F-Curve Modifiers: Basic GUI for Generator Modifier working

* Currently, this only works for the 'Expanded polynomial' mode, but this will be expanded to include the other modes too. Now you can modify the values and interactively see the graph in the view change. 

* Disabled the backdrops (modifier 'panels') temporarily, as ROUNDBOX UI elements currently swallow all events, which is not good.

Note: the code here still uses the old-style UI definition code since the new stuff is still under heavy construction. 

1 files changed, 78 insertions, 16 deletions

diff --git a/source/blender/editors/space_graph/graph_buttons.c b/source/blender/editors/space_graph/graph_buttons.c
index c53b6a720de..a860c25a563 100644
--- a/source/blender/editors/space_graph/graph_buttons.c
+++ b/source/blender/editors/space_graph/graph_buttons.c
@@ -223,51 +223,107 @@ static void graph_panel_drivers(const bContext *C, ARegion *ar, short cntrl, bAn
 
 static void do_graph_region_modifier_buttons(bContext *C, void *arg, int event)
 {
-	switch(event) {
+	switch (event) {
 		case B_REDR:
-		case B_FMODIFIER_REDRAW:
+		case B_FMODIFIER_REDRAW: // XXX this should send depsgraph updates too
 			ED_area_tag_redraw(CTX_wm_area(C));
 			return; /* no notifier! */
 	}
 }
 
 /* macro for use here to draw background box and set height */
-#define DRAW_BACKDROP(height, h) \
+// XXX for now, roundbox has it's callback func set to NULL to not intercept events
+#define DRAW_BACKDROP(height) \
 	{ \
-		height= h; \
 		if (active) uiBlockSetCol(block, TH_BUT_ACTION); \
-			uiDefBut(block, ROUNDBOX, B_REDR, "", 10-8, *yco-height, width, height-1, NULL, 5.0, 0.0, 12.0, (float)rb_col, ""); \
+			but= uiDefBut(block, ROUNDBOX, B_REDR, "", 10-8, *yco-height, width, height-1, NULL, 5.0, 0.0, 12.0, (float)rb_col, ""); \
+			uiButSetFunc(but, NULL, NULL, NULL); \
 		if (active) uiBlockSetCol(block, TH_AUTO); \
 	}
 
+/* callback to verify modifier data */
+static void validate_fmodifier_cb (bContext *C, void *fcu_v, void *fcm_v)
+{
+	FModifier *fcm= (FModifier *)fcm_v;
+	FModifierTypeInfo *fmi= fmodifier_get_typeinfo(fcm);
+	
+	/* call the verify callback on the modifier if applicable */
+	if (fmi && fmi->verify_data)
+		fmi->verify_data(fcm);
+}
+	
 /* draw settings for generator modifier */
 static void _draw_modifier__generator(uiBlock *block, FCurve *fcu, FModifier *fcm, int *yco, short *height, short width, short active, int rb_col)
 {
 	FMod_Generator *data= (FMod_Generator *)fcm->data;
+	char gen_mode[]="Generator Type%t|Expanded Polynomial%x0|Factorised Polynomial%x1|Built-In Function%x2|Expression%x3";
+	//char fn_type[]="Built-In Function%t|Sin%x0|Cos%x1|Tan%x2|Square Root%x3|Natural Log%x4";
+	int cy= *yco - 30;
+	uiBut *but;
 	
+	/* set the height */
+	(*height) = 70;
+	switch (data->mode) {
+		case FCM_GENERATOR_POLYNOMIAL: /* polynomial expression */
+			(*height) += 20*(data->poly_order+1) + 35;
+			break;
+		case FCM_GENERATOR_POLYNOMIAL_FACTORISED: /* factorised polynomial */
+			(*height) += 25 * data->poly_order;
+			break;
+		case FCM_GENERATOR_FUNCTION: /* builtin function */
+			(*height) += 50; // xxx
+			break;
+		case FCM_GENERATOR_EXPRESSION: /* py-expression */
+			// xxx nothing to draw 
+			break;
+	}
+	
+	/* basic settings (backdrop + mode selector + some padding) */
+	//DRAW_BACKDROP((*height)); // XXX buggy...
+	but= uiDefButS(block, MENU, /*B_FMODIFIER_REDRAW*/B_REDR, gen_mode, 10,cy,width-30,19, &data->mode, 0, 0, 0, 0, "Selects type of generator algorithm.");
+	uiButSetFunc(but, validate_fmodifier_cb, fcu, fcm);
+	cy -= 35;
+	
+	/* now add settings for individual modifiers */
 	switch (data->mode) {
 		case FCM_GENERATOR_POLYNOMIAL: /* polynomial expression */
 		{
-			/* we overwrite cvalue with the sum of the polynomial */
-			float value= 0.0f, *cp = NULL;
+			float *cp = NULL;
+			char xval[32];
 			unsigned int i;
 			
