func NewColorPicker(parent Widget, colors ...nanovgo.Color) *ColorPicker {
var color nanovgo.Color
switch len(colors) {
case 0:
color = nanovgo.RGBAf(1.0, 0.0, 0.0, 1.0)
case 1:
color = colors[0]
default:
panic("NewColorPicker can accept only one extra parameter (color)")
}
colorPicker := &ColorPicker{}
// init PopupButton member
colorPicker.chevronIcon = IconRightOpen
colorPicker.SetIconPosition(ButtonIconLeftCentered)
colorPicker.SetFlags(ToggleButtonType | PopupButtonType)
parentWindow := parent.FindWindow()
colorPicker.popup = NewPopup(parentWindow.Parent(), parentWindow)
colorPicker.popup.panel.SetLayout(NewGroupLayout())
colorPicker.colorWheel = NewColorWheel(colorPicker.popup.panel)
colorPicker.pickButton = NewButton(colorPicker.popup.panel, "Pick")
colorPicker.pickButton.SetFixedSize(100, 25)
InitWidget(colorPicker, parent)
colorPicker.SetColor(color)
colorPicker.PopupButton.SetChangeCallback(func(flag bool) {
colorPicker.SetColor(colorPicker.BackgroundColor())
if colorPicker.callback != nil {
colorPicker.callback(colorPicker.BackgroundColor())
}
})
colorPicker.colorWheel.SetCallback(func(color nanovgo.Color) {
colorPicker.pickButton.SetBackgroundColor(color)
colorPicker.pickButton.SetTextColor(color.ContrastingColor())
})
colorPicker.pickButton.SetCallback(func() {
color := colorPicker.colorWheel.Color()
colorPicker.SetPushed(false)
colorPicker.SetColor(color)
if colorPicker.callback != nil {
colorPicker.callback(colorPicker.BackgroundColor())
}
})
return colorPicker
}
func NewColorWheel(parent Widget, colors ...nanovgo.Color) *ColorWheel {
var color nanovgo.Color
switch len(colors) {
case 0:
color = nanovgo.RGBAf(1.0, 0.0, 0.0, 1.0)
case 1:
color = colors[0]
default:
panic("NewColorWheel can accept only one extra parameter (color)")
}
colorWheel := &ColorWheel{
dragRegion: RegionNone,
}
InitWidget(colorWheel, parent)
colorWheel.SetColor(color)
return colorWheel
}