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Image Control Repeating Picture?

 
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gibberishh
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Joined: 30 Aug 2021
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PostPosted: Mon Sep 30, 2024 11:34 pm    Post subject: Image Control Repeating Picture? Reply with quote
Image controls on forms: they have a Stretch [picture] property but not a Repeat [picture] property? Or am I having trouble finding it? Is there a straightforward way to repeat a small image to the height and width of the image control (canvas) -- or any other control? As one does with, say, HTML backgrounds?

My end goal is to find the most efficient way to create a grid with 9x9px cells separated by 1x1px black lines. Users can click anywhere on the grid and I can determine which cell was clicked based on MouseDown x,y.

Going into this project I assumed that having a picture repeat by itself as a background would be more efficient than drawing hundreds of lines. My largest grid is 256x256, so that would require 514 lines including external borders -- or, even worse, 65536 squares.

Thanks!
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AylinCE
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PostPosted: Tue Oct 01, 2024 4:42 am    Post subject: Reply with quote
I will present you 2 different projects.
It is better to ask questions or find solutions with code examples.

This is my project:
Code:
if fdf1 then fdf1.Destroy() fdf1=nil end
DP1=getScreenDPI()/96
fdf1=createForm()
fdf1.height=286*DP1 fdf1.width=286*DP1
fdf1.PopupMode=0 fdf1.caption="fdf1"
fdf1.Position="poDesktopCenter" fdf1.ShowInTaskBar="stAlways"
fdf1.BorderStyle="bsSingle"
-------------------------
local imgTbl2 = {}
----------------------- imgTbl2.backImg1 ----- 
imgTbl2.backImg1=createImage(fdf1)
imgTbl2.backImg1.AutoSize=false
imgTbl2.backImg1.height=256*DP1 imgTbl2.backImg1.width=256*DP1 imgTbl2.backImg1.left=15*DP1 imgTbl2.backImg1.top=15*DP1
imgTbl2.backImg1.Font.Style="fsBold" imgTbl2.backImg1.Font.Size=0*DP1
imgTbl2.backImg1.Stretch=true
-----------------------

function createPictureFromURL(url)
 local http = getInternet()
 local file = http.getURL(url)
 http.destroy()
 local picture = createPicture()
 local stream = createStringStream(file)
 picture.loadFromStream(stream)
 return picture
end

pct2 = createPictureFromURL("https://i.hizliresim.com/8m6rsj6.jpg")
imgTbl2.backImg1.Picture = pct2

--imgTbl2.backImg1.Picture.loadFromStream(findTableFile('exmimg1.jpg').Stream)

function img_px(frm,owr,px,py,nt)
local nxt1 = 0
local lf1 = owr.Left
local tp1 = owr.Top
local hg1 = owr.Height / tonumber(px)
local wd1 = owr.Width / tonumber(py)

  for i=1, tonumber(nt) do
    imgTbl2["imgs"..i] = createImage(frm)
    imgTbl2["imgs"..i].Name = "imgs"..i
    imgTbl2["imgs"..i].Height = hg1 + 0.0
    imgTbl2["imgs"..i].Width = wd1
    imgTbl2["imgs"..i].Top = tp1
    imgTbl2["imgs"..i].Left = lf1
    imgTbl2["imgs"..i].Cursor = -21
    --clicked replace panels

    imgTbl2["pnls"..i] = createPanel(frm)
    imgTbl2["pnls"..i].Name = "pnls"..i
    imgTbl2["pnls"..i].Height = hg1 + 0.0
    imgTbl2["pnls"..i].Width = wd1
    imgTbl2["pnls"..i].Top = tp1
    imgTbl2["pnls"..i].Left = lf1
    imgTbl2["pnls"..i].Cursor = -21
    imgTbl2["pnls"..i].Caption = i
    imgTbl2["pnls"..i].Color = 0xffff00
    imgTbl2["pnls"..i].Visible = false

    lf1 = tonumber(lf1) + tonumber(wd1)
     nxt1 = tonumber(nxt1) + 1
     if nxt1==tonumber(px) then
      nxt1=0 lf1=owr.Left
      tp1 = tonumber(tp1) + tonumber(hg1)
     end
     imgTbl2["imgs"..i].OnClick=function(sender)
       local i1 = i
       local sender1 = imgTbl2["pnls"..i]
       print("Clicked object; "..sender.Name.." - Number of frames; "..i1)
       sender.Visible=false sender1.Visible=true
     end
     imgTbl2["pnls"..i].OnClick=function(sender)
       local i1 = i
       local sender1 = imgTbl2["imgs"..i]
       print("Clicked object; "..sender.Name.." - Number of frames; "..i1)
       sender.Visible=false sender1.Visible=true
     end
  end
end

frm = fdf1
owr = imgTbl2.backImg1
px = 10
py = 10
nt = tonumber(px) * tonumber(py)

img_px(frm,owr,px,py,nt)


---------------------------------------------------------------------
---------------------------------------------------------------------
If we assume that each movement of the coordinate pixels represents "+1",
we can divide it into 9 grids and calculate the results as follows:
Code:
if fdf1 then fdf1.Destroy() fdf1=nil end
DP1=getScreenDPI()/96
fdf1=createForm()
fdf1.height=286*DP1 fdf1.width=286*DP1
fdf1.PopupMode=0 fdf1.caption="fdf1"
fdf1.Position="poDesktopCenter" fdf1.ShowInTaskBar="stAlways"
fdf1.BorderStyle="bsSingle"
-------------------------
local imgTbl2 = {}
----------------------- imgTbl2.backImg1 ----- 
imgTbl2.backImg1=createImage(fdf1)
imgTbl2.backImg1.AutoSize=false
imgTbl2.backImg1.height=256*DP1 imgTbl2.backImg1.width=256*DP1 imgTbl2.backImg1.left=15*DP1 imgTbl2.backImg1.top=15*DP1
imgTbl2.backImg1.Font.Style="fsBold" imgTbl2.backImg1.Font.Size=0*DP1
imgTbl2.backImg1.Stretch=true
-----------------------

function createPictureFromURL(url)
 local http = getInternet()
 local file = http.getURL(url)
 http.destroy()
 local picture = createPicture()
 local stream = createStringStream(file)
 picture.loadFromStream(stream)
 return picture
end

pct2 = createPictureFromURL("https://i.hizliresim.com/8m6rsj6.jpg")
imgTbl2.backImg1.Picture = pct2

--imgTbl2.backImg1.Picture.loadFromStream(findTableFile('exmimg1.jpg').Stream)


imgTbl2.backImg1.OnMouseDown=function(sender, button, x, y)

p1 = math.floor(x * y)
x1 = math.floor(x / 9)
y1 = math.floor(y / 9)
frame_9 = tonumber(x1) * tonumber(y1)

print("Clicked pixel: "..p1)
print("Clicked grid left to right:: "..x1)
print("Clicked grid from top to bottom:: "..y1)
print("Clicked grid:: "..frame_9)

end


I hope it gave you ideas for your problem and solution.
Or if you wanted something different, we can continue with examples.
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gibberishh
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PostPosted: Wed Oct 02, 2024 8:12 pm    Post subject: Reply with quote
Thanks! I can use both your examples. This is very good. I came to the same conclusion as you did: that I will have to use a single large image for the full grid instead of having the image of one square repeat automatically.

Thanks again.
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