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[wxWidgets.git] / src / msw / dragimag.cpp
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1/////////////////////////////////////////////////////////////////////////////
2// Name: dragimag.cpp
3// Purpose: wxDragImage
4// Author: Julian Smart
5// Modified by:
6// Created: 08/04/99
7// RCS-ID: $Id$
8// Copyright: (c) Julian Smart
23f681ec 9// Licence: wxWindows licence
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10/////////////////////////////////////////////////////////////////////////////
11
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12// ============================================================================
13// declarations
14// ============================================================================
15
16// ----------------------------------------------------------------------------
17// headers
18// ----------------------------------------------------------------------------
19
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20#ifdef __GNUG__
21#pragma implementation "dragimag.h"
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
fa8dca8d 31#if wxUSE_DRAGIMAGE
1e6feb95 32
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33#if defined(__WIN95__)
34
35#ifndef WX_PRECOMP
36#include <stdio.h>
37#include "wx/setup.h"
38#include "wx/window.h"
39#include "wx/dcclient.h"
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40#include "wx/dcscreen.h"
41#include "wx/dcmemory.h"
42#include "wx/settings.h"
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43#endif
44
1e6feb95 45#include "wx/msw/private.h"
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46#include "wx/log.h"
47#include "wx/intl.h"
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48#include "wx/frame.h"
49#include "wx/image.h"
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50
51#include "wx/msw/dragimag.h"
52#include "wx/msw/private.h"
53
ae090fdb 54#if defined(__WIN95__) && !((defined(__GNUWIN32_OLD__) || defined(__TWIN32__)) && !defined(__CYGWIN10__))
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55#include <commctrl.h>
56#endif
57
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58// ----------------------------------------------------------------------------
59// macros
60// ----------------------------------------------------------------------------
61
7cf83330 62IMPLEMENT_DYNAMIC_CLASS(wxDragImage, wxObject)
7cf83330 63
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64#define GetHimageList() ((HIMAGELIST) m_hImageList)
65
66// ============================================================================
67// implementation
68// ============================================================================
69
70// ----------------------------------------------------------------------------
71// wxDragImage ctors/dtor
72// ----------------------------------------------------------------------------
73
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74wxDragImage::wxDragImage()
75{
68be9f09 76 Init();
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77}
78
79wxDragImage::~wxDragImage()
80{
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81 if ( m_hImageList )
82 ImageList_Destroy(GetHimageList());
6ea5c52d 83#if !wxUSE_SIMPLER_DRAGIMAGE
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84 if ( m_hCursorImageList )
85 ImageList_Destroy((HIMAGELIST) m_hCursorImageList);
6ea5c52d 86#endif
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87}
88
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89void wxDragImage::Init()
90{
91 m_hImageList = 0;
6ea5c52d 92#if !wxUSE_SIMPLER_DRAGIMAGE
68be9f09 93 m_hCursorImageList = 0;
6ea5c52d 94#endif
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95 m_window = (wxWindow*) NULL;
96 m_fullScreen = FALSE;
97}
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98
99// Attributes
100////////////////////////////////////////////////////////////////////////////
101
102
103// Operations
104////////////////////////////////////////////////////////////////////////////
105
106// Create a drag image from a bitmap and optional cursor
aa2d25a5 107bool wxDragImage::Create(const wxBitmap& image, const wxCursor& cursor)
7cf83330 108{
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109 if ( m_hImageList )
110 ImageList_Destroy(GetHimageList());
111 m_hImageList = 0;
7cf83330 112
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113 UINT flags = 0 ;
114 if (image.GetDepth() <= 4)
115 flags = ILC_COLOR4;
116 else if (image.GetDepth() <= 8)
117 flags = ILC_COLOR8;
118 else if (image.GetDepth() <= 16)
119 flags = ILC_COLOR16;
120 else if (image.GetDepth() <= 24)
121 flags = ILC_COLOR24;
122 else
123 flags = ILC_COLOR32;
124
125 bool mask = (image.GetMask() != 0);
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126 if ( mask )
127 flags |= ILC_MASK;
7cf83330 128
23f681ec 129 m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);
7cf83330 130
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131 int index;
132 if (!mask)
133 {
134 HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
135 index = ImageList_Add(GetHimageList(), hBitmap1, 0);
136 }
137 else
138 {
139 HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
140 HBITMAP hBitmap2 = (HBITMAP) image.GetMask()->GetMaskBitmap();
141 HBITMAP hbmpMask = wxInvertMask(hBitmap2);
7cf83330 142
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143 index = ImageList_Add(GetHimageList(), hBitmap1, hbmpMask);
144 ::DeleteObject(hbmpMask);
145 }
23f681ec 146 if ( index == -1 )
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147 {
148 wxLogError(_("Couldn't add an image to the image list."));
149 }
7cf83330 150 m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.
