1#include <stdio.h> 2 3#include <Application.h> 4#include <Region.h> 5#include <View.h> 6#include <Window.h> 7 8enum { 9 MSG_REDRAW = 'shhd' 10}; 11 12#define TEST_DELAYS 0 13 14class View : public BView { 15public: 16 View(BRect frame, uint8 r, uint8 g, uint8 b, uint8 a) 17 : BView(frame, "view", B_FOLLOW_ALL, B_WILL_DRAW) 18 { 19 SetDrawingMode(B_OP_ALPHA); 20 SetHighColor(r, g, b, a); 21 } 22 23 virtual void Draw(BRect updateRect) 24 { 25 BRegion region; 26 GetClippingRegion(®ion); 27 BMessage message(MSG_REDRAW); 28 int32 count = region.CountRects(); 29 for (int32 i = 0; i < count; i++) 30 message.AddRect("rect", region.RectAt(i)); 31 be_app->PostMessage(&message); 32 } 33 34 void AsyncRedraw(BRegion& region) 35 { 36 if (!LockLooper()) 37 return; 38 39#if 0 40 ConstrainClippingRegion(®ion); 41 FillRect(Bounds()); 42 ConstrainClippingRegion(NULL); 43#else 44 PushState(); 45 ConstrainClippingRegion(®ion); 46 FillRect(Bounds()); 47 PopState(); 48#endif 49 50 UnlockLooper(); 51 } 52}; 53 54 55class Application : public BApplication { 56public: 57 Application() 58 : BApplication("application/x-vnd.stippi-async.drawing") 59 , fDelay(true) 60 { 61 BWindow* window = new BWindow(BRect(50, 50, 350, 250), 62 "Test Window", B_TITLED_WINDOW_LOOK, B_NORMAL_WINDOW_FEEL, 63 B_QUIT_ON_WINDOW_CLOSE); 64 fView = new View(window->Bounds(), 255, 80, 155, 128); 65 window->AddChild(fView); 66 window->Show(); 67 68 window = new BWindow(BRect(150, 150, 450, 350), 69 "Drag Window", B_TITLED_WINDOW_LOOK, B_NORMAL_WINDOW_FEEL, 70 B_QUIT_ON_WINDOW_CLOSE); 71 window->Show(); 72 73 SetPulseRate(100000); 74 } 75 76 virtual void Pulse() 77 { 78 fDelay = true; 79 } 80 81 virtual void MessageReceived(BMessage* message) 82 { 83 switch (message->what) { 84 case MSG_REDRAW: 85 { 86#if TEST_DELAYS 87 if (fDelay) { 88 snooze(200000); 89 fDelay = false; 90 } 91#endif 92 BRegion region; 93 BRect rect; 94 for (int32 i = 0; 95 message->FindRect("rect", i, &rect) == B_OK; i++) 96 region.Include(rect); 97 fView->AsyncRedraw(region); 98 break; 99 } 100 101 default: 102 BApplication::MessageReceived(message); 103 break; 104 } 105 } 106private: 107 View* fView; 108 bool fDelay; 109}; 110 111 112int 113main(int argc, char* argv[]) 114{ 115 Application app; 116 app.Run(); 117 return 0; 118} 119 120 121