Thread: [wxlua-users] drawing

Hi,

I've been all over the net, but have found no decent documentation on
this matter, and I simply don't get it to work.

I'm only trying to draw a bitmap onto a frame, simple as that.

local bitmapFoo = wx.wxBitmap("foo.bmp", wx.wxBITMAP_TYPE_BMP, 300, 400)
local dc = wx.wxClientDC(instanceFoo)
dc:DrawBitmap(bitmapFoo, 0, 0, false)
dc:Delete()

What's wrong here...O_O...I don't get it

Hi,

Kenneth Forsbäck yazmış:
> Hi,
> 
> I've been all over the net, but have found no decent documentation on
> this matter, and I simply don't get it to work.
> 
> I'm only trying to draw a bitmap onto a frame, simple as that.
> 
> local bitmapFoo = wx.wxBitmap("foo.bmp", wx.wxBITMAP_TYPE_BMP, 300, 400)
> local dc = wx.wxClientDC(instanceFoo)
> dc:DrawBitmap(bitmapFoo, 0, 0, false)
> dc:Delete()
> 
> What's wrong here...O_O...I don't get it
> 


Did you investigate scribble.wx.lua sample?

ie.

function OnPaint(event)
     -- ALWAYS create wxPaintDC in wxEVT_PAINT handler, even if unused
     local dc = wx.wxPaintDC(panel)

     if bitmap and bitmap:Ok() then
         if redrawRequired then
             DrawBitmap(bitmap)
             redrawRequired = false
         end

         dc:DrawBitmap(bitmap, 0, 0, false)
     end

     dc:Delete() -- ALWAYS Delete() any wxDCs created when done
end


--
Regards,
Hakki Dogusan

Hi,

yes, I've looked through scribble.wx.lua, but since I didn't get it to
work, I just ignored it and tried something else.

here's the actual source I'm working with, and not just a generic example:

----------------------------------------
instanceAbout.lua
----------------------------------------

-- define instanceAbout
instanceAbout = wx.wxFrame(
	instanceSource,
	wx.wxID_ANY,
	"About Robin Studio",
	wx.wxDefaultPosition,
	wx.wxSize(300, 400),
	wx.wxCAPTION + wx.wxSTAY_ON_TOP + wx.wxFRAME_NO_TASKBAR
)

-- centre instanceAbout
instanceAbout:Centre(wx.wxBOTH)

-- define aboutBackground
local aboutBackground =
wx.wxBitmap("interface/about/aboutBackground.bmp", wx.wxBITMAP_TYPE_BMP,
300, 400)

-- define aboutPanel
local aboutPanel = wx.wxPanel(instanceAbout, wx.wxID_ANY,
wx.wxDefaultPosition, wx.wxSize(300, 400))

-- define OnPaint
function OnPaint(event)
	local dc = wx.wxPaintDC(aboutPanel)

	if aboutBackground and aboutBackground:Ok() then
		if redrawRequired then
			DrawBitmap(aboutBackground)
			redrawRequired = false
		end

		dc:DrawBitmap(aboutBackground, 0, 0, false)
	end

	dc:Delete()
end

----------------------------------------

Hakki Dogusan wrote:
> Hi,
> 
> Kenneth Forsbäck yazmış:
>> Hi,
>>
>> I've been all over the net, but have found no decent documentation on
>> this matter, and I simply don't get it to work.
>>
>> I'm only trying to draw a bitmap onto a frame, simple as that.
>>
>> local bitmapFoo = wx.wxBitmap("foo.bmp", wx.wxBITMAP_TYPE_BMP, 300, 400)
>> local dc = wx.wxClientDC(instanceFoo)
>> dc:DrawBitmap(bitmapFoo, 0, 0, false)
>> dc:Delete()
>>
>> What's wrong here...O_O...I don't get it
>>
> 
> 
> Did you investigate scribble.wx.lua sample?
> 
> ie.
> 
> function OnPaint(event)
>      -- ALWAYS create wxPaintDC in wxEVT_PAINT handler, even if unused
>      local dc = wx.wxPaintDC(panel)
> 
>      if bitmap and bitmap:Ok() then
>          if redrawRequired then
>              DrawBitmap(bitmap)
>              redrawRequired = false
>          end
> 
>          dc:DrawBitmap(bitmap, 0, 0, false)
>      end
> 
>      dc:Delete() -- ALWAYS Delete() any wxDCs created when done
> end
> 
> 
> --
> Regards,
> Hakki Dogusan
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by DB2 Express
> Download DB2 Express C - the FREE version of DB2 express and take
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> wxlua-users mailing list
> wxl...@li...
> https://lists.sourceforge.net/lists/listinfo/wxlua-users

