--- On Wed, 12/1/10, David Bovill <[email protected]> wrote:
> ? I'm just starting on doing this -
> but it seems to me that you need to
> scroll one of the groups. Maybe that's because I am
> creating it so the
> rounded corners can be at the to top or bottom. So clipping
> the square rect
> to half way, moving it down, and scrolling it down would
> show only the
> bottom half. - which means that effectively the graphic has
> the same rect
> but the group windows are different? This means that the
> gradients can be
> made identical.... wip...
>
You don't have to worry about scrolling with lockLocation set on the inner
groups. Here's a quick code recipe that you can put into a "Create" button:
##
constant kRectangle = "50,50,250,100"
constant kNoMargins = "0,0,0,0"
on mouseUp
--> load some essentials into local variables
local tRectangle, tHeight
put kRectangle into tRectangle
put (item 4 of tRectangle) - (item 2 of tRectangle) \
into tHeight
--> load the fillGradient array
local tFillGradientA
put "linear" into tFillGradientA["type"]
put (item 1 of tRectangle),(item 2 of tRectangle) \
into tFillGradientA["from"]
put (item 3 of tRectangle),(item 2 of tRectangle) \
into tFillGradientA["to"]
put (item 1 of tRectangle),(item 4 of tRectangle) \
into tFillGradientA["via"]
put "0.00000,192,192,192" & return & \
"1.00000,128,128,128" \
into tFillGradientA["ramp"]
--> prepare by resetting the templateControls
reset the templateGroup
reset the templateGraphic
--> start by creating the outer group
local tOuterGroup
set the rectangle of the templateGroup to tRectangle
set the margins of the templateGroup to kNoMargins
create group "MyCustomControl"
put it into tOuterGroup
--> create the roundrect inner group
local tRoundRectGroup
put (item 2 of tRectangle) + (tHeight div 2) \
into item 4 of tRectangle
set the rectangle of the templateGroup to tRectangle
set the lockLocation of the templateGroup to true
create group "RoundRectClipGroup" in tOuterGroup
put it into tRoundRectGroup
--> create the roundrect in the top inner group
put kRectangle into tRectangle
set the style of the templateGraphic to "RoundRect"
set the rectangle of the templateGraphic to tRectangle
set the opaque of the templateGraphic to true
set the antiAliased of the templateGraphic to true
set the fillGradient of the templateGraphic to tFillGradientA
create graphic "RoundRectGraphic" in tRoundRectGroup
--> create the rectangle inner group
local tRectangleGroup
put (item 4 of tRectangle) - (tHeight div 2) \
into item 2 of tRectangle
set the rectangle of the templateGroup to tRectangle
set the lockLocation of the templateGroup to true
create group "RectangleClipGroup" in tOuterGroup
put it into tRectangleGroup
--> create the rectangle in the bottom inner group
put kRectangle into tRectangle
set the style of the templateGraphic to "Rectangle"
set the rectangle of the templateGraphic to tRectangle
set the opaque of the templateGraphic to true
set the antiAliased of the templateGraphic to true
set the fillGradient of the templateGraphic to tFillGradientA
create graphic "RectangleGraphic" in tRectangleGroup
--> cleanup by resetting the templateControls
reset the templateGroup
reset the templateGraphic
end mouseUp
##
When you click the "Create" button, it creates all required controls
dynamically. Just for kicks, I automatically applied a fill gradient to this
example. Expand with graphic effects at your own leisure :-)
Write a behavior script that handles resizeControl and getProp/setProp handler
pairs for easier scripting (e.g. to switch top and bottom, or from horizontal
to vertical); then set the behavior of the outer group to the long id of that
behaviour button.
Groups and behaviors are a fantastic combination for creating custom controls
by composition. As Trevor has abundantly demonstrated with the DataGrid :-)
Enjoy!
Jan Schenkel.
=====
Quartam Reports & PDF Library for LiveCode
www.quartam.com
=====
"As we grow older, we grow both wiser and more foolish at the same time." (La
Rochefoucauld)
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