-			/* draw backdrop */
-			DRAW_BACKDROP((*height), 96);
+			/* draw polynomial order selector */
+				// XXX this needs validation!
+			but= uiDefButS(block, NUM, B_FMODIFIER_REDRAW, "Poly Order: ", 10,cy,width-30,19, &data->poly_order, 1, 100, 0, 0, "'Order' of the Polynomial - for a polynomial with n terms, 'order' is n-1");
+			uiButSetFunc(but, validate_fmodifier_cb, fcu, fcm);
+			cy -= 35;
 			
-			/* for each coefficient, add to value, which we'll write to *cvalue in one go */
+			/* draw controls for each coefficient and a + sign at end of row */
 			cp= data->coefficients;
 			for (i=0; (i < data->arraysize) && (cp); i++, cp++) {
-			
+				/* coefficient */
+				uiDefButF(block, NUM, B_FMODIFIER_REDRAW, "", 50, cy, 150, 20, cp, -FLT_MAX, FLT_MAX, 10, 3, "Coefficient for polynomial");
+				
+				/* 'x' param (and '+' if necessary) */
+				if (i == 0)
+					strcpy(xval, "");
+				else if (i == 1)
+					strcpy(xval, "x");
+				else
+					sprintf(xval, "x^%d", i);
+				uiDefBut(block, LABEL, 1, xval, 200, cy, 50, 20, NULL, 0.0, 0.0, 0, 0, "Power of x");
+				
+				if ( (i != (data->arraysize - 1)) || ((i==0) && data->arraysize==2) )
+					uiDefBut(block, LABEL, 1, "+", 300, cy, 30, 20, NULL, 0.0, 0.0, 0, 0, "Power of x");
+				
+				cy -= 20;
 			}
 		}
 			break;
 		
-#ifndef DISABLE_PYTHON
 		case FCM_GENERATOR_EXPRESSION: /* py-expression */
 			// TODO...
 			break;
-#endif /* DISABLE_PYTHON */
 	}
 }
 
@@ -286,10 +342,12 @@ static void graph_panel_modifier_draw(uiBlock *block, FCurve *fcu, FModifier *fc
 		uiBlockSetEmboss(block, UI_EMBOSSN);
 		
 		/* rounded header */
+#if 0 // XXX buggy...
 		if (active) uiBlockSetCol(block, TH_BUT_ACTION);
 			rb_col= (active)?-20:20;
-			uiDefBut(block, ROUNDBOX, B_REDR, "", 10-8, *yco-2, width, 24, NULL, 5.0, 0.0, 15.0, (float)(rb_col-20), ""); 
+			but= uiDefBut(block, ROUNDBOX, B_REDR, "", 10-8, *yco-2, width, 24, NULL, 5.0, 0.0, 15.0, (float)(rb_col-20), ""); 
 		if (active) uiBlockSetCol(block, TH_AUTO);
+#endif // XXX buggy
 		
 		/* expand */
 		uiDefIconButBitS(block, ICONTOG, FMODIFIER_FLAG_EXPANDED, B_REDR, ICON_TRIA_RIGHT,	10-7, *yco-1, 20, 20, &fcm->flag, 0.0, 0.0, 0, 0, "Modifier is expanded");
@@ -303,6 +361,7 @@ static void graph_panel_modifier_draw(uiBlock *block, FCurve *fcu, FModifier *fc
 		/* delete button */
 		but= uiDefIconBut(block, BUT, B_REDR, ICON_X, 10+(width-30), *yco, 19, 19, NULL, 0.0, 0.0, 0.0, 0.0, "Delete layer");
 		//uiButSetFunc(but, gp_ui_dellayer_cb, gpd, NULL);
+		
 		uiBlockSetEmboss(block, UI_EMBOSS);
 	}
 	
@@ -315,7 +374,8 @@ static void graph_panel_modifier_draw(uiBlock *block, FCurve *fcu, FModifier *fc
 				break;
 			
 			default: /* unknown type */
-				DRAW_BACKDROP(height, 96);
+				height= 96;
+				//DRAW_BACKDROP(height); // XXX buggy...
 				break;
 		}
 	}
@@ -330,11 +390,13 @@ static void graph_panel_modifiers(const bContext *C, ARegion *ar, short cntrl, b
 	FModifier *fcm;
 	uiBlock *block;
 	int yco= 190;
-
+	
 	block= uiBeginBlock(C, ar, "graph_panel_modifiers", UI_EMBOSS, UI_HELV);
 	if (uiNewPanel(C, ar, block, "Modifiers", "Graph", 340, 30, 318, 254)==0) return;
 	uiBlockSetHandleFunc(block, do_graph_region_modifier_buttons, NULL);
 	
+	uiNewPanelHeight(block, 204);
+	
 	/* 'add modifier' button at top of panel */
 	// XXX for now, this will be a operator button which calls a temporary 'add modifier' operator
 	uiDefButO(block, BUT, "GRAPHEDIT_OT_fmodifier_add", WM_OP_INVOKE_REGION_WIN, "Add Modifier", 10, 225, 150, 20, "Adds a new F-Curve Modifier for the active F-Curve");