Hi,

Kenneth Forsbäck yazmış:
> Hi,
> 
> yes, I've looked through scribble.wx.lua, but since I didn't get it to
> work, I just ignored it and tried something else.
> 
> here's the actual source I'm working with, and not just a generic example:
> 
> ----------------------------------------
> instanceAbout.lua
> ----------------------------------------
> 
[snipped]

May I ask a stupid question, did you connent event?

panel:Connect(wx.wxEVT_PAINT, OnPaint)
panel:Connect(wx.wxEVT_ERASE_BACKGROUND, function(event) end) -- do nothing


--
Regards,
Hakki Dogusan

Hi,

LOL, no I did not connect those events ^_^, and most certainly not a
stupid question.

However, it still doesn't work! Only thing that changed is that now the
panel isn't visible any more, there's only the dark gray background of
the frame.

~ Kenneth

Hakki Dogusan wrote:
> Hi,
> 
> Kenneth Forsbäck yazmış:
>> Hi,
>>
>> yes, I've looked through scribble.wx.lua, but since I didn't get it to
>> work, I just ignored it and tried something else.
>>
>> here's the actual source I'm working with, and not just a generic example:
>>
>> ----------------------------------------
>> instanceAbout.lua
>> ----------------------------------------
>>
> [snipped]
> 
> May I ask a stupid question, did you connent event?
> 
> panel:Connect(wx.wxEVT_PAINT, OnPaint)
> panel:Connect(wx.wxEVT_ERASE_BACKGROUND, function(event) end) -- do nothing
> 
> 
> --
> Regards,
> Hakki Dogusan
> 
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by DB2 Express
> Download DB2 Express C - the FREE version of DB2 express and take
> control of your XML. No limits. Just data. Click to get it now.
> http://sourceforge.net/powerbar/db2/
> _______________________________________________
> wxlua-users mailing list
> wxl...@li...
> https://lists.sourceforge.net/lists/listinfo/wxlua-users

Hi,

Kenneth Forsbäck yazmış:
> Hi,
> 
> LOL, no I did not connect those events ^_^, and most certainly not a
> stupid question.
> 
> However, it still doesn't work! Only thing that changed is that now the
> panel isn't visible any more, there's only the dark gray background of
> the frame.
> 
> ~ Kenneth
> 

Ok, it's painting now :)

To be sure, could you please change OnPaint like this:

function OnPaint(event)
   local dc = wx.wxPaintDC(aboutPanel)
   dc:SetBrush(wx.wxRED_BRUSH)
   dc:DrawRectangle(0, 0, 100, 100)
   dc:Delete() -- clean up
end

If this works, then your bitmap may be faulty..


--
Regards,
Hakki Dogusan

Hi,

yes it works now, I can see the red rectangle. How strange, I even tried
making a new image, even tried png instead of bmp, and it still doesn't
work O_O. I doubt there's anything wrong with the image...

~ Kenneth

Hakki Dogusan wrote:
> Hi,
> 
> Kenneth Forsbäck yazmış:
>> Hi,
>>
>> LOL, no I did not connect those events ^_^, and most certainly not a
>> stupid question.
>>
>> However, it still doesn't work! Only thing that changed is that now the
>> panel isn't visible any more, there's only the dark gray background of
>> the frame.
>>
>> ~ Kenneth
>>
> 
> Ok, it's painting now :)
> 
> To be sure, could you please change OnPaint like this:
> 
> function OnPaint(event)
>    local dc = wx.wxPaintDC(aboutPanel)
>    dc:SetBrush(wx.wxRED_BRUSH)
>    dc:DrawRectangle(0, 0, 100, 100)
>    dc:Delete() -- clean up
> end
> 
> If this works, then your bitmap may be faulty..
> 
> 
> --
> Regards,
> Hakki Dogusan
> 
> 
> 
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by DB2 Express
> Download DB2 Express C - the FREE version of DB2 express and take
> control of your XML. No limits. Just data. Click to get it now.
> http://sourceforge.net/powerbar/db2/
> _______________________________________________
> wxlua-users mailing list
> wxl...@li...
> https://lists.sourceforge.net/lists/listinfo/wxlua-users

Hi,

Kenneth Forsbäck yazmış:
> Hi,
> 
> yes it works now, I can see the red rectangle. How strange, I even tried
> making a new image, even tried png instead of bmp, and it still doesn't
> work O_O. I doubt there's anything wrong with the image...
> 
> ~ Kenneth
> 

Maybe it's not loading?

What is the result of aboutBackground:Ok() ?



