemState;
455
456 // first, draw the background
457 HBRUSH hbrushBackground = ::CreateSolidBrush(colBg);
458
459 FillRect(hdc, &rectBtn, hbrushBackground);
460
461 // draw the border for the current state
462 bool selected = (state & ODS_SELECTED) != 0;
463 if ( !selected )
464 {
465 wxPanel *panel = wxDynamicCast(GetParent(), wxPanel);
466 if ( panel )
467 {
468 selected = panel->GetDefaultItem() == this;
469 }
470 }
471 bool pushed = (SendMessage(GetHwnd(), BM_GETSTATE, 0, 0) & BST_PUSHED) != 0;
472
473 DrawButtonFrame(hdc, rectBtn, selected, pushed);
474
475 // draw the focus rect if needed
476 if ( state & ODS_FOCUS )
477 {
478 RECT rectFocus;
479 CopyRect(&rectFocus, &rectBtn);
480
481 // I don't know where does this constant come from, but this is how
482 // Windows draws them
483 InflateRect(&rectFocus, -4, -4);
484
485 DrawFocusRect(hdc, &rectFocus);
486 }
487
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488 if ( pushed )
489 {
490 // the label is shifted by 1 pixel to create "pushed" effect
491 OffsetRect(&rectBtn, 1, 1);
492 }
493
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494 DrawButtonText(hdc, &rectBtn, GetLabel(),
495 state & ODS_DISABLED ? GetSysColor(COLOR_GRAYTEXT)
496 : colFg);
497
498 ::DeleteObject(hbrushBackground);
499
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500 return TRUE;
501}
502
503#endif // __WIN32__
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504
505#endif // wxUSE_BUTTON
506