If I drag a window.. timers stop?

BlitzMax Forums/BlitzMax Programming/If I drag a window.. timers stop?

Gabriel

(Posted 2006) [#1]

Title says it really. If I drag a GUI window around, while I'm dragging it, nothing happens. Now I can understand some events not being recognised, sure, but a timer? BlitzMax is fairly powerful, but I've yet to see any evidence it can stop time. Is there a solution/fix/workaround to this behaviour? An event I have to catch, perhaps?

skidracer

(Posted 2006) [#2]

You need to use an eventhook as Windows goes into a "modal loop" when the window is being dragged (it can do callbacks but can't allow your main loop to execute).

REDi	(Posted 2006) [#3]

Strict

Type TTestApp

	Field Window:TGadget = CreateWindow("",0,0,640,480)
	Field Canvas:TGadget = CreateCanvas(0,0,ClientWidth(window),ClientHeight(window),window,PANEL_BORDER)
	Field Timer :TTimer  = CreateTimer(10)
	Field Tick
	
	Method New()
		AddHook EmitEventHook,eventhook,Self
		Canvas.SetLayout(1,1,1,1)
	EndMethod	
	
	Function eventhook:Object(id,data:Object,context:Object)
		If TTestApp(context) Then TTestApp(context).OnEvent TEvent(data)
		Return data	
	EndFunction
	
	Method OnEvent(event:TEvent)
		Select event.id
		
			Case EVENT_WINDOWCLOSE
				Select Event.Source
					Case window
						End
				End Select
				
			Case EVENT_GADGETPAINT
				Select Event.Source
					Case Canvas
						SetGraphics(CanvasGraphics(canvas))
						SetViewport(0,0,ClientWidth(canvas),ClientHeight(canvas))
						Cls
						DrawText Tick,10,10
						Flip 0
				EndSelect
				
			Case EVENT_TIMERTICK
				Select Event.Source
					Case Timer
						Tick = Event.Data
						RedrawGadget(Canvas)
				EndSelect
			
		EndSelect
	EndMethod
	
EndType


Global App:TTestApp = New TTestApp

While True
	WaitEvent()
Wend

Gabriel

(Posted 2006) [#4]

Hi,

Thanks for the example, but that doesn't work for me. Once the window starts being dragged, the canvas stops being updated.

TeaVirus

(Posted 2006) [#5]

Gabriel,
There is an example of this in the MaxGUI tutorial in the "Tutorials and articles" section of the docs.

Gabriel

(Posted 2006) [#6]

So there is. That example won't compile as-is, unfortunately ( apparently SetTarget is not a valid method for windows any more ) and with those lines commented out, it kinda works. There is a very long pause after you click and drag before the eventhooking kicks in, and if you press any of the minimize or maximize buttons it breaks down altogether and stops again. But it's a bit better, I suppose.

EDIT: It doesn't work when integrated into my project though. It may work for simple stuff, but that seems to be all.