1*3334a7e6SAndrew Rist /************************************************************** 2cdf0e10cSrcweir * 3*3334a7e6SAndrew Rist * Licensed to the Apache Software Foundation (ASF) under one 4*3334a7e6SAndrew Rist * or more contributor license agreements. See the NOTICE file 5*3334a7e6SAndrew Rist * distributed with this work for additional information 6*3334a7e6SAndrew Rist * regarding copyright ownership. The ASF licenses this file 7*3334a7e6SAndrew Rist * to you under the Apache License, Version 2.0 (the 8*3334a7e6SAndrew Rist * "License"); you may not use this file except in compliance 9*3334a7e6SAndrew Rist * with the License. You may obtain a copy of the License at 10*3334a7e6SAndrew Rist * 11*3334a7e6SAndrew Rist * http://www.apache.org/licenses/LICENSE-2.0 12*3334a7e6SAndrew Rist * 13*3334a7e6SAndrew Rist * Unless required by applicable law or agreed to in writing, 14*3334a7e6SAndrew Rist * software distributed under the License is distributed on an 15*3334a7e6SAndrew Rist * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*3334a7e6SAndrew Rist * KIND, either express or implied. See the License for the 17*3334a7e6SAndrew Rist * specific language governing permissions and limitations 18*3334a7e6SAndrew Rist * under the License. 19*3334a7e6SAndrew Rist * 20*3334a7e6SAndrew Rist *************************************************************/ 21*3334a7e6SAndrew Rist 22*3334a7e6SAndrew Rist 23cdf0e10cSrcweir 24cdf0e10cSrcweir #ifndef _SVX_ACCESSIBILITY_IACCESSIBLE_VIEW_FORWARDER_LISTENER_HXX 25cdf0e10cSrcweir #define _SVX_ACCESSIBILITY_IACCESSIBLE_VIEW_FORWARDER_LISTENER_HXX 26cdf0e10cSrcweir 27cdf0e10cSrcweir #include <sal/types.h> 28cdf0e10cSrcweir #include <tools/gen.hxx> 29cdf0e10cSrcweir 30cdf0e10cSrcweir 31cdf0e10cSrcweir namespace accessibility { 32cdf0e10cSrcweir 33cdf0e10cSrcweir class IAccessibleViewForwarder; 34cdf0e10cSrcweir 35cdf0e10cSrcweir /** <p>The purpose of this interface is to notify a user of an 36cdf0e10cSrcweir IAccessibleViewForwarder when that view forwarder changes its 37cdf0e10cSrcweir properties. Such a change may be one of the following: 38cdf0e10cSrcweir <ul> 39cdf0e10cSrcweir <li>Change of the coordinate transformation.</li> 40cdf0e10cSrcweir <li>Change of the visible area (which in turn results in a change of the 41cdf0e10cSrcweir coordinate transformation.</li> 42cdf0e10cSrcweir <li>Change of the validity state of the view forwarder.</li> 43cdf0e10cSrcweir */ 44cdf0e10cSrcweir class IAccessibleViewForwarderListener 45cdf0e10cSrcweir { 46cdf0e10cSrcweir public: 47cdf0e10cSrcweir /** Enumeration of the different change types. 48cdf0e10cSrcweir */ 49cdf0e10cSrcweir enum ChangeType {TRANSFORMATION, VISIBLE_AREA, STATE}; 50cdf0e10cSrcweir 51cdf0e10cSrcweir /** This method is called to indicate a change of the specified view 52cdf0e10cSrcweir forwarder. 53cdf0e10cSrcweir @param aChangeType 54cdf0e10cSrcweir The type of the change. TRANSFORMATION indicates a change of 55cdf0e10cSrcweir the coordinate transformation with a constant visible area. If 56cdf0e10cSrcweir the visible area changes, just use VISIBLE_AREA. This changes 57cdf0e10cSrcweir the transformation implicitly. The value STATE indicates a 58cdf0e10cSrcweir change of the validity state. Check the IsValid method of the 59cdf0e10cSrcweir view forwarder before doing further calls. 60cdf0e10cSrcweir @param pViewForwarder 61cdf0e10cSrcweir The modified view forwarder. It is specified just in case that 62cdf0e10cSrcweir there is more than one view forwarder in use at the same time. 63cdf0e10cSrcweir */ 64cdf0e10cSrcweir virtual void ViewForwarderChanged (ChangeType aChangeType, 65cdf0e10cSrcweir const IAccessibleViewForwarder* pViewForwarder) = 0; 66cdf0e10cSrcweir }; 67cdf0e10cSrcweir 68cdf0e10cSrcweir } // end of namespace accessibility 69cdf0e10cSrcweir 70cdf0e10cSrcweir #endif 71