1/////////////////////////////////////////////////////////////////////////////
2// Name:        src/cocoa/dcclient.mm
3// Purpose:     wxWindowDCImpl, wxPaintDCImpl, and wxClientDCImpl classes
4// Author:      David Elliott
5// Modified by:
6// Created:     2003/04/01
7// Copyright:   (c) 2003 David Elliott
8// Licence:   	wxWindows licence
9/////////////////////////////////////////////////////////////////////////////
10
11#include "wx/wxprec.h"
12#ifndef WX_PRECOMP
13    #include "wx/log.h"
14    #include "wx/window.h"
15#endif //WX_PRECOMP
16
17#include "wx/cocoa/dcclient.h"
18
19#import <AppKit/NSView.h>
20#import <AppKit/NSAffineTransform.h>
21#import <AppKit/NSColor.h>
22#import <AppKit/NSGraphicsContext.h>
23#import <AppKit/NSBezierPath.h>
24#import <AppKit/NSWindow.h>
25
26/*
27 * wxWindowDCImpl
28 */
29IMPLEMENT_ABSTRACT_CLASS(wxWindowDCImpl, wxCocoaDCImpl)
30
31wxWindowDCImpl::wxWindowDCImpl(wxDC *owner)
32:   wxCocoaDCImpl(owner)
33,   m_window(NULL)
34,   m_lockedNSView(NULL)
35{
36};
37
38wxWindowDCImpl::wxWindowDCImpl(wxDC *owner, wxWindow *window)
39:   wxCocoaDCImpl(owner)
40,   m_window(window)
41,   m_lockedNSView(NULL)
42{
43    wxLogDebug(wxT("non-client window DC's are not supported, oh well"));
44};
45
46wxWindowDCImpl::~wxWindowDCImpl(void)
47{
48    CocoaUnwindStackAndLoseFocus();
49};
50
51bool wxWindowDCImpl::CocoaLockFocusOnNSView(WX_NSView nsview)
52{
53    if([nsview lockFocusIfCanDraw])
54    {
55        sm_cocoaDCStack.Insert(this);
56        CocoaApplyTransformations();
57        m_lockedNSView = nsview;
58        return true;
59    }
60    wxLogDebug(wxT("focus lock failed!"));
61    return false;
62}
63
64bool wxWindowDCImpl::CocoaUnlockFocusOnNSView()
65{
66    [[m_lockedNSView window] flushWindow];
67    [m_lockedNSView unlockFocus];
68    m_lockedNSView = NULL;
69    return true;
70}
71
72bool wxWindowDCImpl::CocoaLockFocus()
73{
74    wxLogTrace(wxTRACE_COCOA,wxT("Locking focus on wxWindowDCImpl=%p, NSView=%p"),this, m_window->GetNonClientNSView());
75    NSAffineTransform *newTransform = CocoaGetWxToBoundsTransform([m_window->GetNonClientNSView() isFlipped], [m_window->GetNonClientNSView() bounds].size.height);
76    [newTransform retain];
77    [m_cocoaWxToBoundsTransform release];
78    m_cocoaWxToBoundsTransform = newTransform;
79    return CocoaLockFocusOnNSView(m_window->GetNonClientNSView());
80}
81
82bool wxWindowDCImpl::CocoaUnlockFocus()
83{
84    wxLogTrace(wxTRACE_COCOA,wxT("Unlocking focus on wxWindowDCImpl=%p, NSView=%p"),this, m_window->GetNonClientNSView());
85    return CocoaUnlockFocusOnNSView();
86}
87
88bool wxWindowDCImpl::CocoaGetBounds(void *rectData)
89{
90    if(!rectData)
91        return false;
92    if(!m_lockedNSView)
93        return false;
94    NSRect *pRect = (NSRect*)rectData;
95    *pRect = [m_lockedNSView bounds];
96    return true;
97}
98
99/*
100 * wxClientDCImpl
101 */
102IMPLEMENT_ABSTRACT_CLASS(wxClientDCImpl, wxWindowDCImpl)
103
104wxClientDCImpl::wxClientDCImpl(wxDC *owner)
105:   wxWindowDCImpl(owner)
106{
107};
108
109wxClientDCImpl::wxClientDCImpl(wxDC *owner, wxWindow *window)
110:   wxWindowDCImpl(owner)
111{
112    m_window = window;
113};
114
115wxClientDCImpl::~wxClientDCImpl(void)
116{
117    CocoaUnwindStackAndLoseFocus();
118};
119
120bool wxClientDCImpl::CocoaLockFocus()
121{
122    wxLogTrace(wxTRACE_COCOA,wxT("Locking focus on wxClientDCImpl=%p, NSView=%p"),this, m_window->GetNSView());
123    NSAffineTransform *newTransform = m_window->CocoaGetWxToBoundsTransform();
124    [newTransform retain];
125    [m_cocoaWxToBoundsTransform release];
126    m_cocoaWxToBoundsTransform = newTransform;
127    return CocoaLockFocusOnNSView(m_window->GetNSView());
128}
129
130bool wxClientDCImpl::CocoaUnlockFocus()
131{
132    wxLogTrace(wxTRACE_COCOA,wxT("Unlocking focus on wxClientDCImpl=%p, NSView=%p"),this, m_window->GetNSView());
133    return CocoaUnlockFocusOnNSView();
134}
135
136/*
137 * wxPaintDCImpl
138 */
139IMPLEMENT_ABSTRACT_CLASS(wxPaintDCImpl, wxWindowDCImpl)
140
141wxPaintDCImpl::wxPaintDCImpl(wxDC *owner)
142:   wxWindowDCImpl(owner)
143{
144};
145
146wxPaintDCImpl::wxPaintDCImpl(wxDC *owner, wxWindow *window)
147:   wxWindowDCImpl(owner)
148{
149    m_window = window;
150    wxASSERT_MSG([NSView focusView]==window->GetNSView(), wxT("PaintDC's NSView does not have focus.  Please use wxPaintDCImpl only as the first DC created in a paint handler"));
151    sm_cocoaDCStack.Insert(this);
152    m_lockedNSView = window->GetNSView();
153    NSAffineTransform *newTransform = window->CocoaGetWxToBoundsTransform();
154    [newTransform retain];
155    [m_cocoaWxToBoundsTransform release];
156    m_cocoaWxToBoundsTransform = newTransform;
157    CocoaApplyTransformations();
158};
159
160wxPaintDCImpl::~wxPaintDCImpl(void)
161{
162    CocoaUnwindStackAndLoseFocus();
163};
164
165bool wxPaintDCImpl::CocoaLockFocus()
166{
167    wxFAIL_MSG(wxT("wxPaintDCImpl cannot be asked to lock focus!"));
168    return false;
169}
170
171bool wxPaintDCImpl::CocoaUnlockFocus()
172{
173    // wxPaintDCImpl focus can never be unlocked.
174    return false;
175}
176
177