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wxWidgets/src/msw/dragimag.cpp
Vadim Zeitlin 04e2f7e395 wxMSW builds in minimal configuration (i.e. without anything) 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/wxUNIVERSAL@8092 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2000-08-14 11:48:39 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Name: dragimag.cpp
// Purpose: wxDragImage
// Author: Julian Smart
// Modified by:
// Created: 08/04/99
// RCS-ID: $Id$
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "dragimag.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_DRAGIMAG
#if defined(__WIN95__)
#ifndef WX_PRECOMP
#include <stdio.h>
#include "wx/setup.h"
#include "wx/window.h"
#include "wx/dcclient.h"
#include "wx/dcscreen.h"
#include "wx/dcmemory.h"
#include "wx/settings.h"
#endif
#include "wx/msw/private.h"
#include "wx/log.h"
#include "wx/intl.h"
#include "wx/frame.h"
#include "wx/image.h"
#include "wx/msw/dragimag.h"
#include "wx/msw/private.h"
#if defined(__WIN95__) && !(defined(__GNUWIN32_OLD__) || defined(__TWIN32__))
#include <commctrl.h>
#endif
// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------
IMPLEMENT_DYNAMIC_CLASS(wxDragImage, wxObject)
#define GetHimageList() ((HIMAGELIST) m_hImageList)
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// wxDragImage ctors/dtor
// ----------------------------------------------------------------------------
wxDragImage::wxDragImage()
{
Init();
}
wxDragImage::~wxDragImage()
{
if ( m_hImageList )
ImageList_Destroy(GetHimageList());
if ( m_hCursorImageList )
ImageList_Destroy((HIMAGELIST) m_hCursorImageList);
}
void wxDragImage::Init()
{
m_hImageList = 0;
m_hCursorImageList = 0;
m_window = (wxWindow*) NULL;
m_fullScreen = FALSE;
}
// Attributes
////////////////////////////////////////////////////////////////////////////
// Operations
////////////////////////////////////////////////////////////////////////////
// Create a drag image from a bitmap and optional cursor
bool wxDragImage::Create(const wxBitmap& image, const wxCursor& cursor, const wxPoint& hotspot)
{
if ( m_hImageList )
ImageList_Destroy(GetHimageList());
m_hImageList = 0;
UINT flags = 0 ;
if (image.GetDepth() <= 4)
flags = ILC_COLOR4;
else if (image.GetDepth() <= 8)
flags = ILC_COLOR8;
else if (image.GetDepth() <= 16)
flags = ILC_COLOR16;
else if (image.GetDepth() <= 24)
flags = ILC_COLOR24;
else
flags = ILC_COLOR32;
bool mask = (image.GetMask() != 0);
if ( mask )
flags |= ILC_MASK;
m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);
int index;
if (!mask)
{
HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
index = ImageList_Add(GetHimageList(), hBitmap1, 0);
}
else
{
HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
HBITMAP hBitmap2 = (HBITMAP) image.GetMask()->GetMaskBitmap();
HBITMAP hbmpMask = wxInvertMask(hBitmap2);
index = ImageList_Add(GetHimageList(), hBitmap1, hbmpMask);
::DeleteObject(hbmpMask);
}
if ( index == -1 )
{
wxLogError(_("Couldn't add an image to the image list."));
}
m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.
m_hotspot = hotspot;
return (index != -1) ;
}
// Create a drag image from an icon and optional cursor
bool wxDragImage::Create(const wxIcon& image, const wxCursor& cursor, const wxPoint& hotspot)
{
if ( m_hImageList )
ImageList_Destroy(GetHimageList());
m_hImageList = 0;
UINT flags = 0 ;
if (image.GetDepth() <= 4)
flags = ILC_COLOR4;
else if (image.GetDepth() <= 8)
flags = ILC_COLOR8;
else if (image.GetDepth() <= 16)
flags = ILC_COLOR16;
else if (image.GetDepth() <= 24)
flags = ILC_COLOR24;
else
flags = ILC_COLOR32;
bool mask = TRUE;
if ( mask )
flags |= ILC_MASK;
m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);
HICON hIcon = (HICON) image.GetHICON();
int index = ImageList_AddIcon(GetHimageList(), hIcon);
if ( index == -1 )
{
wxLogError(_("Couldn't add an image to the image list."));
}
m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.
