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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #ifndef INCLUDED_CANVAS_BUFFEREDGRAPHICDEVICEBASE_HXX
21 : #define INCLUDED_CANVAS_BUFFEREDGRAPHICDEVICEBASE_HXX
22 :
23 : #include <com/sun/star/awt/XWindow2.hpp>
24 : #include <com/sun/star/awt/XTopWindow.hpp>
25 : #include <com/sun/star/awt/XWindowListener.hpp>
26 :
27 : #include <canvas/canvastools.hxx>
28 : #include <canvas/base/graphicdevicebase.hxx>
29 :
30 :
31 : /* Definition of BufferedGraphicDeviceBase class */
32 :
33 : namespace canvas
34 : {
35 : /** Helper template base class for XGraphicDevice implementations
36 : on windows.
37 :
38 : Use this base class if your target device is a
39 : window. Additionally to GraphicDeviceBase, this template
40 : provides an implementation of the awt::XWindowListener
41 : interface, to receive notifications about state changes of the
42 : associated window.
43 :
44 : @tpl Base
45 : Base class to use, most probably one of the
46 : WeakComponentImplHelperN templates with the appropriate
47 : interfaces. At least XGraphicDevice should be among them (why else
48 : would you use this template, then?). Base class must have an
49 : Base( const Mutex& ) constructor (like the
50 : WeakComponentImplHelperN templates have). As the very least,
51 : the base class must be derived from uno::XInterface, as some
52 : error reporting mechanisms rely on that.
53 :
54 : @tpl DeviceHelper
55 : Device helper implementation for the backend in question. This
56 : object will be held as a member of this template class, and
57 : basically gets forwarded all XGraphicDevice API calls that
58 : could not be handled generically.
59 :
60 : @tpl Mutex
61 : Lock strategy to use. Defaults to using the
62 : OBaseMutex-provided lock. Everytime one of the methods is
63 : entered, an object of type Mutex is created with m_aMutex as
64 : the sole parameter, and destroyed again when the method scope
65 : is left.
66 :
67 : @tpl UnambiguousBase
68 : Optional unambiguous base class for XInterface of Base. It's
69 : sometimes necessary to specify this parameter, e.g. if Base
70 : derives from multiple UNO interface (were each provides its
71 : own version of XInterface, making the conversion ambiguous)
72 : */
73 : template< class Base,
74 : class DeviceHelper,
75 : class Mutex=::osl::MutexGuard,
76 0 : class UnambiguousBase=::com::sun::star::uno::XInterface > class BufferedGraphicDeviceBase :
77 : public GraphicDeviceBase< Base, DeviceHelper, Mutex, UnambiguousBase >
78 : {
79 : public:
80 : typedef GraphicDeviceBase< Base, DeviceHelper, Mutex, UnambiguousBase > BaseType;
81 : typedef BufferedGraphicDeviceBase OurType;
82 : typedef Mutex MutexType;
83 :
84 0 : BufferedGraphicDeviceBase() :
85 : mxWindow(),
86 : maBounds(),
87 : mbIsVisible( false ),
88 0 : mbIsTopLevel( false )
89 : {
90 0 : BaseType::maPropHelper.addProperties( PropertySetHelper::MakeMap
91 : ("Window",
92 : boost::bind(&OurType::getXWindow,
93 : this)));
94 0 : }
95 :
96 : // XGraphicDevice
97 0 : virtual ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XBufferController > SAL_CALL getBufferController( ) throw (::com::sun::star::uno::RuntimeException)
98 : {
99 0 : return this;
100 : }
101 :
102 : // XBufferController
103 0 : virtual ::sal_Int32 SAL_CALL createBuffers( ::sal_Int32 nBuffers ) throw (::com::sun::star::lang::IllegalArgumentException,
104 : ::com::sun::star::uno::RuntimeException)
105 : {
106 0 : tools::verifyRange( nBuffers, (sal_Int32)1 );
107 :
108 0 : MutexType aGuard( BaseType::m_aMutex );
109 :
110 0 : return BaseType::maDeviceHelper.createBuffers( nBuffers );
111 : }
112 :
113 0 : virtual void SAL_CALL destroyBuffers( ) throw (::com::sun::star::uno::RuntimeException)
114 : {
115 0 : MutexType aGuard( BaseType::m_aMutex );
116 :
117 0 : BaseType::maDeviceHelper.destroyBuffers();
118 0 : }
119 :
120 0 : virtual ::sal_Bool SAL_CALL showBuffer( ::sal_Bool bUpdateAll ) throw (::com::sun::star::uno::RuntimeException)
121 : {
122 0 : MutexType aGuard( BaseType::m_aMutex );
123 :
124 0 : return BaseType::maDeviceHelper.showBuffer( mbIsVisible, bUpdateAll );
125 : }
126 :
127 0 : virtual ::sal_Bool SAL_CALL switchBuffer( ::sal_Bool bUpdateAll ) throw (::com::sun::star::uno::RuntimeException)
128 : {
129 0 : MutexType aGuard( BaseType::m_aMutex );
130 :
131 0 : return BaseType::maDeviceHelper.switchBuffer( mbIsVisible, bUpdateAll );
132 : }
133 :
134 :
135 : /** Set corresponding canvas window
136 :
137 : Use this method to set the window this canvas displays
138 : on. Comes in handy when the canvas needs to adapt size or
139 : output position to the changing window.
