Added candidate wxDragImage implementation for wxMSW
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2071 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Julian Smart
253
src/msw/dragimag.cpp
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253
src/msw/dragimag.cpp
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/////////////////////////////////////////////////////////////////////////////
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// Name: dragimag.cpp
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// Purpose: wxDragImage
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// Author: Julian Smart
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// Modified by:
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// Created: 08/04/99
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// RCS-ID: $Id$
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// Copyright: (c) Julian Smart
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifdef __GNUG__
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#pragma implementation "dragimag.h"
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#endif
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#if defined(__WIN95__)
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#ifndef WX_PRECOMP
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#include <stdio.h>
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#include "wx/setup.h"
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#include "wx/window.h"
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#include "wx/dcclient.h"
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#endif
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#include "wx/log.h"
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#include "wx/intl.h"
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#include "wx/msw/dragimag.h"
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#include "wx/msw/private.h"
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#if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__)
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#include <commctrl.h>
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#endif
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#if !USE_SHARED_LIBRARY
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IMPLEMENT_DYNAMIC_CLASS(wxDragImage, wxObject)
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#endif
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wxDragImage::wxDragImage()
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{
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m_hImageList = 0;
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}
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wxDragImage::~wxDragImage()
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{
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if ( m_hImageList )
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ImageList_Destroy((HIMAGELIST) m_hImageList);
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m_hImageList = 0;
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}
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// Attributes
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////////////////////////////////////////////////////////////////////////////
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// Operations
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////////////////////////////////////////////////////////////////////////////
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// Create a drag image from a bitmap and optional cursor
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bool wxDragImage::Create(const wxBitmap& image, const wxCursor& cursor, const wxPoint& hotspot)
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{
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if ( m_hImageList )
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ImageList_Destroy((HIMAGELIST) m_hImageList);
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m_hImageList = 0;
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UINT flags = 0;
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bool mask = TRUE; // ?
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if ( mask )
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flags |= ILC_MASK;
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m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);
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HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
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HBITMAP hBitmap2 = 0;
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if ( image.GetMask() )
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hBitmap2 = (HBITMAP) image.GetMask()->GetMaskBitmap();
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int index = ImageList_Add((HIMAGELIST) m_hImageList, hBitmap1, hBitmap2);
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if ( index == -1 )
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{
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wxLogError(_("Couldn't add an image to the image list."));
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}
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m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.
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m_hotspot = hotspot;
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return (index != -1) ;
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}
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// Create a drag image from an icon and optional cursor
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bool wxDragImage::Create(const wxIcon& image, const wxCursor& cursor, const wxPoint& hotspot)
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{
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if ( m_hImageList )
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ImageList_Destroy((HIMAGELIST) m_hImageList);
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m_hImageList = 0;
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UINT flags = 0;
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bool mask = TRUE; // ?
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if ( mask )
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flags |= ILC_MASK;
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m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);
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HICON hIcon = (HICON) image.GetHICON();
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int index = ImageList_AddIcon((HIMAGELIST) m_hImageList, hIcon);
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if ( index == -1 )
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{
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wxLogError(_("Couldn't add an image to the image list."));
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}
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m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.
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m_hotspot = hotspot;
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return (index != -1) ;
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}
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// Create a drag image from a string and optional cursor
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bool wxDragImage::Create(const wxString& str, const wxCursor& cursor, const wxPoint& hotspot)
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{
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wxFont font(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
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long w, h;
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wxScreenDC dc;
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dc.SetFont(font);
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dc.GetTextExtent(str, & w, & h);
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wxMemoryDC dc2;
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dc2.SetFont(font);
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wxBitmap bitmap((int) w, (int) h);
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dc2.SelectObject(bitmap);
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dc2.SetBackground(* wxWHITE_BRUSH);
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dc2.Clear();
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dc2.DrawText(str, 0, 0);
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dc2.SelectObject(wxNullBitmap);
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return Create(bitmap, cursor, hotspot);
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}
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// Create a drag image for the given tree control item
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bool wxDragImage::Create(const wxTreeCtrl& treeCtrl, wxTreeItemId& id)
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{
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if ( m_hImageList )
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ImageList_Destroy((HIMAGELIST) m_hImageList);
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m_hImageList = (WXHIMAGELIST) TreeView_CreateDragImage((HWND) treeCtrl.GetHWND(), (HTREEITEM) (WXHTREEITEM) id);
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return TRUE;
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}
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// Create a drag image for the given list control item
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bool wxDragImage::Create(const wxListCtrl& listCtrl, long id)
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{
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if ( m_hImageList )
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ImageList_Destroy((HIMAGELIST) m_hImageList);
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POINT pt;
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pt.x = 0; pt.y = 0;
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m_hImageList = (WXHIMAGELIST) ListView_CreateDragImage((HWND) listCtrl.GetHWND(), id, & pt);
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return TRUE;
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}
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// Begin drag
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bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* WXUNUSED(window))
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{
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wxASSERT_MSG( (m_hImageList != 0), "Image list must not be null in BeginDrag.");
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bool ret = (ImageList_BeginDrag((HIMAGELIST) m_hImageList, 0, hotspot.x, hotspot.y) != 0);
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wxASSERT_MSG( (ret), "BeginDrag failed.");
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if (!ret)
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return FALSE;
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if (m_cursor.Ok())
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{
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// First add the cursor to the image list
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int cursorIndex = ImageList_AddIcon((HIMAGELIST) m_hImageList, (HICON) m_cursor.GetHCURSOR());
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wxASSERT_MSG( (cursorIndex != -1), "ImageList_AddIcon failed in BeginDrag.");
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if (cursorIndex != -1)
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{
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ImageList_SetDragCursorImage((HIMAGELIST) m_hImageList, cursorIndex, m_hotspot.x, m_hotspot.y);
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}
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}
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::ShowCursor(FALSE);
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return TRUE;
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}
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// End drag
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bool wxDragImage::EndDrag(wxWindow* WXUNUSED(window))
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{
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wxASSERT_MSG( (m_hImageList != 0), "Image list must not be null in EndDrag.");
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ImageList_EndDrag();
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::ShowCursor(TRUE);
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return TRUE;
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}
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// Move the image: call from OnMouseMove. Pt is in window client coordinates if window
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// is non-NULL, or in screen coordinates if NULL.
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bool wxDragImage::Move(const wxPoint& pt, wxWindow* window)
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{
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wxASSERT_MSG( (m_hImageList != 0), "Image list must not be null in Move.");
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// TODO: what coordinates are these in: window, client, or screen?
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bool ret = (ImageList_DragMove( pt.x, pt.y ) != 0);
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m_position = pt;
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return ret;
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}
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bool wxDragImage::Show(wxWindow* window)
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{
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wxASSERT_MSG( (m_hImageList != 0), "Image list must not be null in Show.");
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HWND hWnd = 0;
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if (window)
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hWnd = (HWND) window->GetHWND();
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bool ret = (ImageList_DragEnter( hWnd, m_position.x, m_position.y ) != 0);
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return ret;
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}
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bool wxDragImage::Hide(wxWindow* window)
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{
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wxASSERT_MSG( (m_hImageList != 0), "Image list must not be null in Hide.");
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HWND hWnd = 0;
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if (window)
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hWnd = (HWND) window->GetHWND();
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bool ret = (ImageList_DragLeave( hWnd ) != 0);
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return ret;
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}
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#endif
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// __WIN95__
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