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 Entire forum ➜ MUSHclient ➜ Lua ➜ Mapper module questions
Mapper module questions

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Posted by Magoo   (5 posts)  Bio
Date Tue 29 May 2012 09:18 AM (UTC)
Message
Hello, I was wondering if it would be possible to extend the mapper functionality in order to drag the mapper "view" around via movedrag hotspot(s)? Would it also be possible to add text labels to maps that can scale with the current zoom functions? I'm asking this in advance, as to avoid a headache with trying to implement things that aren't really possible.

Thanks
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Posted by Fiendish   USA  (2,551 posts)  Bio   Global Moderator
Date Reply #1 on Tue 29 May 2012 12:40 PM (UTC)

Amended on Tue 29 May 2012 12:46 PM (UTC) by Fiendish

Message
Yes and yes. And probably yes to anything else you ask about too. Miniwindows and hotspots give you pretty much complete access to the fundamental display and interaction layer of the client, so you can do anything that you can do, if you get my drift.
https://github.com/fiendish/aardwolfclientpackage
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Posted by Magoo   (5 posts)  Bio
Date Reply #2 on Wed 30 May 2012 09:49 AM (UTC)
Message
Any suggestions on how to go about measuring mouse movement in order to tell the difference between dragging up or down etc..? At the moment, i'm storing the initial mouse coordinates on mousedown and then determining the difference between the initial coordinates and any subsequent movement to update the coordinates of the 'view', but this isn't very reliable. Also, will hotspot creation keep up with repaint() or is it linked to redraw() somehow?
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Posted by Fiendish   USA  (2,551 posts)  Bio   Global Moderator
Date Reply #3 on Wed 30 May 2012 01:08 PM (UTC)

Amended on Wed 30 May 2012 01:21 PM (UTC) by Fiendish

Message
Quote:
Any suggestions on how to go about measuring mouse movement in order to tell the difference between dragging up or down etc..?
The moving around problem was solved for you a long time ago by the movewindow.lua file.

require "movewindow" at the top of your plugin and then see http://www.gammon.com.au/forum/bbshowpost.php?id=9594&page=2
The lines containing "movewindow" and "windowinfo" are the important ones.

Though if you want to get adventurous and start adding things like resizing, you can try something like...

Add a drag handler to a small hotspot in the lower-right corner like so:

-- Add handler for resizing
WindowAddHotspot(win, "resize", width-10, height-10, width, height, "MouseOver", "CancelMouseOver", "MouseDown", "", "MouseUp", "", 6, 0)
WindowDragHandler(win, "resize", "ResizeMoveCallback", "ResizeReleaseCallback", 0)


and then use callbacks like the following:


MIN_SIZE = 50

-- called when the resize drag widget is moved
function ResizeMoveCallback()
   posx, posy = WindowInfo (win, 17), WindowInfo (win, 18)
   width = width + posx - startx
   startx = posx
   if (width < MIN_SIZE) then
      width = MIN_SIZE
      startx = windowinfo.window_left+width
   elseif (windowinfo.window_left+width > GetInfo(281)) then
      width = GetInfo(281)-windowinfo.window_left
      startx = GetInfo(281)
   end 

   height = height + posy - starty
   starty = posy
   if (height < MIN_SIZE) then
      height = MIN_SIZE
      starty = windowinfo.window_top+height
   elseif (windowinfo.window_top+height > GetInfo(280)) then
      height = GetInfo(280)-windowinfo.window_top
      starty = GetInfo(280)
   end
   if (utils.timer() - lastRefresh > 0.0333) then
   --- RECONSTRUCT AND DRAW THE WINDOW WITH THE NEW HEIGHT AND WIDTH HERE
      lastRefresh = utils.timer()
   end
end

lastRefresh = 0

-- Called after the resize widget is released.
function ResizeReleaseCallback()
   --- RECONSTRUCT AND DRAW THE WINDOW WITH THE NEW HEIGHT AND WIDTH HERE
end

-- Called when mouse button is pressed on hotspot.
function MouseDown(flags, hotspot_id)
   if (hotspot_id == "resize") then
      startx, starty = WindowInfo (win, 17), WindowInfo (win, 18)
   end
end


Quote:
Also, will hotspot creation keep up with repaint() or is it linked to redraw() somehow

Repaint is just like Redraw but with greater conviction (NOW! instead of SOON). To my knowledge neither is required for hotspot creation.
https://github.com/fiendish/aardwolfclientpackage
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Posted by Magoo   (5 posts)  Bio
Date Reply #4 on Fri 01 Jun 2012 06:51 AM (UTC)
Message
Ah, well thanks for that, but I think I didn't make myself very clear about what I was trying to accomplish. Basically, I am not trying to move the entire miniwindow, but scroll around in it in order to see other parts of the map that aren't specifically in a 100 room radius of the current room. I have managed to, more or less, get it to do that - but I'm having a couple of issues here:

view_pos_x = 0;
view_pos_y = 0;
lastRefresh = 0;
function mouse_down ( flags, hotspot_id )
	view_pos_x = WindowInfo( win, 17 );
	view_pos_y = WindowInfo( win, 18 );
end


function drag_move ( flags, hotspot_id )
	local posx = WindowInfo( win, 17 );
	local posy = WindowInfo( win, 18 );
	if ( view_pos_x > posx ) then
		view_x = view_x - 0.5;
	end
	if ( view_pos_x < posx ) then
		view_x = view_x + 0.5;
	end
	if ( view_pos_y > posy ) then
		view_y = view_y - 0.5;
	end
	if ( view_pos_y < posy ) then
		view_y = view_y + 0.5;
	end
	if ( utils.timer() - lastRefresh > 0.0333  ) then
		draw( current_room );
		lastRefresh = utils.timer();
	end
	return 0;
end