m_hotspot = hotspot;
return (index != -1) ;
}
// Create a drag image from a string and optional cursor
bool wxDragImage::Create(const wxString& str, const wxCursor& cursor, const wxPoint& hotspot)
{
wxFont font(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
long w, h;
wxScreenDC dc;
dc.SetFont(font);
dc.GetTextExtent(str, & w, & h);
dc.SetFont(wxNullFont);
wxMemoryDC dc2;
dc2.SetFont(font);
wxBitmap bitmap((int) w+2, (int) h+2);
dc2.SelectObject(bitmap);
dc2.SetBackground(* wxWHITE_BRUSH);
dc2.Clear();
dc2.SetBackgroundMode(wxTRANSPARENT);
dc2.SetTextForeground(* wxLIGHT_GREY);
dc2.DrawText(str, 0, 0);
dc2.DrawText(str, 1, 0);
dc2.DrawText(str, 2, 0);
dc2.DrawText(str, 1, 1);
dc2.DrawText(str, 2, 1);
dc2.DrawText(str, 1, 2);
dc2.DrawText(str, 2, 2);
dc2.SetTextForeground(* wxBLACK);
dc2.DrawText(str, 1, 1);
dc2.SelectObject(wxNullBitmap);
// Make the bitmap masked
wxImage image(bitmap);
image.SetMaskColour(255, 255, 255);
bitmap = image.ConvertToBitmap();
return Create(bitmap, cursor, hotspot);
}
// Create a drag image for the given tree control item
bool wxDragImage::Create(const wxTreeCtrl& treeCtrl, wxTreeItemId& id)
{
if ( m_hImageList )
ImageList_Destroy(GetHimageList());
m_hImageList = (WXHIMAGELIST) TreeView_CreateDragImage((HWND) treeCtrl.GetHWND(), (HTREEITEM) (WXHTREEITEM) id);
return TRUE;
}
// Create a drag image for the given list control item
bool wxDragImage::Create(const wxListCtrl& listCtrl, long id)
{
if ( m_hImageList )
ImageList_Destroy(GetHimageList());
POINT pt;
pt.x = 0; pt.y = 0;
m_hImageList = (WXHIMAGELIST) ListView_CreateDragImage((HWND) listCtrl.GetHWND(), id, & pt);
return TRUE;
}
// Begin drag
bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, bool fullScreen, wxRect* rect)
{
wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in BeginDrag."));
wxASSERT_MSG( (window != 0), wxT("Window must not be null in BeginDrag."));
m_fullScreen = fullScreen;
if (rect)
m_boundingRect = * rect;
bool ret = (ImageList_BeginDrag(GetHimageList(), 0, hotspot.x, hotspot.y) != 0);
if (!ret)
{
wxFAIL_MSG( _T("BeginDrag failed.") );
return FALSE;
}
if (m_cursor.Ok())
{
if (!m_hCursorImageList)
{
int cxCursor = GetSystemMetrics(SM_CXCURSOR);
int cyCursor = GetSystemMetrics(SM_CYCURSOR);
m_hCursorImageList = (WXHIMAGELIST) ImageList_Create(cxCursor, cyCursor, ILC_MASK, 1, 1);
}
// First add the cursor to the image list
HCURSOR hCursor = (HCURSOR) m_cursor.GetHCURSOR();
int cursorIndex = ImageList_AddIcon((HIMAGELIST) m_hCursorImageList, (HICON) hCursor);
wxASSERT_MSG( (cursorIndex != -1), wxT("ImageList_AddIcon failed in BeginDrag."));
if (cursorIndex != -1)
{
ImageList_SetDragCursorImage((HIMAGELIST) m_hCursorImageList, cursorIndex, m_hotspot.x, m_hotspot.y);
}
}
m_window = window;
::ShowCursor(FALSE);
::SetCapture(GetHwndOf(window));
return TRUE;
}
// Begin drag. hotspot is the location of the drag position relative to the upper-left
// corner of the image. This is full screen only. fullScreenRect gives the
// position of the window on the screen, to restrict the drag to.
bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, wxWindow* fullScreenRect)
{
wxRect rect;
int x = fullScreenRect->GetPosition().x;
int y = fullScreenRect->GetPosition().y;
wxSize sz = fullScreenRect->GetSize();
if (fullScreenRect->GetParent() && !fullScreenRect->IsKindOf(CLASSINFO(wxFrame)))
fullScreenRect->GetParent()->ClientToScreen(& x, & y);
rect.x = x; rect.y = y;
rect.width = sz.x; rect.height = sz.y;
return BeginDrag(hotspot, window, TRUE, & rect);
}
// End drag
bool wxDragImage::EndDrag()
{
wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in EndDrag."));
ImageList_EndDrag();
if ( !::ReleaseCapture() )
{
wxLogLastError(wxT("ReleaseCapture"));
}
::ShowCursor(TRUE);
m_window = (wxWindow*) NULL;
return TRUE;
}
// Move the image: call from OnMouseMove. Pt is in window client coordinates if window
// is non-NULL, or in screen coordinates if NULL.
bool wxDragImage::Move(const wxPoint& pt)
{
wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Move."));
// TODO: what coordinates are these in: window, client, or screen?
bool ret = (ImageList_DragMove( pt.x, pt.y ) != 0);
m_position = pt;
return ret;
}
bool wxDragImage::Show()
{
wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Show."));
HWND hWnd = 0;
if (m_window && !m_fullScreen)
hWnd = (HWND) m_window->GetHWND();
bool ret = (ImageList_DragEnter( hWnd, m_position.x, m_position.y ) != 0);
return ret;
}
bool wxDragImage::Hide()
{
wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Hide."));
HWND hWnd = 0;
if (m_window && !m_fullScreen)
hWnd = (HWND) m_window->GetHWND();
bool ret = (ImageList_DragLeave( hWnd ) != 0);
return ret;
}
#endif
// __WIN95__
#endif // wxUSE_DRAGIMAG
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