260 lines
7.6 KiB
C++
260 lines
7.6 KiB
C++
//////////////////////////////////////////////////////////////////////////////
|
|
// Name: wx/generic/dragimgg.h
|
|
// Purpose: wxDragImage class: a kind of a cursor, that can cope
|
|
// with more sophisticated images
|
|
// Author: Julian Smart
|
|
// Modified by:
|
|
// Created: 29/2/2000
|
|
// Copyright: (c) Julian Smart
|
|
// Licence: wxWindows licence
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef _WX_DRAGIMGG_H_
|
|
#define _WX_DRAGIMGG_H_
|
|
|
|
#include "wx/bitmap.h"
|
|
#include "wx/icon.h"
|
|
#include "wx/cursor.h"
|
|
#include "wx/treectrl.h"
|
|
#include "wx/listctrl.h"
|
|
#include "wx/log.h"
|
|
#include "wx/overlay.h"
|
|
|
|
/*
|
|
To use this class, create a wxDragImage when you start dragging, for example:
|
|
|
|
void MyTreeCtrl::OnBeginDrag(wxTreeEvent& event)
|
|
{
|
|
#ifdef __WXMSW__
|
|
::UpdateWindow((HWND) GetHWND()); // We need to implement this in wxWidgets
|
|
#endif
|
|
|
|
CaptureMouse();
|
|
|
|
m_dragImage = new wxDragImage(* this, itemId);
|
|
m_dragImage->BeginDrag(wxPoint(0, 0), this);
|
|
m_dragImage->Move(pt, this);
|
|
m_dragImage->Show(this);
|
|
...
|
|
}
|
|
|
|
In your OnMouseMove function, hide the image, do any display updating required,
|
|
then move and show the image again:
|
|
|
|
void MyTreeCtrl::OnMouseMove(wxMouseEvent& event)
|
|
{
|
|
if (m_dragMode == MY_TREE_DRAG_NONE)
|
|
{
|
|
event.Skip();
|
|
return;
|
|
}
|
|
|
|
// Prevent screen corruption by hiding the image
|
|
if (m_dragImage)
|
|
m_dragImage->Hide(this);
|
|
|
|
// Do some updating of the window, such as highlighting the drop target
|
|
...
|
|
|
|
#ifdef __WXMSW__
|
|
if (updateWindow)
|
|
::UpdateWindow((HWND) GetHWND());
|
|
#endif
|
|
|
|
// Move and show the image again
|
|
m_dragImage->Move(event.GetPosition(), this);
|
|
m_dragImage->Show(this);
|
|
}
|
|
|
|
Eventually we end the drag and delete the drag image.
|
|
|
|
void MyTreeCtrl::OnLeftUp(wxMouseEvent& event)
|
|
{
|
|
...
|
|
|
|
// End the drag and delete the drag image
|
|
if (m_dragImage)
|
|
{
|
|
m_dragImage->EndDrag(this);
|
|
delete m_dragImage;
|
|
m_dragImage = NULL;
|
|
}
|
|
ReleaseMouse();
|
|
}
|
|
*/
|
|
|
|
/*
|
|
* wxGenericDragImage
|
|
*/
|
|
|
|
class WXDLLIMPEXP_CORE wxGenericDragImage: public wxObject
|
|
{
|
|
public:
|
|
|
|
// Ctors & dtor
|
|
////////////////////////////////////////////////////////////////////////////
|
|
|
|
wxGenericDragImage(const wxCursor& cursor = wxNullCursor)
|
|
{
|
|
Init();
|
|
Create(cursor);
|
|
}
|
|
|
|
wxGenericDragImage(const wxBitmap& image, const wxCursor& cursor = wxNullCursor)
|
|
{
|
|
Init();
|
|
|
|
Create(image, cursor);
|
|
}
|
|
|
|
wxGenericDragImage(const wxIcon& image, const wxCursor& cursor = wxNullCursor)
|
|
{
|
|
Init();
|
|
|
|
Create(image, cursor);
|
|
}
|
|
|
|
wxGenericDragImage(const wxString& str, const wxCursor& cursor = wxNullCursor)
|
|
{
|
|
Init();
|
|
|
|
Create(str, cursor);
|
|
}
|
|
|
|
#if wxUSE_TREECTRL
|
|
wxGenericDragImage(const wxTreeCtrl& treeCtrl, wxTreeItemId& id)
|
|
{
|
|
Init();
|
|
|
|
Create(treeCtrl, id);
|
|
}
|
|
#endif
|
|
|
|
#if wxUSE_LISTCTRL
|
|
wxGenericDragImage(const wxListCtrl& listCtrl, long id)
|
|
{
|
|
Init();
|
|
|
|
Create(listCtrl, id);
|
|
}
|
|
#endif
|
|
|
|
virtual ~wxGenericDragImage();
|
|
|
|
// Attributes
|
|
////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifdef wxHAS_NATIVE_OVERLAY
|
|
// backing store is not used when native overlays are
|
|
void SetBackingBitmap(wxBitmap* WXUNUSED(bitmap)) { }
|
|
#else
|
|
// For efficiency, tell wxGenericDragImage to use a bitmap that's already
|
|
// created (e.g. from last drag)
|
|
void SetBackingBitmap(wxBitmap* bitmap) { m_pBackingBitmap = bitmap; }
|
|
#endif // wxHAS_NATIVE_OVERLAY/!wxHAS_NATIVE_OVERLAY
