OpenEuphoria

2. Re: Printing Graphics - .bmps

• Posted by ghaberek (admin) Jun 05, 2011
• 1225 views

Unfortunately you cannot do things in the way. Since you are manually painting graphics onto the control, there is no way to make it actually "stick" in the control to be printed later. It would also be a little difficult to get the image to stay inline with the text when the window is scrolled. Instead, you have to tell the control to insert the image within its own text buffer so it displays in-line.

Using Win32Lib, this would be accomplished using a series of RTF control codes and putStream(). However, I've never had good luck getting that to work correctly. I've gone so far as to create a rich text file in WordPad, then load the contents of the file into a Win32Lib RichEdit using putStream() and everything shows up - except the images!

I suggest using wxEuphoria and its custom wxRichTextCtrl instead. Currently wxEuphoria does not have support for wxRichTextPrinting, but I will get that implemented soon. It will make printing super-easy.

-Greg

include "wxeu/wxeud.e" 
without warning 
 
object void 
 
constant  
    wxID_INSERT = new_id(), 
     
    frmMain         = create( wxFrame, {0, -1, "RichText Demo", -1, -1, 640, 480} ), 
    mbrMain         = create( wxMenuBar, {frmMain} ), 
    mnuFile         = create( wxMenu, {mbrMain, "&File"} ), 
    mnuFile_Insert  = create( wxMenuItem, {mnuFile, wxID_INSERT, "&Insert Image..."} ), 
    rchEdit         = create( wxRichTextCtrl, {frmMain} ), 
    $ 
 
procedure menu_handler( atom this, atom event_type, atom id, atom event ) 
     
    if id = wxID_INSERT then         
         
        sequence filename = file_selector( frmMain, "Insert", { 
            "", -- path 
            "", -- file 
            "", -- extension 
            "All Image Files (*.bmp;*.gif;*.jpg;*.png)" & 
                "|*.bmp;*.gif;*.jpg;*.png" -- wildcard 
        }, wxOPEN+wxFILE_MUST_EXIST ) 
         
         
        if length( filename ) = 0 then 
            break 
        end if 
         
        atom size = get_size( filename ) 
         
        begin_suppress_undo( rchEdit ) 
         
        begin_bold( rchEdit ) 
        append_text( rchEdit, filename ) 
        end_bold( rchEdit ) 
         
        append_text( rchEdit, sprintf(" (%d KB)", floor(size / 1024)) ) 
        line_break( rchEdit ) 
         
        -- typical method, for adding images directly from files 
        write_image_from_file( rchEdit, filename, wxBITMAP_TYPE_ANY ) 
        line_break( rchEdit ) 
         
        end_suppress_undo( rchEdit ) 
         
         
        -- round-about method, useful for adding images from memory 
        --  atom bmp = create( wxBitmap, {BM_FROM_FILE, filename, wxBITMAP_TYPE_ANY} ) 
        --  atom img = convert_to_image( bmp ) 
        --  write_image( rchEdit, img, wxBITMAP_TYPE_PNG )       
         
         
    end if 
     
end procedure 
set_event_handler( frmMain, -1, wxEVT_COMMAND_MENU_SELECTED, routine_id("menu_handler") ) 
 
wxMain( frmMain ) 

4. Re: Printing Graphics - .bmps

• Posted by ghaberek (admin) Jun 05, 2011
• 1166 views

I think I better understand what you're trying to do now. Try creating a Pixmap and draw your text and barcode onto that. Then just copyBlt() the pixmap to your window during its w32HPaint event. Then when you need to do your printing, just copyBlt() the pixmap again to the Printer instead.

This method is commonly known as "double buffering"; albeit a simple example of it.

-Greg