1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef PPAPI_CPP_DEV_ZOOM_DEV_H_ 6 #define PPAPI_CPP_DEV_ZOOM_DEV_H_ 7 8 #include <string> 9 10 #include "ppapi/c/dev/ppp_zoom_dev.h" 11 #include "ppapi/cpp/instance_handle.h" 12 13 namespace pp { 14 15 class Instance; 16 17 // This class allows you to associate the PPP_Zoom_Dev and PPB_Zoom_Dev C-based 18 // interfaces with an object. It associates itself with the given instance, and 19 // registers as the global handler for handling the PPP_Zoom_Dev interface that 20 // the browser calls. 21 // 22 // You would typically use this either via inheritance on your instance: 23 // class MyInstance : public pp::Instance, public pp::Zoom_Dev { 24 // class MyInstance() : pp::Zoom_Dev(this) { 25 // } 26 // ... 27 // }; 28 // 29 // or by composition: 30 // class MyZoom : public pp::Zoom_Dev { 31 // ... 32 // }; 33 // 34 // class MyInstance : public pp::Instance { 35 // MyInstance() : zoom_(this) { 36 // } 37 // 38 // MyZoom zoom_; 39 // }; 40 class Zoom_Dev { 41 public: 42 explicit Zoom_Dev(Instance* instance); 43 virtual ~Zoom_Dev(); 44 45 // PPP_Zoom_Dev functions exposed as virtual functions for you to 46 // override. 47 virtual void Zoom(double factor, bool text_only) = 0; 48 49 // PPB_Zoom_Def functions for you to call to report new zoom factor. 50 void ZoomChanged(double factor); 51 void ZoomLimitsChanged(double minimum_factor, double maximium_factor); 52 53 private: 54 InstanceHandle associated_instance_; 55 }; 56 57 } // namespace pp 58 59 #endif // PPAPI_CPP_DEV_ZOOM_DEV_H_ 60