|
|
|
|
// Operations
|
|
////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Create a drag image with a virtual image (need to override DoDrawImage, GetImageRect)
|
|
bool Create(const wxCursor& cursor = wxNullCursor);
|
|
|
|
// Create a drag image from a bitmap and optional cursor
|
|
bool Create(const wxBitmap& image, const wxCursor& cursor = wxNullCursor);
|
|
|
|
// Create a drag image from an icon and optional cursor
|
|
bool Create(const wxIcon& image, const wxCursor& cursor = wxNullCursor);
|
|
|
|
// Create a drag image from a string and optional cursor
|
|
bool Create(const wxString& str, const wxCursor& cursor = wxNullCursor);
|
|
|
|
#if wxUSE_TREECTRL
|
|
// Create a drag image for the given tree control item
|
|
bool Create(const wxTreeCtrl& treeCtrl, wxTreeItemId& id);
|
|
#endif
|
|
|
|
#if wxUSE_LISTCTRL
|
|
// Create a drag image for the given list control item
|
|
bool Create(const wxListCtrl& listCtrl, long id);
|
|
#endif
|
|
|
|
// Begin drag. hotspot is the location of the drag position relative to the upper-left
|
|
// corner of the image.
|
|
bool BeginDrag(const wxPoint& hotspot, wxWindow* window, bool fullScreen = false, wxRect* rect = NULL);
|
|
|
|
// 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 BeginDrag(const wxPoint& hotspot, wxWindow* window, wxWindow* fullScreenRect);
|
|
|
|
// End drag
|
|
bool EndDrag();
|
|
|
|
// Move the image: call from OnMouseMove. Pt is in window client coordinates if window
|
|
// is non-NULL, or in screen coordinates if NULL.
|
|
bool Move(const wxPoint& pt);
|
|
|
|
// Show the image
|
|
bool Show();
|
|
|
|
// Hide the image
|
|
bool Hide();
|
|
|
|
// Implementation
|
|
////////////////////////////////////////////////////////////////////////////
|
|
|
|
void Init();
|
|
|
|
// Override this if you are using a virtual image (drawing your own image)
|
|
virtual wxRect GetImageRect(const wxPoint& pos) const;
|
|
|
|
// Override this if you are using a virtual image (drawing your own image)
|
|
virtual bool DoDrawImage(wxDC& dc, const wxPoint& pos) const;
|
|
|
|
// Override this if you wish to draw the window contents to the backing bitmap
|
|
// yourself. This can be desirable if you wish to avoid flicker by not having to
|
|
// redraw the window itself before dragging in order to be graphic-minus-dragged-objects.
|
|
// Instead, paint the drag image's backing bitmap to be correct, and leave the window
|
|
// to be updated only when dragging the objects away (thus giving a smoother appearance).
|
|
virtual bool UpdateBackingFromWindow(wxDC& windowDC, wxMemoryDC& destDC,
|
|
const wxRect& sourceRect, const wxRect& destRect) const;
|
|
|
|
// Erase and redraw simultaneously if possible
|
|
virtual bool RedrawImage(const wxPoint& oldPos, const wxPoint& newPos, bool eraseOld, bool drawNew);
|
|
|
|
protected:
|
|
wxBitmap m_bitmap;
|
|
wxIcon m_icon;
|
|
wxCursor m_cursor;
|
|
wxCursor m_oldCursor;
|
|
// wxPoint m_hotspot;
|
|
wxPoint m_offset; // The hostpot value passed to BeginDrag
|
|
wxPoint m_position;
|
|
bool m_isDirty;
|
|
bool m_isShown;
|
|
wxWindow* m_window;
|
|
wxDC* m_windowDC;
|
|
|
|
#ifdef wxHAS_NATIVE_OVERLAY
|
|
wxOverlay m_overlay;
|
|
wxDCOverlay* m_dcOverlay;
|
|
#else
|
|
// Stores the window contents while we're dragging the image around
|
|
wxBitmap m_backingBitmap;
|
|
wxBitmap* m_pBackingBitmap; // Pointer to existing backing bitmap
|
|
// (pass to wxGenericDragImage as an efficiency measure)
|
|
// A temporary bitmap for repairing/redrawing
|
|
wxBitmap m_repairBitmap;
|
|
#endif // !wxHAS_NATIVE_OVERLAY
|
|
|
|
wxRect m_boundingRect;
|
|
bool m_fullScreen;
|
|
|
|
private:
|
|
wxDECLARE_DYNAMIC_CLASS(wxGenericDragImage);
|
|
wxDECLARE_NO_COPY_CLASS(wxGenericDragImage);
|
|
};
|
|
|
|
#endif
|
|
// _WX_DRAGIMGG_H_
|