Adding comments to graph demo

1 files changed, 67 insertions, 60 deletions

diff --git a/demos/modules/gwin/graph/main.c b/demos/modules/gwin/graph/main.c
index 4273b750..e0d82271 100644
--- a/demos/modules/gwin/graph/main.c
+++ b/demos/modules/gwin/graph/main.c
@@ -30,75 +30,82 @@
 #include "gfx.h"
 #include "math.h"
 
+// A set of data points that will be displayed in the graph
 static const point data[5] = {
-	{ -40, -40 },
-	{ 70, 40 },
-	{ 140, 60 },
-	{ 210, 60 },
-	{ 280, 200 }
+    { -40, -40 },
+    { 70, 40 },
+    { 140, 60 },
+    { 210, 60 },
+    { 280, 200 }
 };
 
-static GGraphObject	g;
-
+// A graph styling
 static GGraphStyle GraphStyle1 = {
-	{ GGRAPH_POINT_DOT, 0, Blue },			// point
-	{ GGRAPH_LINE_NONE, 2, Gray },			// line
-	{ GGRAPH_LINE_SOLID, 0, White },		// x axis
-	{ GGRAPH_LINE_SOLID, 0, White },		// y axis
-	{ GGRAPH_LINE_DASH, 5, Gray, 50 },		// x grid
-	{ GGRAPH_LINE_DOT, 7, Yellow, 50 },		// y grid
-	GWIN_GRAPH_STYLE_POSITIVE_AXIS_ARROWS	// flags
+    { GGRAPH_POINT_DOT, 0, Blue },          // Point
+    { GGRAPH_LINE_NONE, 2, Gray },          // Line
+    { GGRAPH_LINE_SOLID, 0, White },        // X axis
+    { GGRAPH_LINE_SOLID, 0, White },        // Y axis
+    { GGRAPH_LINE_DASH, 5, Gray, 50 },      // X grid
+    { GGRAPH_LINE_DOT, 7, Yellow, 50 },     // Y grid
+    GWIN_GRAPH_STYLE_POSITIVE_AXIS_ARROWS   // Flags
 };
 
+// Another graph styling 
 static const GGraphStyle GraphStyle2 = {
-	{ GGRAPH_POINT_SQUARE, 5, Red },		// point
-	{ GGRAPH_LINE_DOT, 2, Pink },			// line
-	{ GGRAPH_LINE_SOLID, 0, White },		// x axis
-	{ GGRAPH_LINE_SOLID, 0, White },		// y axis
-	{ GGRAPH_LINE_DASH, 5, Gray, 50 },		// x grid
-	{ GGRAPH_LINE_DOT, 7, Yellow, 50 },		// y grid
-	GWIN_GRAPH_STYLE_POSITIVE_AXIS_ARROWS	// flags
+    { GGRAPH_POINT_SQUARE, 5, Red },        // Point
+    { GGRAPH_LINE_DOT, 2, Pink },           // Line
+    { GGRAPH_LINE_SOLID, 0, White },        // X axis
+    { GGRAPH_LINE_SOLID, 0, White },        // Y axis
+    { GGRAPH_LINE_DASH, 5, Gray, 50 },      // X grid
+    { GGRAPH_LINE_DOT, 7, Yellow, 50 },     // Y grid
+    GWIN_GRAPH_STYLE_POSITIVE_AXIS_ARROWS   // Flags
 };
-
+ 
 int main(void) {
-	GHandle		gh;
-	uint16_t 	i;
-	
-	gfxInit();
-	
-	{
-		GWindowInit wi;
-
-		gwinClearInit(&wi);
-		wi.show = TRUE;
-		wi.x = wi.y = 0;
-		wi.width = gdispGetWidth();
-		wi.height = gdispGetHeight();
-		gh = gwinGraphCreate(&g, &wi);
-	}
-
-	gwinGraphSetOrigin(gh, gwinGetWidth(gh)/2, gwinGetHeight(gh)/2);
-	gwinGraphSetStyle(gh, &GraphStyle1);
-	gwinGraphDrawAxis(gh);
-	
-	for(i = 0; i < gwinGetWidth(gh); i++)
-		gwinGraphDrawPoint(gh, i-gwinGetWidth(gh)/2, 80*fsin(2*i/5));	//sin(2*0.2*GFX_PI*i/180));
+    GHandle     gh;
+    uint16_t    i;
+ 
+    gfxInit();
+ 
+    // Create the graph window
+    {
+        GWindowInit wi;
+ 
+        wi.show = TRUE;
+        wi.x = wi.y = 0;
+        wi.width = gdispGetWidth();
+        wi.height = gdispGetHeight();
+        gh = gwinGraphCreate(0, &wi);
+    }
+ 
+    // Set the graph origin and style
+    gwinGraphSetOrigin(gh, gwinGetWidth(gh)/2, gwinGetHeight(gh)/2);
+    gwinGraphSetStyle(gh, &GraphStyle1);
+    gwinGraphDrawAxis(gh);
+ 
+    // Draw a sine wave
+    for(i = 0; i < gwinGetWidth(gh); i++) {
+        gwinGraphDrawPoint(gh, i-gwinGetWidth(gh)/2, 80*sin(2*0.2*M_PI*i/180));
+    }
+ 
+    // Modify the style
+    gwinGraphStartSet(gh);
+    GraphStyle1.point.color = Green;
+    gwinGraphSetStyle(gh, &GraphStyle1);
+ 
+    // Draw a different sine wave
+    for(i = 0; i < gwinGetWidth(gh)*5; i++) {
+        gwinGraphDrawPoint(gh, i/5-gwinGetWidth(gh)/2, 95*sin(2*0.2*M_PI*i/180));
+    }
 
-	gwinGraphStartSet(gh);
-	GraphStyle1.point.color = Green;
-	gwinGraphSetStyle(gh, &GraphStyle1);
-	
-	for(i = 0; i < gwinGetWidth(gh)*5; i++)
-		gwinGraphDrawPoint(gh, i/5-gwinGetWidth(gh)/2, 95*fsin(2*i/5));	//sin(2*0.2*GFX_PI*i/180));
+    // Change to a completely different style
+    gwinGraphStartSet(gh);
+    gwinGraphSetStyle(gh, &GraphStyle2);
 
-	gwinGraphStartSet(gh);
-	gwinGraphSetStyle(gh, &GraphStyle2);
-
-	gwinGraphDrawPoints(gh, data, sizeof(data)/sizeof(data[0]));
-
-	while(TRUE) {
-		gfxSleepMilliseconds(100);
-	}
+    // Draw a set of points
+    gwinGraphDrawPoints(gh, data, sizeof(data)/sizeof(data[0]));
+ 
+    while(TRUE) {
+        gfxSleepMilliseconds(100);
+    }
 }
-
-