restructuring and disabling some buttons if the computer is not advanced

rhythmblock.lua

@@ -56,29 +56,21 @@ function playDisc()
 	term.clear()
 	if disk.isPresent(drive) and disk.hasAudio(drive) then -- Determines if there's a disc or not and if it's a music disc
         	disk.playAudio(drive)
-		renderStopButton()
+		buttonRender(true)
-		renderEjectButton()
-		renderCloseButton()
 		playing = true
 		status = disk.getAudioTitle(drive)
-	elseif disk.isPresent(drive) then -- If there's a floppy disk for example, Rhythmbox won't play it.
+		buttonRender(true)
         	status = invalidFormatStatus
-		renderPlayButton()
+		buttonRender(false)	
-		renderEjectButton()
-		renderCloseButton()
 	else -- If none of these checks are passed then it just means there's no disc in the drive.
         	status = noDiscStatus
-		renderPlayButton()
+		buttonRender(false)
-		renderEjectButton()
-		renderCloseButton()
 	end
 end
 
 function ejectDisc() -- Ejects the disc! How cool is that?
 	term.clear()
-	renderPlayButton()
+	buttonRender(false)
-	renderEjectButton()
-	renderCloseButton()
 	if playing == true then
 		stopDisc()
 		disk.eject()
@@ -94,9 +86,7 @@ function stopDisc() -- Stops the music
 	status = defaultStatus
 	disk.stopAudio(drive)
 	term.clear()
-	renderPlayButton()
+	buttonRender(false)
-        renderEjectButton()
-	renderCloseButton()
 end
 
 function renderPlayButton() -- Renders the Play button
@@ -119,6 +109,25 @@ function renderEjectButton() -- Renders the Eject button
 	term.write(ejectText)
 end
 
+function renderCloseButton() -- Renders the Close button
+        term.setCursorPos(width, 1)
+        term.setTextColor(textColor)
+        term.setBackgroundColor(backgroundColor)
+        term.write("x")
+end
+
+function buttonRender(play) -- Render some buttons depending if the computer is advanced or not
+        if play == true then
+                renderStopButton()
+        else
+                renderPlayButton()
+        end
+        if term.isColour() then
+                renderEjectButton()
+                renderCloseButton()
+        end
+end
+
 function statusRender(s) -- Renders the status bar 
 	term.setCursorPos(1, 1)
 	term.setTextColor(textColor)
@@ -126,13 +135,6 @@ function statusRender(s) -- Renders the status bar
 	term.write(s)
 end
 
-function renderCloseButton() -- Renders the X button
-	term.setCursorPos(width, 1)
-	term.setTextColor(textColor)
-        term.setBackgroundColor(backgroundColor)
-	term.write("x")
-end
-
 term.clear()
 term.setBackgroundColor(backgroundColor) -- Setting the background color
 renderPlayButton() -- Rendering the play button