Writing a GUI system

[untune]

Hey Fluid Byte

Thanks for that, it's really cool... removing the Z element is cool because then it's easier to keep track of the render order simply by the position in the list, cuts out unnecessary info making things more complicated

I'm going to start thinking about how to encapsulate all this in functions... hopefully this will eventually be able to just slot into any other game project with ease

Cheers

[untune]

Fluid Byte, sorry to bother you again

When you return the GUI_LASTID from the create window procedure, is this returning a pointer to the relevant window structure or to the element in the linked list?

Thanks

[Fluid Byte]

Fluid Byte, sorry to bother you again

I do this for fun so you're welcome!

When you return the GUI_LASTID from the create window procedure, is this returning a pointer to the relevant window structure or to the element in the linked list?

It's the address of the element in the linked list. But you could use CopyMemory() for example (like I do) and recieve the data of the structure to a variable of that type (e.g. poop.GUI_WINDOW). The only difference is the addtional data in memory of the element wich stores the address to the next and previous element.

This demo shows how an element is constructed (from the manual):

Code: Select all

  Structure Element
    *Next.Element        ; Pointer to next element in list or zero if at last element
    *Previous.Element    ; Pointer to previous element in list or zero if at first element

    ; The users data type which the list was created with will follow
    ; those two variables (which means the user data can be found at
    ; the address of the new element + 8
  EndStructure

[untune]

Fluid Byte

At long last after much messing and chopping and changing, I've managed to incorporate your codeinto my own functions and now I can select each panel properly...

A thousand thankyous..... "You are my master and i have your slave"

Hahaha, thanks mate

[Fluid Byte]

Hehehe

Enjoy!

[untune]

Hey all

Does anybody have any ideas on this - I'm just rewriting my input checking code and I want to be able to hold a mousebutton etc for the sake of dragging panels etc

So basically I've got a select statement that checks if a mousebutton is down, if it is, then it sets GUI_MOUSE_LBUTTON to #TRUE. If the button is up, it sets it to #FALSE.

Now obviously that's great for checking if it's being held but in a lot of cases I only want something to happen ONCE when a button is clicked, otherwise some things would loop for ages.

Does anybody know what I can do to make something happen once when a button is pressed?

Cheers

[untune]

Jumped the gun a bit with this one, fixed it

Of course, any ideas are still appreciated

[Kaeru Gaman]

something like buffering the previous value:

Code: Select all

GUI_MOUSE_LBUTTON_OLD = GUI_MOUSE_LBUTTON

GUI_MOUSE_LBUTTON = MouseButton(#PB_MouseButton_Left)


If GUI_MOUSE_LBUTTON = #True And GUI_MOUSE_LBUTTON_OLD = #False
  ; Click Action
EndIf

If GUI_MOUSE_LBUTTON = #True And GUI_MOUSE_LBUTTON_OLD = #True
  ; Drag Action
EndIf

If GUI_MOUSE_LBUTTON = #False And GUI_MOUSE_LBUTTON_OLD = #True
  ; Drop Action
EndIf

[untune]

Cheers for that Kaeru, that's more or less what I implemented and it seems to work fine

Feast your peepers on the image below, I've not really experimented with strings before so I'm hoping someone can point me in the right direction - take a look at the title bar for the orange panel. It stretches out of it's boundary, but what I want is to dynamically adjust it so that it fits, for example, so it would read "PANEL #6: G..." or something like that.



Obviously this requires some measuring of the string to get it's pixel size and I'm not too sure what the best way to go about it is. Any ideas?

Thanks

[Kaeru Gaman]

PB has implemented DDraw functions TextWidth and TextHeight.
a DDraw channel has to be open and the font in question has to be active.

[untune]

PB has implemented DDraw functions TextWidth and TextHeight.
a DDraw channel has to be open and the font in question has to be active.

Hehe, the only problem is that I'm using HGE to render and I'm not using PB's built in commands to do any drawing or input as of yet. This may change at some point but I'm keeping it all HGE for now, so I'm looking for theory behind it

Thanks for the suggestion though!

[Fluid Byte]

It's possible to retrieve the text width with HGE too:

http://hge.relishgames.com/doc/html/hge ... width.html

[untune]

It's possible to retrieve the text width with HGE too:

http://hge.relishgames.com/doc/html/hge ... width.html

Hehe I've not long since found that myself FB, cheers I might put this particular problem on hold for the time being and concentrate on getting buttons etc all working... I think the next step is to figure out how to drag those panels around

[Fluid Byte]

I will try to update my example to supoort window dragging ASAP!

Here's a little demo code showing how you could handle the string thingy:

Code: Select all

LoadFont(0,"System",10)
OpenWindow(0,0,0,320,240,"RESIZE ME!!",#WS_OVERLAPPEDWINDOW | 1)
SetWindowColor(0,#White)

Title$ = "Lorem ipsum dolor sit amet vater equat quad esperat."
tmpString$ = Title$
Length = Len(Title$)

Repeat
	EventID = WaitWindowEvent()

	StartDrawing(WindowOutput(0))
	DrawingFont(FontID(0))
	
	If TextWidth(Title$) > WindowWidth(0)
		For c=0 To Length-1
			Result$ = Left(Title$,Length - c)

			If TextWidth(Result$) < WindowWidth(0)
				tmpString$ = Left(Result$,Len(Result$) - 2) + "..." : Break
			EndIf
		Next
	Else
		tmpString$ = Title$
	EndIf
	
	Box(0,50,WindowWidth(0),25,#White)
	DrawText(0,55,tmpString$,0)
	Line(0,50,WindowWidth(0),0)
	Line(0,75,WindowWidth(0),0)
	StopDrawing()
Until EventID = #WM_CLOSE

It's using windows and it's ugly but is demonstrates the basic method and should be easily adaptable to use in HGE.

[untune]

Haha, you're always one step ahead FB, what would I do without you

Cheers for that, I'll have a look at it now