|
BLACK, WHITE, RED, BLUE, YELLOW, GREY (or GRAY)
|
Specifies the initial background colour of the drawing surface. Otherwise this
defaults to the background colour of the surrounding window.
|
|
COLOUR=#rrggbb
COLOR=#rrggbb
|
Specifies the intial background colour of the drawing surface where rr
represents hexadecimal digits for the red component etc..
|
|
METAFILE_RESIZE USER_RESIZE
|
Options specifying the behaviour of the graphics area as it is re-sized. See
later in this chapter.
|
|
RGB_COLOURS
|
Selects rgb colour mode. This is the default for ClearWin+ releases
including and after FTN95 7.00.
|
|
VGA_COLOURS
|
Selects vga colour mode. This is the default for ClearWin+ releases
before FTN95 7.00.
|
|
FULL_MOUSE_INPUT
|
Specifies that mouse movements and mouse button releases should be notified to
the call-back function, not just clicks and double clicks.
|
|
POPUP
|
Used with FULL_MOUSE_INPUT in order to enable a %pm (Popup Menu) popup menu that is
otherwise disabled.
|
|
BOX_SELECTION
LINE_SELECTION
FREE_SELECTION
|
Specifies the initial selection mode, that controls the behaviour when the
user presses the left mouse button and drags the mouse over the graphics area.
These options are useful for interactive programs.
|
|
USER_SURFACE
|
An option to enable software to access the in-memory copy of the
graphics area so as to modify it at the highest possible speed. This option is
particularly useful for image processing software.
|
|
FLUSH
|
Used with %sy (Dialog Style) 3d-styles to re-align the %gr border.
|
|
SMOOTH4 |
Use high-resolution 8x4 box filter anti-aliasing |
|
SMOOTH8 |
Use 8x8 box filter box filter anti-aliasing |
|
HSCROLL, VSCROLL |
Adds scrolling options. Previously %vx and %hx could be used with %gr but
provided scroll bars as separate controls. The new options create scroll bars that are built into the control and as a
result have all of the expected "hot track" characteristics of a scroll bar.
%gr[hscroll] uses the same data as %hx whilst %gr[vscroll] uses the same data as %vx. This is accommodated by presenting
%hx with its data before %gr[hscroll] and %vx with its data before %gr[vscroll]. The only restriction is that the %hx
and %vx information must not include callback functions. For example:
integer iw,page,range,pos
integer,external::cb
iw = winio@("%vx&", page, range, pos)
iw = winio@("%^gr[vscroll]",400,300,cb)
The values used for 'page' and 'range' determine the y offset of the origin when drawing to the graphics region. Typically
the adjustment could be y = y-pos*range. In this way, %gr can be used to display a snapshot of a larger graph by redrawing
the area required. Alternatively a full sized graphics region could be created off-screen, with areas copied to the
%gr region as required.
|