edatl
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03-11-2013
07:49 AM
2D API Help and Drawing Text
screen_width = 1100
screen_height = 650
guide_height = 400
guide_width = 1000
cell_height = 50
cell_width = 200
cell_width_margin = 2
cell_height_margin = 2
epg_start_x = 200
epg_start_y = 200
epg_rows = 5
number_programs = 4
current_row = 1
screen = CreateObject("roScreen")
port = CreateObject("roMessagePort")
codes = bslUniversalControlEventCodes()
screen.SetMessagePort(port)
screen.SetAlphaEnable(true)
'screen.Clear(&h0000FFFF)
cell_bm = CreateObject("roBitmap", "pkg:/images/cell.png")
cell_bm.SetAlphaEnable(true)
start_x = epg_start_x
start_y = epg_start_y
fontRegistry = CreateObject("roFontRegistry")
font = fontRegistry.GetDefaultFont()
for i=0 to epg_rows step 1
for j=0 to number_programs step 1
'screen.DrawRect(start_x, start_y, cell_width, cell_height, yellow)
render_text(screen, font, "test episode", start_x, start_y)
screen.DrawObject(start_x, start_y, cell_bm)
start_x = start_x + cell_width + cell_width_margin
end for
start_y = start_y + cell_height + cell_height_margin
start_x = epg_start_x
end for
screen.Finish()
I am trying to generate an EPG grid with cells that contain text. The example above generates the epg grid but the text is underneath the green cell. How can I make the text appear over the drawn object? How could I remove the grid cells for an update to an EPG program data? On a related note, how could I clip the text to appear within the confines of the cell? I don't see anything native for the draw text to enable the use of ellipsis (...). Would this need to be written as extended functionality of the drawText. I've read the 2D API but would love to see some more examples using it.
Thanks for any insight or help.
1 REPLY 1

RokuMarkn
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03-11-2013
08:42 AM
Re: 2D API Help and Drawing Text
To make text appear on top of an object, draw the object first and then draw the text.
Generally an app using roScreen will redraw the entire screen on a update.
This post describes how to truncate text to a desired width.
--Mark
Generally an app using roScreen will redraw the entire screen on a update.
This post describes how to truncate text to a desired width.
--Mark