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151
152 return (index != -1) ;
153}
23f681ec 154
7cf83330 155// Create a drag image from an icon and optional cursor
aa2d25a5 156bool wxDragImage::Create(const wxIcon& image, const wxCursor& cursor)
7cf83330 157{
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158 if ( m_hImageList )
159 ImageList_Destroy(GetHimageList());
160 m_hImageList = 0;
7cf83330 161
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162 UINT flags = 0 ;
163 if (image.GetDepth() <= 4)
164 flags = ILC_COLOR4;
165 else if (image.GetDepth() <= 8)
166 flags = ILC_COLOR8;
167 else if (image.GetDepth() <= 16)
168 flags = ILC_COLOR16;
169 else if (image.GetDepth() <= 24)
170 flags = ILC_COLOR24;
171 else
172 flags = ILC_COLOR32;
173 bool mask = TRUE;
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174 if ( mask )
175 flags |= ILC_MASK;
7cf83330 176
23f681ec 177 m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);
7cf83330 178
23f681ec 179 HICON hIcon = (HICON) image.GetHICON();
7cf83330 180
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181 int index = ImageList_AddIcon(GetHimageList(), hIcon);
182 if ( index == -1 )
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183 {
184 wxLogError(_("Couldn't add an image to the image list."));
185 }
186
187 m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.
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188
189 return (index != -1) ;
190}
23f681ec 191
7cf83330 192// Create a drag image from a string and optional cursor
aa2d25a5 193bool wxDragImage::Create(const wxString& str, const wxCursor& cursor)
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194{
195 wxFont font(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
196
197 long w, h;
198 wxScreenDC dc;
199 dc.SetFont(font);
200 dc.GetTextExtent(str, & w, & h);
68be9f09 201 dc.SetFont(wxNullFont);
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202
203 wxMemoryDC dc2;
204 dc2.SetFont(font);
68be9f09 205 wxBitmap bitmap((int) w+2, (int) h+2);
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206 dc2.SelectObject(bitmap);
207
208 dc2.SetBackground(* wxWHITE_BRUSH);
209 dc2.Clear();
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210 dc2.SetBackgroundMode(wxTRANSPARENT);
211 dc2.SetTextForeground(* wxLIGHT_GREY);
7cf83330 212 dc2.DrawText(str, 0, 0);
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213 dc2.DrawText(str, 1, 0);
214 dc2.DrawText(str, 2, 0);
215 dc2.DrawText(str, 1, 1);
216 dc2.DrawText(str, 2, 1);
217 dc2.DrawText(str, 1, 2);
218 dc2.DrawText(str, 2, 2);
219 dc2.SetTextForeground(* wxBLACK);
220 dc2.DrawText(str, 1, 1);
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221
222 dc2.SelectObject(wxNullBitmap);
223
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224 // Make the bitmap masked
225 wxImage image(bitmap);
226 image.SetMaskColour(255, 255, 255);
227 bitmap = image.ConvertToBitmap();
228
aa2d25a5 229 return Create(bitmap, cursor);
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230}
231
232// Create a drag image for the given tree control item
233bool wxDragImage::Create(const wxTreeCtrl& treeCtrl, wxTreeItemId& id)
234{
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235 if ( m_hImageList )
236 ImageList_Destroy(GetHimageList());
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237 m_hImageList = (WXHIMAGELIST) TreeView_CreateDragImage((HWND) treeCtrl.GetHWND(), (HTREEITEM) (WXHTREEITEM) id);
238 return TRUE;
239}
240
241// Create a drag image for the given list control item
242bool wxDragImage::Create(const wxListCtrl& listCtrl, long id)
243{
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244 if ( m_hImageList )
