Supertips: Specify width as 'em' units

doc/lua_api.md

@@ -2858,7 +2858,7 @@ Elements
 * `staticPos` is an optional position of the form `posX,posY` in formspec coordinates.
   If specified, the tooltip will always appear at these given formspec coordinates.
   If this field is empty, the tooltip will follow the cursor.
-* `width` sets the tooltip width (in formspec units).
+* `width` sets the tooltip width (in typographical 'em' units of the default font style).
 * `name` is the name of the field.
 * `text` is the formatted text using `Markup Language` described below.
 

games/devtest/mods/testformspec/formspec.lua

@@ -483,19 +483,19 @@ mouse control = true]
 
 			box[1,3;1,1;#ff000080]
 			box[2.4,3.4;0.2,0.2;#ffffff80]
-			supertip[1,3;1,1;2.5,3.5;5;supertip_static;<big>Simple supertip (<i>static</i>)</big>
+			supertip[1,3;1,1;2.5,3.5;18;supertip_static;<big>Simple supertip (<i>static</i>)</big>
 This one should always appear at the tiny white square.]
 
 			box[1,5;1,1;#ff000080]
-			supertip[1,5;1,1;;5;supertip_dynamic;<big>Simple supertip (<i>dynamic</i>)</big>
+			supertip[1,5;1,1;;18;supertip_dynamic;<big>Simple supertip (<i>dynamic</i>)</big>
 This should appear at the cursor.]
 
 			button[2.5,5;3,1;st_btn;HOVERME]
-			supertip[st_btn;;5;supertip_dynamic_btn;<big>Simple supertip (<i>dynamic</i>)</big>
+			supertip[st_btn;;18;supertip_dynamic_btn;<big>Simple supertip (<i>dynamic</i>)</big>
 This should appear at the cursor when hovering the button.]
 
 			box[1,7;1,1;#ff000080]
-			supertip[1,7;1,1;;5;supertip_dynamic_complex;]]..minetest.formspec_escape([[<big>Complex supertip (<i>dynamic</i>)</big>
+			supertip[1,7;1,1;;18;supertip_dynamic_complex;]]..minetest.formspec_escape([[<big>Complex supertip (<i>dynamic</i>)</big>
 <img name=testformspec_node.png float=right width=64 height=64>
 <left>Left align</left>
 <center>Right align</center>
@@ -505,33 +505,47 @@ Item:
 <item name=testformspec:node>]]).."]"..
 [[
 			box[1,9;1,1;#ff000080]
-			supertip[1,9;1,1;;5;supertip_stone;]]..minetest.formspec_escape([[<global color=#333 background=#aaa margin=20>
+			supertip[1,9;1,1;;18;supertip_stone;]]..minetest.formspec_escape([[<global color=#333 background=#aaa margin=20>
 <item name=testformspec:node float=left width=64 height=64>
 <big><b><center>Formspec Test Node</center></b></big>
 The <b>Formspec Test Node</b> is a dummy node to display an item in the <mono>testformspec</mono> mod.
 
 • <b>Max. stack size:</b> 99
 • <b>Drops:</b> <i>itself</i> <item name=testformspec:node width=32 height=32>]]).."]"..
 [[
+
+			box[3,9;1,1;#ff000080]
+			supertip[3,9;1,1;;5;supertip_bgimg;This supertip has a width of 5em!]
+
+			box[4.5,9;1,1;#ff000080]
+			supertip[4.5,9;1,1;;10;supertip_bgimg;This supertip has a width of 10em!]
+
+			box[6,9;1,1;#ff000080]
+			supertip[6,9;1,1;;20;supertip_bgimg;This supertip has a width of 20em!]
+
+			box[7.5,9;1,1;#ff000080]
+			supertip[7.5,9;1,1;;50;supertip_bgimg;This supertip has a width of 50em!]
+
+
 			box[1,11;1,1;#ff000080]
 			style[supertip_bgimg;bgimg=testformspec_tooltip_style_bg.png;bgimg_middle=8]
-			supertip[1,11;1,1;;5;supertip_bgimg;This supertip is styled (bgimg)!]
+			supertip[1,11;1,1;;8;supertip_bgimg;This supertip is styled (bgimg)!]
 
 			box[2.5,11;1,1;#ff000080]
 			style[supertip_bgcolor;bgcolor=#444488]
-			supertip[2.5,11;1,1;;5;supertip_bgcolor;This supertip is styled (bgcolor)!]
+			supertip[2.5,11;1,1;;8;supertip_bgcolor;This supertip is styled (bgcolor)!]
 
 			box[4,11;1,1;#ff000080]
 			style[supertip_bgimgcolor;bgimg=testformspec_tooltip_style_bg.png;bgimg_middle=8;bgcolor=#444488]
-			supertip[4,11;1,1;;5;supertip_bgimgcolor;This supertip is styled (bgimg + bgcolor)!]
+			supertip[4,11;1,1;;8;supertip_bgimgcolor;This supertip is styled (bgimg + bgcolor)!]
 
 			box[5.5,11;1,1;#ff000080]
 			style[supertip_noborder;border=false]
-			supertip[5.5,11;1,1;;5;supertip_noborder;This supertip is styled (no border)!]
+			supertip[5.5,11;1,1;;8;supertip_noborder;This supertip is styled (no border)!]
 
 			box[7,11;1,1;#ff000080]
 			style[supertip_combined;bgimg=testformspec_tooltip_style_bg.png;bgimg_middle=8;bgcolor=#00000000;border=false]
-			supertip[7,11;1,1;;5;supertip_combined;This supertip is styled (bgimage, transparent bgcolor, no border)!]
+			supertip[7,11;1,1;;8;supertip_combined;This supertip is styled (bgimage, transparent bgcolor, no border)!]
 ]]
 }
 

src/gui/guiFormSpecMenu.cpp

@@ -1806,7 +1806,10 @@ void GUIFormSpecMenu::parseSuperTip(parserData *data, const std::string &element
 		MY_CHECKPOS("supertip", 0);
 		MY_CHECKGEOM("supertip", 1);
 
-		s32 width = stof(parts[3]) * spacing.Y;
+		// Tooltip width is defined in em units of the default font
+		s32 em = g_fontengine->getFontSize(FM_Standard);
+		s32 width = stof(parts[3]) * em;
+
 		v2s32 pos;
 		v2s32 geom;
 		v2s32 stpos;
@@ -1854,7 +1857,10 @@ void GUIFormSpecMenu::parseSuperTip(parserData *data, const std::string &element
 		}
 	}
 
-	s32 width = stof(parts[2]) * spacing.Y;
+	// Tooltip width is defined in em units of the default font
+	s32 em = g_fontengine->getFontSize(FM_Standard);
+	s32 width = stof(parts[2]) * em;
+
 	v2s32 stpos;
 
 	if (!floating) {