funny demo

git-svn-id: http://svn2.nishi.boats/svn/milsko/trunk@59 b9cfdab3-6d41-4d17-bbe4-086880011989

GNUmakefile

@@ -35,6 +35,8 @@ L_CFLAGS += -DUSE_X11
 L_OBJS += src/x11.o
 L_LIBS += -lX11
 
+E_LIBS += -lm
+
 SO = .so
 EXEC =
 else ifeq ($(WINDOWS),1)
@@ -47,7 +49,7 @@ SO = .dll
 EXEC = .exe
 endif
 
-EXAMPLES = examples/example$(EXEC)
+EXAMPLES = examples/example$(EXEC) examples/rotate$(EXEC)
 
 .PHONY: all format clean lib examples
 

examples/rotate.c

@@ -0,0 +1,93 @@
+/* $Id$ */
+/* this demo does not work well on windows */
+
+#include <Mw/Milsko.h>
+
+#include <math.h>
+
+#ifndef M_PI
+#define M_PI 3.14159265
+#endif
+
+#define SIZE 100
+
+MwWidget buttons[6];
+double deg = 0;
+
+int ww, wh;
+
+void handler(MwWidget w, void* user, void* client){
+	int i;
+	double cdeg = deg;
+
+	(void)w;
+	(void)user;
+	(void)client;
+
+	for(i = 0; i < (int)(sizeof(buttons) / sizeof(buttons[0])); i++){
+		double rad = cdeg / 180 * M_PI;
+		int x = ww / 2;
+		int y = wh / 2;
+
+		x += cos(rad) * (ww / 2 - SIZE / 2);
+		y += sin(rad) * (wh / 2 - SIZE / 2);
+
+		x -= SIZE / 2;
+		y -= SIZE / 2;
+
+		MwVaApply(buttons[i],
+			MwNx, x,
+			MwNy, y,
+		NULL);
+
+		cdeg += 360 / (sizeof(buttons) / sizeof(buttons[0]));
+	}
+
+	deg += 120.0 / (1000.0 / MwWaitMS);
+}
+
+void resize(MwWidget w, void* user, void* client){
+	(void)w;
+	(void)user;
+	(void)client;
+
+	ww = MwGetInteger(w, MwNwidth);
+	wh = MwGetInteger(w, MwNheight);
+}
+
+int main(){
+	MwWidget window = MwVaCreateWidget(MwWindowClass, "window", NULL, 0, 0, (ww = 500), (wh = 500),
+		MwNtitle, "rotate",
+	NULL);
+	int i;
+
+	for(i = 0; i < (int)(sizeof(buttons) / sizeof(buttons[0])); i++){
+		const char* color = "";
+		char fgcolor[5];
+		int j;
+
+		if(i == 0) color = "#f66";
+		if(i == 1) color = "#6f6";
+		if(i == 2) color = "#ff6";
+		if(i == 3) color = "#66f";
+		if(i == 4) color = "#f6f";
+		if(i == 5) color = "#6ff";
+
+		fgcolor[0] = '#';
+		fgcolor[4] = 0;
+		for(j = 0; j < 3; j++){
+			fgcolor[j + 1] = color[j + 1] == 'f' ? '6' : 'f';
+		}
+
+		buttons[i] = MwVaCreateWidget(MwButtonClass, "button", window, 0, 0, SIZE, SIZE,
+			MwNbackground, color,
+			MwNforeground, fgcolor,
+			MwNtext, "fancy",
+		NULL);
+	}
+
+	MwAddUserHandler(window, MwNtickHandler, handler, NULL);
+	MwAddUserHandler(window, MwNresizeHandler, resize, NULL);
+
+	MwLoop(window);
+}

include/Mw/Core.h

@@ -8,6 +8,8 @@
 #define MwDispatch(x, y) \
 	if(x->widget_class != NULL && x->widget_class->y != NULL) x->widget_class->y(x)
 
+#define MwWaitMS 5
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/Mw/StringDefs.h

@@ -14,5 +14,6 @@
 
 #define MwNactivateHandler "Cactivate"
 #define MwNresizeHandler "Cresize"
+#define MwNtickHandler "Ctick"
 
 #endif

src/core.c

@@ -135,7 +135,9 @@ int MwPending(MwWidget handle) {
 void MwLoop(MwWidget handle) {
 	while(1) {
 		MwStep(handle);
-		MwLLSleep(5);
+
+		MwDispatchUserHandler(handle, MwNtickHandler, NULL);
+		MwLLSleep(MwWaitMS);
 	}
 }
 

src/gdi.c

@@ -13,9 +13,27 @@ static LRESULT CALLBACK wndproc(HWND hWnd, UINT msg, WPARAM wp, LPARAM lp) {
 
 	if(msg == WM_PAINT) {
 		PAINTSTRUCT ps;
-		u->ll->hDC = BeginPaint(hWnd, &ps);
+		RECT	    rc;
+		HBITMAP	    hbmp;
+		HDC	    dc, hbdc;
+
+		GetClientRect(hWnd, &rc);
+
+		dc   = GetDC(hWnd);
+		hbmp = CreateCompatibleBitmap(dc, rc.right - rc.left, rc.bottom - rc.top);
+		hbdc = CreateCompatibleDC(dc);
+		SelectObject(hbdc, hbmp);
+		ReleaseDC(hWnd, dc);
+
+		u->ll->hDC = hbdc;
 		MwLLDispatch(u->ll, draw);
+
+		dc = BeginPaint(hWnd, &ps);
+		StretchBlt(dc, 0, 0, rc.right - rc.left, rc.bottom - rc.top, hbdc, 0, 0, rc.right - rc.left, rc.bottom - rc.top, SRCCOPY);
 		EndPaint(hWnd, &ps);
+
+		DeleteDC(hbdc);
+		DeleteObject(hbmp);
 	} else if(msg == WM_LBUTTONDOWN) {
 		SetCapture(hWnd);
 		MwLLDispatch(u->ll, down);
@@ -127,7 +145,7 @@ MwLLColor MwLLAllocColor(MwLL handle, int r, int g, int b) {
 	c->green = g;
 	c->blue	 = b;
 
-	DeleteDC(dc);
+	ReleaseDC(handle->hWnd, dc);
 
 	return c;
 }