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B4A Library [Class] Special Drawables
- Thread starter derez
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I pass an array of more than 2 colors to my gradient all the time. In one case I pass 4 colors and it works fine.
The manual shows passing an array of just two colors for the gradient, but you can pass more. I use it in my button function I've posted here a couple times:
B4X:
Sub ButtonGradient(LightColor As Int, DarkColor As Int) As StateListDrawable
Dim ref As Reflector
' Define a GradientDrawable for Enabled state
Dim gdwEnabled As GradientDrawable
gdwEnabled.Initialize("TOP_BOTTOM", Array As Int(LightColor, Colors.White, DarkColor))
gdwEnabled.CornerRadius = 15
' Define a GradientDrawable for Pressed state
Dim gdwPressed As GradientDrawable
gdwPressed.Initialize("TOP_BOTTOM",Array As Int(DarkColor, DarkColor, Colors.White, LightColor))
ref.Target = gdwPressed
ref.RunMethod4("setCornerRadii", Array As Object(Array As Float(10,15,10,15,10,15,10,15)), Array As String("[F"))
' Define a GradientDrawable for Disabled state
Dim gdwDisabled As GradientDrawable
gdwDisabled.Initialize("TOP_BOTTOM", Array As Int(Colors.LightGray, Colors.DarkGray))
gdwDisabled.CornerRadius = 20
' Define a StateListDrawable
Dim stdGradient As StateListDrawable
stdGradient.Initialize
stdGradient.AddState2(Array As Int(stdGradient.State_enabled, -stdGradient.State_Pressed), gdwEnabled)
stdGradient.AddState(stdGradient.State_Pressed, gdwPressed)
stdGradient.AddState(stdGradient.State_Disabled, gdwDisabled)
Return stdGradient
End SubYes, from what I tested you can just give it however many colors you want and it uses them in order. There isn't a way of determining start/end positions though, so you have to double up colors (Like I did with my Dark Color above) and such to shift where the change starts.
And, your class isn't redundant...it can just be improved on now with new knowledge and less views needed, etc. I'd just modify it to use Shadow/Highlight colors like I did for my buttons (And how Windows Does it), so now they can pass it a color theme and the class handles all the 3D aspects.
And, your class isn't redundant...it can just be improved on now with new knowledge and less views needed, etc. I'd just modify it to use Shadow/Highlight colors like I did for my buttons (And how Windows Does it), so now they can pass it a color theme and the class handles all the 3D aspects.