140 :
141 : Whenever the bounds of the window change, <code>void
142 : notifySizeUpdate( const awt::Rectangle& rBounds )</code>
143 : is called, with rBounds the window bound rect relative to
144 : the frame window.
145 : */
146 0 : void setWindow( const ::com::sun::star::uno::Reference<
147 : ::com::sun::star::awt::XWindow2 >& rWindow )
148 : {
149 0 : if( mxWindow.is() )
150 0 : mxWindow->removeWindowListener( this );
151 :
152 0 : mxWindow = rWindow;
153 :
154 0 : if( mxWindow.is() )
155 : {
156 0 : mbIsVisible = mxWindow->isVisible();
157 0 : mbIsTopLevel =
158 : ::com::sun::star::uno::Reference< ::com::sun::star::awt::XTopWindow >(
159 : mxWindow,
160 : ::com::sun::star::uno::UNO_QUERY ).is();
161 :
162 0 : maBounds = transformBounds( mxWindow->getPosSize() );
163 0 : mxWindow->addWindowListener( this );
164 : }
165 0 : }
166 :
167 : ::com::sun::star::uno::Reference< ::com::sun::star::awt::XWindow2 > getWindow() const
168 : {
169 : return mxWindow;
170 : }
171 :
172 0 : ::com::sun::star::uno::Any getXWindow() const
173 : {
174 0 : return ::com::sun::star::uno::makeAny(mxWindow);
175 : }
176 :
177 0 : virtual void disposeThis()
178 : {
179 0 : typename BaseType::MutexType aGuard( BaseType::m_aMutex );
180 :
181 0 : if( mxWindow.is() )
182 : {
183 0 : mxWindow->removeWindowListener(this);
184 0 : mxWindow.clear();
185 : }
186 :
187 : // pass on to base class
188 0 : BaseType::disposeThis();
189 0 : }
190 :
191 0 : ::com::sun::star::awt::Rectangle transformBounds( const ::com::sun::star::awt::Rectangle& rBounds )
192 : {
193 : // notifySizeUpdate's bounds are relative to the toplevel
194 : // window
195 0 : if( !mbIsTopLevel )
196 : return tools::getAbsoluteWindowRect(
197 : rBounds,
198 0 : mxWindow );
199 : else
200 0 : return ::com::sun::star::awt::Rectangle( 0,0,rBounds.Width,rBounds.Height );
201 : }
202 :
203 0 : void boundsChanged( const ::com::sun::star::awt::WindowEvent& e )
204 : {
205 0 : typename BaseType::MutexType aGuard( BaseType::m_aMutex );
206 :
207 : const ::com::sun::star::awt::Rectangle& rNewBounds(
208 : transformBounds(
209 : ::com::sun::star::awt::Rectangle( e.X,
210 : e.Y,
211 : e.Width,
212 0 : e.Height )));
213 :
214 0 : if( rNewBounds.X != maBounds.X ||
215 : rNewBounds.Y != maBounds.Y ||
216 : rNewBounds.Width != maBounds.Width ||
217 : rNewBounds.Height != maBounds.Height )
218 : {
219 0 : maBounds = rNewBounds;
220 0 : BaseType::maDeviceHelper.notifySizeUpdate( maBounds );
221 : }
222 0 : }
223 :
224 : // XWindowListener
225 0 : virtual void disposeEventSource( const ::com::sun::star::lang::EventObject& Source ) throw (::com::sun::star::uno::RuntimeException)
226 : {
227 0 : typename BaseType::MutexType aGuard( BaseType::m_aMutex );
228 :
229 0 : if( Source.Source == mxWindow )
230 0 : mxWindow.clear();
231 :
232 0 : BaseType::disposeEventSource(Source);
233 0 : }
234 :
235 0 : virtual void SAL_CALL windowResized( const ::com::sun::star::awt::WindowEvent& e ) throw (::com::sun::star::uno::RuntimeException)
236 : {
237 0 : boundsChanged( e );
238 0 : }
239 :
240 0 : virtual void SAL_CALL windowMoved( const ::com::sun::star::awt::WindowEvent& e ) throw (::com::sun::star::uno::RuntimeException)
241 : {
242 0 : boundsChanged( e );
243 0 : }
244 :
245 0 : virtual void SAL_CALL windowShown( const ::com::sun::star::lang::EventObject& ) throw (::com::sun::star::uno::RuntimeException)
246 : {
247 0 : typename BaseType::MutexType aGuard( BaseType::m_aMutex );
248 :
249 0 : mbIsVisible = true;
250 0 : }
251 :
252 0 : virtual void SAL_CALL windowHidden( const ::com::sun::star::lang::EventObject& ) throw (::com::sun::star::uno::RuntimeException)
253 : {
254 0 : typename BaseType::MutexType aGuard( BaseType::m_aMutex );
255 :
256 0 : mbIsVisible = false;
257 0 : }
258 :
259 : protected:
260 : ::com::sun::star::uno::Reference< ::com::sun::star::awt::XWindow2 > mxWindow;
261 :
262 : /// Current bounds of the owning Window
263 : ::com::sun::star::awt::Rectangle maBounds;
264 :
265 : /// True, if the window this canvas is contained in, is visible
266 : bool mbIsVisible;
267 :
268 : private:
269 : /// True, if the window this canvas is contained in, is a toplevel window
270 : bool mbIsTopLevel;
271 : };
272 : }
273 :
274 : #endif /* INCLUDED_CANVAS_BUFFEREDGRAPHICDEVICEBASE_HXX */
275 :
276 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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