The draw function is using Repaint(), as Redraw() is very bad for animations. The problem is that, without using a refresh setting of 0.03333, it fails to keep up with almost all hotspot creation - which is unfortunate as hotspots differ for each room in the view. Another problem I have is how to really go about using the mouse click coordinates to move the mapper around with simultaneous x-y dragging. I suppose I am missing something in my movement formula - because it does 'work' when I only allow the modification of a single axis at a time.
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Posted by Fiendish   USA  (2,551 posts)  Bio   Global Moderator
Date Reply #5 on Sat 02 Jun 2012 03:44 AM (UTC)
Message
Magoo said:

Basically, I am not trying to move the entire miniwindow, but scroll around in it
The math should be the same regardless. All you need to do is keep track of the mouse's motion delta between callbacks. What you do with that information will depend on purpose.

Quote:
The draw function is using Repaint(), as Redraw() is very bad for animations.
Ah, yes. That problem.
I use this:
http://code.google.com/p/aardwolfclientpackage/wiki/RepaintBuffer

Quote:
I suppose I am missing something in my movement formula
I gave you a movement formula that works. You just have to modify it.
https://github.com/fiendish/aardwolfclientpackage
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Posted by Nick Gammon   Australia  (23,166 posts)  Bio   Forum Administrator
Date Reply #6 on Sat 02 Jun 2012 09:20 AM (UTC)
Message
I suggest that Fiendish is the most expert person that I know of, for making the miniwindows work quickly.

I would follow his advice.

@Fiendish: thanks for your prompt support on this forum of such questions.
- Nick Gammon

www.gammon.com.au, www.mushclient.com
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Posted by Fiendish   USA  (2,551 posts)  Bio   Global Moderator
Date Reply #7 on Sat 02 Jun 2012 01:20 PM (UTC)

Amended on Sat 02 Jun 2012 01:21 PM (UTC) by Fiendish

Message
Magoo said:
I suppose I am missing something in my movement formula


To elaborate further, yes, you are. You don't actually use the posx,posy data in your dragmove callback. You look at it, and then you pick some arbitrary 0.5 value. And then you never update the mouse's "old" position between events. What you should be doing is looking at it, looking at the difference from where the mouse was last time, and then applying that value.

Where I have

posx, posy = WindowInfo (win, 17), WindowInfo (win, 18)
width = width + posx - startx
startx = posx


I believe you need

local posx = WindowInfo( win, 17 )
local posy = WindowInfo( win, 18 )
view_x = view_x + posx - view_pos_x
view_pos_x = posx
...
https://github.com/fiendish/aardwolfclientpackage
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Posted by Magoo   (5 posts)  Bio
Date Reply #8 on Mon 04 Jun 2012 11:50 AM (UTC)
Message
Thanks, I managed to fix a lot of things up with your help. Any idea which is faster for animating: using an image or using something like windowcircleop?
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Posted by Fiendish   USA  (2,551 posts)  Bio   Global Moderator
Date Reply #9 on Mon 04 Jun 2012 11:58 PM (UTC)
Message
Magoo said:

Thanks, I managed to fix a lot of things up with your help. Any idea which is faster for animating: using an image or using something like windowcircleop?

I think it kind of depends on what you're doing. I can tell you that gradient rects tend to be really slow, though.
https://github.com/fiendish/aardwolfclientpackage
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Posted by Magoo   (5 posts)  Bio
Date Reply #10 on Tue 05 Jun 2012 01:43 AM (UTC)

Amended on Tue 05 Jun 2012 04:02 AM (UTC) by Magoo

Message
Basically deciding between premade images for rooms in the mapper or drawing them using windowcircleop. The way the mapper does them now, if you see a fair number of rooms on the screen at any given time it is extremely slow.

I'd also like to stress the point that I am actually updating several room coordinates very quickly in order to 'scroll' the mapper view, but I am starting to realise that regardless of which method of drawing I use - miniwindows may simply be just too slow for any real-time animation on a large scale.
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Posted by Nick Gammon   Australia  (23,166 posts)  Bio   Forum Administrator
Date Reply #11 on Tue 05 Jun 2012 05:55 AM (UTC)
Message
What you might be able to do is pre-render them (within reason) into an off-screen window, and then just blit the portion you want onto the visible window.
- Nick Gammon

www.gammon.com.au, www.mushclient.com
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