Gui code neatened up for easy components.

Updated the gui init etc to use a layout struct to quickly setup new
rectangles for the gui. Each component can use its rect as its bounding
box for ui elements, each can set its own padding etc per panel

src/gui/gui.odin

@@ -7,6 +7,18 @@ import rl "vendor:raylib"
 WINDOW_WIDTH  :: 1920
 WINDOW_HEIGHT :: 1080
 
+// TODO: If this grows lets move it into its own file
+SIDEBAR_PERCENT     :: 0.20
+DISPLAY_PERCENT     :: 0.30
+CONTROLBAR_PERCENT  :: 0.05
+
+Layout :: struct {
+	left_panel  : rl.Rectangle,	
+	right_panel : rl.Rectangle,	
+	display		: rl.Rectangle,	
+	control_bar : rl.Rectangle,	
+}
+
 // Initialize main the gui 'window'
 init_gui :: proc(s: ^m.System) {
 	rl.SetConfigFlags({.WINDOW_RESIZABLE})
@@ -20,15 +32,9 @@ init_gui :: proc(s: ^m.System) {
 		// Pass these down to gui functions so they can setup their sizes?
 		screen_width  := f32(rl.GetScreenWidth())
 		screen_height := f32(rl.GetScreenHeight())
-
 		sidebar_width := screen_width * 0.20
 
-		display_rect := rl.Rectangle{
-		    x = sidebar_width,
-		    y = 0,
-		    width = screen_width - (sidebar_width * 2),
-		    height = screen_height * 0.30,
-		}
+		layout := calc_layout(screen_width, screen_height)
 
 		rl.BeginDrawing()
 		rl.ClearBackground(rl.BLACK)
@@ -42,12 +48,50 @@ init_gui :: proc(s: ^m.System) {
 		}
 		// --------------------------------------
 
-		// run each gui "component"
-		gui_screen(display_rect, s)
+		gui_left_panel(layout.left_panel, s)
+		gui_right_panel(layout.right_panel, s)
+		gui_screen(layout.display, s)
+		gui_control_bar(layout.control_bar, s)
 
 		rl.EndDrawing()
 	}
 
 	rl.CloseAudioDevice()
 	rl.CloseWindow()
-}
+}
+
+// TODO: If this grows lets move it into its own file
+calc_layout :: proc(screen_width: f32, screen_height: f32) -> Layout {
+	sidebar_width := screen_width * SIDEBAR_PERCENT 
+	display_height := screen_height * DISPLAY_PERCENT
+
+	return Layout {
+		left_panel = rl.Rectangle {
+		    x = 0,
+		    y = 0,
+		    width = sidebar_width,
+		    height = screen_height
+		},
+
+		right_panel = rl.Rectangle {
+		    x = screen_width - sidebar_width,
+		    y = 0,
+		    width = sidebar_width,
+		    height = screen_height
+		},
+
+		display = rl.Rectangle {
+		    x = sidebar_width,
+		    y = 0,
+		    width = screen_width - (sidebar_width * 2),
+		    height = display_height
+		},
+
+		control_bar = rl.Rectangle {
+		    x = sidebar_width,
+		    y = 0,
+		    width = screen_width - (sidebar_width * 2),
+		    height = (screen_height * 0.05) + display_height
+		}	
+	}
+}