[orx-panel] Fix colorspace used for text input in ColorPicker

orx-jvm/orx-panel/src/demo/kotlin/DemoColorPickerButton01.kt

@@ -0,0 +1,33 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.panel.controlManager
+import org.openrndr.panel.elements.colorpickerButton
+
+/**
+ * A simple demonstration of a ColorPickerButton
+ */
+fun main() = application {
+    configure {
+        width = 720
+        height = 720
+    }
+    program {
+        var bgColor = ColorRGBa.PINK
+
+        val cm = controlManager {
+            layout {
+                colorpickerButton {
+                    label = "Pick color"
+                    color = bgColor
+                    events.valueChanged.listen {
+                        bgColor = it.color
+                    }
+                }
+            }
+        }
+        extend(cm)
+        extend {
+            drawer.clear(bgColor)
+        }
+    }
+}

orx-jvm/orx-panel/src/main/kotlin/org/openrndr/panel/elements/Colorpicker.kt

@@ -3,6 +3,7 @@ package org.openrndr.panel.elements
 import org.openrndr.*
 import org.openrndr.color.ColorHSVa
 import org.openrndr.color.ColorRGBa
+import org.openrndr.color.Linearity
 import org.openrndr.draw.ColorBuffer
 import org.openrndr.draw.Drawer
 import org.openrndr.draw.colorBuffer
@@ -121,7 +122,7 @@ class Colorpicker : Element {
                     val g = (number shr 8) and 0xff
                     val b = number and 0xff
                     val oldColor = color
-                    color = ColorRGBa(r / 255.0, g / 255.0, b / 255.0)
+                    color = ColorRGBa(r / 255.0, g / 255.0, b / 255.0, 1.0, Linearity.SRGB)
                     events.colorChanged.trigger(ColorChangedEvent(this, oldColor, realColor))
                     keyboardInput = ""
                     draw.dirty = true