--
Regards,
Hakki Dogusan

Hi,

indeed,

wx.wxMessageBox(tostring(aboutBackground:Ok()), "results", wx.wxOK +
wx.wxICON_INFORMATION, instanceAbout)

results in false. I tried using an absolute path, but that didn't work
either. There's also nothing wrong with the current directory in lua,
i.e. the root dir, so the image path is then:
"interface/about/aboutBackground.png"

~ Kenneth

Hakki Dogusan wrote:
> Hi,
> 
> Kenneth Forsbäck yazmış:
>> Hi,
>>
>> yes it works now, I can see the red rectangle. How strange, I even tried
>> making a new image, even tried png instead of bmp, and it still doesn't
>> work O_O. I doubt there's anything wrong with the image...
>>
>> ~ Kenneth
>>
> 
> Maybe it's not loading?
> 
> What is the result of aboutBackground:Ok() ?
> 
> 
> 
> --
> Regards,
> Hakki Dogusan

Kenneth Forsbäck wrote:
> Hi,
> 
> indeed,
> 
> wx.wxMessageBox(tostring(aboutBackground:Ok()), "results", wx.wxOK +
> wx.wxICON_INFORMATION, instanceAbout)
> 
> results in false. I tried using an absolute path, but that didn't work
> either. There's also nothing wrong with the current directory in lua,
> i.e. the root dir, so the image path is then:
> "interface/about/aboutBackground.png"
> 
> ~ Kenneth

You might want to try this:

local aboutBackground = 
wx.wxBitmapFromFile("interface/about/aboutBackground.bmp", 
wx.wxBITMAP_TYPE_BMP)

Hi,

woot, yes! thank you, now it works like a charm ^_^

~ Kenneth

Bradley Smith wrote:
> Kenneth Forsbäck wrote:
>> Hi,
>>
>> indeed,
>>
>> wx.wxMessageBox(tostring(aboutBackground:Ok()), "results", wx.wxOK +
>> wx.wxICON_INFORMATION, instanceAbout)
>>
>> results in false. I tried using an absolute path, but that didn't work
>> either. There's also nothing wrong with the current directory in lua,
>> i.e. the root dir, so the image path is then:
>> "interface/about/aboutBackground.png"
>>
>> ~ Kenneth
> 
> You might want to try this:
> 
> local aboutBackground = 
> wx.wxBitmapFromFile("interface/about/aboutBackground.bmp", 
> wx.wxBITMAP_TYPE_BMP)
> 
> 
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by DB2 Express
> Download DB2 Express C - the FREE version of DB2 express and take
> control of your XML. No limits. Just data. Click to get it now.
> http://sourceforge.net/powerbar/db2/
> _______________________________________________
> wxlua-users mailing list
> wxl...@li...
> https://lists.sourceforge.net/lists/listinfo/wxlua-users

Hi,

Kenneth Forsbäck yazmış:
> SGksCgppbmRlZWQsCgp3eC53eE1lc3NhZ2VCb3godG9zdHJpbmcoYWJvdXRCYWNrZ3JvdW5kOk9r
[snipped, image?]


In addition to checking aboutBackground:Ok(), using an absolute path for 
image could be useful..



--
Regards,
Hakki Dogusan

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Pgo+IEtlbm5ldGggRm9yc2LkY2sgeWF6bf3+Ogo+ID4gU0drc0NncHBibVJsWldRc0NncDNlQzUz
ZUUxbGMzTmhaMlZDYjNnb2RHOXpkSEpwYm1jb1lXSnZkWFJDWVdOclozSnZkVzVrT2s5cgo+IFtz
bmlwcGVkLCBpbWFnZT9dCj4KPgo+IEluIGFkZGl0aW9uIHRvIGNoZWNraW5nIGFib3V0QmFja2dy
b3VuZDpPaygpLCB1c2luZyBhbiBhYnNvbHV0ZSBwYXRoIGZvcgo+IGltYWdlIGNvdWxkIGJlIHVz
ZWZ1bC4uCgpUcnkgdXNpbmcgd3gud3hHZXRDd2QoKSB0byBzZWUgd2hhdCBkaXIgd3hXaWRnZXRz
IHdvdWxkIHVzZSBmb3IKbG9hZGluZyB0aGUgYml0bWFwLgoKUmVnYXJkcywKICAgIEpvaG4gTGFi
ZW5za2kK

the script is launched from "i:\src\studio\" and the CWD is the same, so
the image path "interface/about/aboutBackground.png" is corret.

I even tried with an absolute path
"i:\src\studio\interface\about\aboutBackground.png", and it still
doesn't work O_O

John Labenski wrote:
> 
> Try using wx.wxGetCwd() to see what dir wxWidgets would use for
> loading the bitmap.