Add the ui.ColorPicker

pkg/uix/canvas.go

@@ -138,6 +138,11 @@ func NewCanvas(size int, editable bool) *Canvas {
 	return w
 }
 
+// Destroy the canvas.
+//
+// TODO: Not implemented, here to satisfy ui.Widget, should free up textures tho.
+func (w *Canvas) Destroy() {}
+
 // Load initializes the Canvas using an existing Palette and Grid.
 func (w *Canvas) Load(p *level.Palette, g *level.Chunker) {
 	w.Palette = p

pkg/windows/palette_editor.go

@@ -180,6 +180,14 @@ func NewPaletteEditor(config PaletteEditor) *ui.Window {
 				Height:     24,
 			})
 			btnColor.Handle(ui.Click, func(ed ui.EventData) error {
+				// Open a ColorPicker widget.
+				picker, err := ui.NewColorPicker(ui.ColorPicker{
+					Title:      "Select a color",
+					Supervisor: config.Supervisor,
+					Engine:     config.Engine,
+					Color:      swatch.Color,
+					OnManualInput: func(callback func(render.Color)) {
+						// Prompt the user to enter a hex color using the developer shell.
 						shmem.Prompt(fmt.Sprintf(
 							"New color in hex notation [%s]: ", swatch.Color.ToHex()), func(answer string) {
 							if answer != "" {
@@ -194,6 +202,17 @@ func NewPaletteEditor(config PaletteEditor) *ui.Window {
 									return
 								}
 
+								callback(color)
+							}
+						})
+					},
+				})
+				if err != nil {
+					log.Error("Couldn't open ColorPicker: %s", err)
+					return err
+				}
+
+				picker.Then(func(color render.Color) {
 					swatch.Color = color
 
 					// TODO: redundant from above, consolidate these
@@ -210,8 +229,11 @@ func NewPaletteEditor(config PaletteEditor) *ui.Window {
 					if config.OnChange != nil {
 						config.OnChange()
 					}
-					}
 				})
+
+				picker.Center(shmem.CurrentRenderEngine.WindowSize())
+				picker.Show()
+
 				return nil
 			})
 			config.Supervisor.Add(btnColor)

pkg/windows/settings.go

@@ -300,16 +300,38 @@ func (c Settings) makeOptionsTab(tabFrame *ui.TabFrame, Width, Height int) *ui.F
 			style.HoverBackground = style.Background.Lighten(20)
 			btn.SetStyle(&style)
 			btn.Handle(ui.Click, func(ed ui.EventData) error {
-				shmem.Prompt("Enter color in hexadecimal notation: ", func(answer string) {
-					if answer == "" {
-						return
+				// Open a ColorPicker widget.
+				picker, err := ui.NewColorPicker(ui.ColorPicker{
+					Title:      "Select a color",
+					Supervisor: c.Supervisor,
+					Engine:     c.Engine,
+					Color:      *row.Color,
+					OnManualInput: func(callback func(render.Color)) {
+						// Prompt the user to enter a hex color using the developer shell.
+						shmem.Prompt("New color in hex notation: ", func(answer string) {
+							if answer != "" {
+								// XXX: pure white renders as invisible, fudge it a bit.
+								if answer == "FFFFFF" {
+									answer = "FFFFFE"
 								}
 
 								color, err := render.HexColor(answer)
 								if err != nil {
-						shmem.FlashError("Invalid color value: %s", err)
+									shmem.Flash("Error with that color code: %s", err)
+									return
 								}
 
+								callback(color)
+							}
+						})
+					},
+				})
+				if err != nil {
+					log.Error("Couldn't open ColorPicker: %s", err)
+					return err
+				}
+
+				picker.Then(func(color render.Color) {
 					*row.Color = color
 					style.Background = color
 					style.HoverBackground = style.Background.Lighten(20)
@@ -317,6 +339,10 @@ func (c Settings) makeOptionsTab(tabFrame *ui.TabFrame, Width, Height int) *ui.F
 					// call onClick to save change to disk now
 					onClick(ed)
 				})
+
+				picker.Center(shmem.CurrentRenderEngine.WindowSize())
+				picker.Show()
+
 				return nil
 			})