245 ImageList_Destroy(GetHimageList());
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246 POINT pt;
247 pt.x = 0; pt.y = 0;
248 m_hImageList = (WXHIMAGELIST) ListView_CreateDragImage((HWND) listCtrl.GetHWND(), id, & pt);
249 return TRUE;
250}
251
252// Begin drag
68be9f09 253bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, bool fullScreen, wxRect* rect)
7cf83330 254{
223d09f6 255 wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in BeginDrag."));
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256 wxASSERT_MSG( (window != 0), wxT("Window must not be null in BeginDrag."));
257
258 m_fullScreen = fullScreen;
259 if (rect)
260 m_boundingRect = * rect;
7cf83330 261
23f681ec 262 bool ret = (ImageList_BeginDrag(GetHimageList(), 0, hotspot.x, hotspot.y) != 0);
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263
264 if (!ret)
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265 {
266 wxFAIL_MSG( _T("BeginDrag failed.") );
267
7cf83330 268 return FALSE;
23f681ec 269 }
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270
271 if (m_cursor.Ok())
272 {
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273#if wxUSE_SIMPLER_DRAGIMAGE
274 m_oldCursor = window->GetCursor();
275 window->SetCursor(m_cursor);
276#else
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277 if (!m_hCursorImageList)
278 {
279 int cxCursor = GetSystemMetrics(SM_CXCURSOR);
280 int cyCursor = GetSystemMetrics(SM_CYCURSOR);
281
282 m_hCursorImageList = (WXHIMAGELIST) ImageList_Create(cxCursor, cyCursor, ILC_MASK, 1, 1);
283 }
284
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285 // See if we can find the cursor hotspot
286 wxPoint curHotSpot(hotspot);
287
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288 // Although it seems to produce the right position, when the hotspot goeos
289 // negative it has strange effects on the image.
290 // How do we stop the cursor jumping right and below of where it should be?
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291#if 0
292 ICONINFO iconInfo;
293 if (::GetIconInfo((HICON) (HCURSOR) m_cursor.GetHCURSOR(), & iconInfo) != 0)
294 {
295 curHotSpot.x -= iconInfo.xHotspot;
296 curHotSpot.y -= iconInfo.yHotspot;
297 }
298#endif
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299 //wxString msg;
300 //msg.Printf("Hotspot = %d, %d", curHotSpot.x, curHotSpot.y);
301 //wxLogDebug(msg);
aa2d25a5 302
7cf83330 303 // First add the cursor to the image list
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304 HCURSOR hCursor = (HCURSOR) m_cursor.GetHCURSOR();
305 int cursorIndex = ImageList_AddIcon((HIMAGELIST) m_hCursorImageList, (HICON) hCursor);
7cf83330 306
223d09f6 307 wxASSERT_MSG( (cursorIndex != -1), wxT("ImageList_AddIcon failed in BeginDrag."));
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308
309 if (cursorIndex != -1)
310 {
aa2d25a5 311 ImageList_SetDragCursorImage((HIMAGELIST) m_hCursorImageList, cursorIndex, curHotSpot.x, curHotSpot.y);
7cf83330 312 }
6ea5c52d 313#endif
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314 }
315
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316#if !wxUSE_SIMPLER_DRAGIMAGE
317 if (m_cursor.Ok())
318 ::ShowCursor(FALSE);
319#endif
68be9f09 320
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321 m_window = window;
322
23f681ec 323 ::SetCapture(GetHwndOf(window));
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324
325 return TRUE;
326}
23f681ec 327
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328// Begin drag. hotspot is the location of the drag position relative to the upper-left
329// corner of the image. This is full screen only. fullScreenRect gives the
330// position of the window on the screen, to restrict the drag to.
331bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, wxWindow* fullScreenRect)
332{
333 wxRect rect;
334
335 int x = fullScreenRect->GetPosition().x;
336 int y = fullScreenRect->GetPosition().y;
337
338 wxSize sz = fullScreenRect->GetSize();
339
340 if (fullScreenRect->GetParent() && !fullScreenRect->IsKindOf(CLASSINFO(wxFrame)))
341 fullScreenRect->GetParent()->ClientToScreen(& x, & y);
342
343 rect.x = x; rect.y = y;
344 rect.width = sz.x; rect.height = sz.y;
345
346 return BeginDrag(hotspot, window, TRUE, & rect);
347}
348
7cf83330 349// End drag
68be9f09 350bool wxDragImage::EndDrag()
7cf83330 351{
223d09f6 352 wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in EndDrag."));
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353
354 ImageList_EndDrag();
355
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356 if ( !::ReleaseCapture() )
357 {
f6bcfd97 358 wxLogLastError(wxT("ReleaseCapture"));
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359 }
360
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361#if wxUSE_SIMPLER_DRAGIMAGE
362 if (m_cursor.Ok() && m_oldCursor.Ok())
363 m_window->SetCursor(m_oldCursor);
364#else
7cf83330 365 ::ShowCursor(TRUE);
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366#endif
367
68be9f09 368 m_window = (wxWindow*) NULL;
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369
370 return TRUE;
371}
23f681ec 372
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373// Move the image: call from OnMouseMove. Pt is in window client coordinates if window
374// is non-NULL, or in screen coordinates if NULL.
68be9f09 375bool wxDragImage::Move(const wxPoint& pt)
7cf83330 376{
223d09f6 377 wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Move."));
7cf83330 378
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379 // These are in window, not client coordinates.
380 // So need to convert to client coordinates.
381 wxPoint pt2(pt);
0c96db12 382 if (m_window && !m_fullScreen)
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383 {
384 RECT rect;
385 rect.left = 0; rect.top = 0;
386 rect.right = 0; rect.bottom = 0;
387 DWORD style = ::GetWindowLong((HWND) m_window->GetHWND(), GWL_STYLE);
388#ifdef __WIN32__
389 DWORD exStyle = ::GetWindowLong((HWND) m_window->GetHWND(), GWL_EXSTYLE);
390 ::AdjustWindowRectEx(& rect, style, FALSE, exStyle);
391#else
392 ::AdjustWindowRect(& rect, style, FALSE);
393#endif
394 // Subtract the (negative) values, i.e. add a small increment
395 pt2.x -= rect.left; pt2.y -= rect.top;
396 }
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397 else if (m_window && m_fullScreen)
398 {
399 pt2 = m_window->ClientToScreen(pt2);
400 }
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401
402 bool ret = (ImageList_DragMove( pt2.x, pt2.y ) != 0);
7cf83330 403
0c96db12 404 m_position = pt2;
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405
406 return ret;
407}
408
68be9f09 409bool wxDragImage::Show()
7cf83330 410{
223d09f6 411 wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Show."));
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412
413 HWND hWnd = 0;
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414 if (m_window && !m_fullScreen)
415 hWnd = (HWND) m_window->GetHWND();
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416
417 bool ret = (ImageList_DragEnter( hWnd, m_position.x, m_position.y ) != 0);
418
419 return ret;
420}
421
68be9f09 422bool wxDragImage::Hide()
7cf83330 423{
223d09f6 424 wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Hide."));
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425
426 HWND hWnd = 0;
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427 if (m_window && !m_fullScreen)
428 hWnd = (HWND) m_window->GetHWND();
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429
430 bool ret = (ImageList_DragLeave( hWnd ) != 0);
431
432 return ret;
433}
434
435#endif
436 // __WIN95__
437
fa8dca8d 438#endif // wxUSE_DRAGIMAGE