(svn r3710) - Use the general function DrawArrowButtons() instead of doing it manually. The function has two parameters added, colour and an enabled flag.

gui.h

@@ -17,6 +17,7 @@ void ShowGameOptions(void);
 void ShowGameDifficulty(void);
 void ShowPatchesSelection(void);
 void ShowNewgrf(void);
+void DrawArrowButtons(int x, int y, int ctab, byte state, bool enabled);
 
 /* graph_gui.c */
 void ShowOperatingProfitGraph(void);

industry_gui.c

@@ -22,7 +22,6 @@ extern const byte _build_industry_types[4][12];
 extern const byte _industry_type_costs[37];
 
 static void UpdateIndustryProduction(Industry *i);
-extern void DrawArrowButtons(int x, int y, int state);
 
 static void BuildIndustryWndProc(Window *w, WindowEvent *e)
 {
@@ -311,7 +310,7 @@ static void IndustryViewWndProc(Window *w, WindowEvent *e)
 			DrawString(4 + (NEED_ALTERB ? 30 : 0), 127, STR_482B_TRANSPORTED, 0);
 			// Let's put out those buttons..
 			if (NEED_ALTERB)
-				DrawArrowButtons(5, 127, (WP(w,vp2_d).data_2 == 1 ? WP(w,vp2_d).data_3 : 0));
+				DrawArrowButtons(5, 127, 3, (WP(w,vp2_d).data_2 == 1) ? WP(w,vp2_d).data_3 : 0, true);
 
 			if (i->produced_cargo[1] != CT_INVALID) {
 				SetDParam(0, _cargoc.names_long[i->produced_cargo[1]]);
@@ -320,7 +319,7 @@ static void IndustryViewWndProc(Window *w, WindowEvent *e)
 				DrawString(4 + (NEED_ALTERB ? 30 : 0), 137, STR_482B_TRANSPORTED, 0);
 				// Let's put out those buttons..
 				if (NEED_ALTERB) {
-					DrawArrowButtons(5, 137, (WP(w,vp2_d).data_2 == 2 ? WP(w,vp2_d).data_3 : 0));
+					DrawArrowButtons(5, 137, 3, (WP(w,vp2_d).data_2 == 2) ? WP(w,vp2_d).data_3 : 0, true);
 				}
 			}
 		}

misc_gui.c

@@ -1791,10 +1791,8 @@ static void CheatsWndProc(Window *w, WindowEvent *e)
 			} else {
 				int32 val;
 
-				DrawFrameRect(x + 20, y + 1, x + 20 + 9, y + 9, 3, clk == i * 2 + 1 ? FR_LOWERED : 0);
-				DrawFrameRect(x + 30, y + 1, x + 30 + 9, y + 9, 3, clk == i * 2 + 2 ? FR_LOWERED : 0);
-				DrawStringCentered(x + 25, y + 1, STR_6819, 0);
-				DrawStringCentered(x + 35, y + 1, STR_681A, 0);
+				/* Draw [<][>] boxes for settings of an integer-type */
+				DrawArrowButtons(x + 20, y, 3, clk - (i * 2), true);
 
 				val = ReadCE(ce);
 

settings_gui.c

@@ -865,15 +865,8 @@ static void PatchesSelectionWndProc(Window *w, WindowEvent *e)
 					DrawFrameRect(x+5, y+1, x+15+9, y+9, (*(bool*)pe->variable) ? 7 : 9, (*(bool*)pe->variable) ? FR_LOWERED : 0);
 				SetDParam(0, *(bool*)pe->variable ? STR_CONFIG_PATCHES_ON : STR_CONFIG_PATCHES_OFF);
 			} else {
-				DrawFrameRect(x+5, y+1, x+5+9, y+9, 3, clk == i*2+1 ? FR_LOWERED : 0);
-				DrawFrameRect(x+15, y+1, x+15+9, y+9, 3, clk == i*2+2 ? FR_LOWERED : 0);
-				if (!editable) {
-					int color = PALETTE_MODIFIER_GREYOUT | _color_list[3].unk2;
-					GfxFillRect(x+6, y+2, x+6+8, y+9, color);
-					GfxFillRect(x+16, y+2, x+16+8, y+9, color);
-				}
-				DrawStringCentered(x+10, y+1, STR_6819, 0);
-				DrawStringCentered(x+20, y+1, STR_681A, 0);
+				/* Draw [<][>] boxes for settings of an integer-type */
+				DrawArrowButtons(x, y, 3, clk - (i * 2), editable);
 
 				val = ReadPE(pe);
 				if (pe->type == PE_CURRENCY) val /= _currency->rate;
@@ -1300,13 +1293,20 @@ void ShowNewgrf(void)
 	w->disabled_state = (1 << 5) | (1 << 6) | (1 << 7);
 }
 
-/* state: 0 = none clicked, 0x01 = first clicked, 0x02 = second clicked */
-void DrawArrowButtons(int x, int y, int state)
+/** Draw [<][>] boxes
+ * state: 0 = none clicked, 1 = first clicked, 2 = second clicked */
+void DrawArrowButtons(int x, int y, int ctab, byte state, bool enabled)
 {
-	DrawFrameRect(x, y+1, x+9, y+9, 3, (state & 0x01) ? FR_LOWERED : 0);
-	DrawFrameRect(x+10, y+1, x+19, y+9, 3, (state & 0x02) ? FR_LOWERED : 0);
-	DrawStringCentered(x+5, y+1, STR_6819, 0);
-	DrawStringCentered(x+15, y+1, STR_681A, 0);
+	DrawFrameRect(x,    y+1, x + 9, y+9, ctab, (state == 1) ? FR_LOWERED : 0);
+	DrawFrameRect(x+10, y+1, x +19, y+9, ctab, (state == 2) ? FR_LOWERED : 0);
+	DrawStringCentered(x+ 5, y+1, STR_6819, 0); // [<]
+	DrawStringCentered(x+15, y+1, STR_681A, 0); // [>]
+
+	if (!enabled) {
+		int color = PALETTE_MODIFIER_GREYOUT | _color_list[3].unk2;
+		GfxFillRect(x+ 1, y+1, x+ 1+8, y+8, color);
+		GfxFillRect(x+11, y+1, x+11+8, y+8, color);
+	}
 }
 
 static char _str_separator[2];
@@ -1320,7 +1320,7 @@ static void CustCurrencyWndProc(Window *w, WindowEvent *e)
 		DrawWindowWidgets(w);
 
 		// exchange rate
-		DrawArrowButtons(10, y, (clk >> (i*2)) & 0x03);
+		DrawArrowButtons(10, y, 3, (clk >> (i*2)) & 0x03, true);
 		SetDParam(0, 1);
 		SetDParam(1, 1);
 		DrawString(x, y + 1, STR_CURRENCY_EXCHANGE_RATE, 0);
@@ -1353,7 +1353,7 @@ static void CustCurrencyWndProc(Window *w, WindowEvent *e)
 		i++;
 
 		// switch to euro
-		DrawArrowButtons(10, y, (clk >> (i*2)) & 0x03);
+		DrawArrowButtons(10, y, 3, (clk >> (i*2)) & 0x03, true);
 		SetDParam(0, _custom_currency.to_euro);
 		DrawString(x, y + 1, (_custom_currency.to_euro != CF_NOEURO) ? STR_CURRENCY_SWITCH_TO_EURO : STR_CURRENCY_SWITCH_TO_EURO_NEVER, 0);
 		x = 35;