projects / wxWidgets.git / blame
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1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: No names yet. | |
| 3 | // Purpose: Contrib. demo | |
| 4 | // Author: Aleksandras Gluchovas | |
| 5 | // Modified by: | |
| 6 | // Created: 19/10/98 | |
| 7 | // RCS-ID: $Id$ | |
| 8 | // Copyright: (c) Aleksandras Gluchovas | |
| 9 | // Licence: wxWindows license | |
| 10 | ///////////////////////////////////////////////////////////////////////////// | |
| 11 | ||
| 12 | #ifndef __GCUPDATESMGR_G__ | |
| 13 | #define __GCUPDATESMGR_G__ | |
| 14 | ||
| 15 | #include "controlbar.h" | |
| 16 | #include "updatesmgr.h" | |
| 17 | ||
| 18 | #include "garbagec.h" | |
| 19 | ||
| 20 | /* | |
| 21 | * class implements optimized logic for refreshing | |
| 22 | * areas of frame layout - which actually need to be updated. | |
| 23 | * Is used as default updates-manager by wxFrameLayout. | |
| 24 | * | |
| 25 | * it is called "Garbage Collecting" u.mgr for it's impelmentation | |
| 26 | * tries to find out dependencies between bars, and to order | |
| 27 | * them ito "hierarchy", this hierarchical sorting resembles | |
| 28 | * impelmenation of heap-garbage collectors, which resolve | |
| 29 | * dependencies between referencs. | |
| 30 | * | |
| 31 | * Example: there are situations where the order of moving | |
| 32 | * the windows does matter: | |
| 33 | * | |
| 34 | * case 1) | |
| 35 | * ------ --- | |
| 36 | * | A | |B| | |
| 37 | * ------ ---> | | | |
| 38 | * --- --- ------ | |
| 39 | * |B| | A | | |
| 40 | * | | ------ | |
| 41 | * --- | |
| 42 | * (future) | |
| 43 | * (past) | |
| 44 | * | |
| 45 | * past/future positions of A and B windows completely overlapp, i.e. | |
| 46 | * depend on each other, and there is not solution for | |
| 47 | * moving the windows witout refereshing both of them, | |
| 48 | * -- we have cyclic dependency here. The gc. alg will | |
| 49 | * find this cyclic dependecy and will force "refresh" | |
| 50 | * after movement. | |
| 51 | * | |
| 52 | * case 2) | |
| 53 | * | |
| 54 | * ------ | |
| 55 | * | A | | |
| 56 | * ------ ---> | |
| 57 | * --- | |
| 58 | * |B| ------ | |
| 59 | * | | | A | | |
| 60 | * --- ------ | |
| 61 | * --- | |
| 62 | * |B| | |
| 63 | * | | | |
| 64 | * --- | |
| 65 | * | |
| 66 | * (future) | |
| 67 | * (past) | |
| 68 | * | |
| 69 | * in this case past/future positions do not overlapp, thus | |
| 70 | * it's enough only to move windows, without refreshing them. | |
| 71 | * GC will "notice" it. | |
| 72 | * | |
| 73 | * there is also third case, when overlapping is partial | |
| 74 | * in this case the refershing can be also avoided by | |
| 75 | * moving windows in the order of "most-dependant" towards the | |
| 76 | * "least-dependent". GC handles this automatically, by | |
| 77 | * sorting windows by their dependency-level (or "hierarchy") | |
| 78 | * | |
| 79 | * See garbagec.h for more details of this method, garbagec.h/cpp | |
| 80 | * implement sorting of generic-depenencies (does not deal | |
| 81 | * with graphical objects directly) | |
| 82 | * | |
| 83 | * Summary: improves performance when complex/large windows are | |
| 84 | * moved around, by reducing number of repaints. Also helps | |
| 85 | * to avoid dirty non-client areas of moved windows | |
| 86 | * in some sepcal cases of "overlapping anomalies" | |
| 87 | */ | |
| 88 | ||
| 89 | class cbGCUpdatesMgr : public cbSimpleUpdatesMgr | |
| 90 | { | |
| 91 | DECLARE_DYNAMIC_CLASS( cbGCUpdatesMgr ) | |
| 92 | protected: | |
| 93 | ||
| 94 | GarbageCollector mGC; | |
| 95 | ||
| 96 | void DoRepositionItems( wxList& items ); | |
| 97 | ||
| 98 | void AddItem( wxList& itemList, | |
| 99 | cbBarInfo* pBar, | |
| 100 | cbDockPane* pPane, | |
| 101 | wxRect& curBounds, | |
| 102 | wxRect& prevBounds ); | |
| 103 | ||
| 104 | public: | |
| 105 | ||
| 106 | cbGCUpdatesMgr(void) {} | |
| 107 | ||
| 108 | cbGCUpdatesMgr( wxFrameLayout* pPanel ); | |
| 109 | ||
| 110 | // notificiactions received from Frame Layout : | |
| 111 | ||
| 112 | virtual void OnStartChanges(); | |
| 113 | ||
| 114 | // refreshes parts of the frame layout, which need an update | |
| 115 | virtual void UpdateNow(); | |
| 116 | }; | |
| 117 | ||
| 118 | #endif |