New widget: ColorPicker, plus other changes
New properties are added to EventData for Supervisor events: * Widget: a reference to the widget which is receiving the event. * Clicked (bool): for MouseMove events records if the primary button is pressed. * func RelativePoint(): returns a version of EventData.Point adjusted to be relative to the Widget (0,0 at the Widget's absolute position on screen). Other changes: * Destroy() method for the Widget interface: widgets that need to free up resources on teardown should define this, the BaseWidget provides a no-op implementation. * Window.Resize() will properly resize a Window. * Window.Center(w, h int) to easily center a window on screen.
This commit is contained in:
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@ -154,6 +154,13 @@ most complex.
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* [x] **SelectBox**: a kind of MenuButton that lets the user choose a
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value from a list of possible values.
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Some useful helper widgets:
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* **ColorPicker**: a ui.Window popup that lets the user choose a color value.
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It shows a graphical gradient they can click on and an ability to enter a
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custom hexadecimal value by hand (needs assistance from your program).
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[Example](eg/colorpicker)
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**Work in progress widgets:**
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* [ ] **Scrollbar**: a Frame including a trough, scroll buttons and a
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585
colorpicker.go
Normal file
585
colorpicker.go
Normal file
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@ -0,0 +1,585 @@
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package ui
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import (
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"bytes"
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"encoding/base64"
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"errors"
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"fmt"
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"image"
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"image/png"
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"io/ioutil"
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"git.kirsle.net/go/render"
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)
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// ColorPicker is a Window that allows the user to pick out a color.
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type ColorPicker struct {
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*Window
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// Config settings.
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Title string
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Color render.Color // initial color selection
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Supervisor *Supervisor
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Engine render.Engine
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// Callback function in case the user wants to manually enter a hex color code.
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// Your program should prompt them by any means and return their chosen color.
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// Return a zero color (render.Invisible) to mean cancel.
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OnManualInput func(callback func(render.Color))
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then func(render.Color) // .Then() callback
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cancel func() // .OnCancel() callback
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selected render.Color
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// SDL2 etc. structures that will need freed.
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tex render.Texturer
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}
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// DefaultColorPickerSize sets the default window size used in NewColorPicker
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// unless the user specified overrides.
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var DefaultColorPickerSize = render.Rect{W: 240, H: 190}
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// NewColorPicker creates a new ColorPicker window. Specify the dimensions
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// you want the window to appear in (width, height int) to specify a desired
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// window size or else the default will be DefaultColorPickerSize.
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func NewColorPicker(config ColorPicker, dimensions ...int) (*ColorPicker, error) {
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var size = DefaultColorPickerSize
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if len(dimensions) == 2 {
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size = render.NewRect(dimensions[0], dimensions[1])
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}
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// Validate settings.
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if config.Title == "" {
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config.Title = "Select a color"
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}
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if config.Supervisor == nil {
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return nil, errors.New("a ui.Supervisor is required")
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}
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if config.Engine == nil {
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return nil, errors.New("a render.Engine is required")
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}
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// Create the colorpicker window.
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window := NewWindow(config.Title)
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window.Resize(size)
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window.SetButtons(CloseButton)
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w := &ColorPicker{
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Title: config.Title,
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Window: window,
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Supervisor: config.Supervisor,
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Engine: config.Engine,
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Color: config.Color,
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OnManualInput: config.OnManualInput,
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}
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window.Handle(CloseWindow, func(ed EventData) error {
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if w.cancel != nil {
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w.cancel()
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}
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return nil
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})
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if err := w.setup(); err != nil {
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return nil, err
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}
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w.Window.Supervise(w.Supervisor)
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w.Window.Hide()
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return w, nil
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}
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// Then is a callback function when the user has chosen a color.
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func (w *ColorPicker) Then(callback func(render.Color)) {
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w.then = callback
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}
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// OnCancel is a callback to handle the ColorPicker being dismissed by the user.
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func (w *ColorPicker) OnCancel(callback func()) {
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w.cancel = callback
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}
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// setup the main UI of the ColorPicker window.
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func (w *ColorPicker) setup() error {
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// Load the color gradient image. Guaranteed not to error.
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if tex, err := w.Engine.StoreTexture("ui.ColorPicker/spectrum.png", MakeColorPickerGradient()); err != nil {
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return err
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} else {
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w.tex = tex
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}
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// Prepare values for the currently selected color.
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var (
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OriginalColor = w.Color
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CurrentColor = w.Color
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)
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if OriginalColor.IsZero() {
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OriginalColor = render.Black
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}
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CurrentColor = OriginalColor
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w.selected = CurrentColor
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// Divide up the main frames.
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var (
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btnFrame = NewFrame("Buttons")
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frame = NewFrame("Main Frame")
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leftFrame = NewFrame("Content Frame")
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)
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// DEBUG
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// btnFrame.SetBackground(render.Yellow)
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// frame.SetBackground(render.Red)
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// leftFrame.SetBackground(render.Green)
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// The main frame vs. the button frame on bottom.
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w.Pack(frame, Pack{
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Side: N,
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Fill: true,
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Expand: true,
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})
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w.Pack(btnFrame, Pack{
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Side: N,
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PadY: 4,
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})
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// The left and right frames of the main frame.
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frame.Pack(leftFrame, Pack{
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Side: N,
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Fill: true,
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Expand: true,
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})
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////////
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// Buttons frame.
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{
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for _, config := range []struct {
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label string
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callback func()
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}{
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{"Ok", func() {
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w.Destroy()
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if w.then != nil {
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w.then(w.selected)
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}
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}},
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{"Cancel", func() {
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if w.cancel != nil {
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w.cancel()
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}
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w.Destroy()
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}},
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} {
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config := config
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btn := NewButton(config.label, NewLabel(Label{
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Text: config.label,
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Font: DefaultFont.Update(render.Text{
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PadX: 8,
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PadY: 2,
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}),
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}))
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btn.Handle(Click, func(ed EventData) error {
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config.callback()
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return nil
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})
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w.Supervisor.Add(btn)
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btnFrame.Pack(btn, Pack{
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Side: W,
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PadX: 2,
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})
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}
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}
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/////////
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// Left frame.
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{
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// The gradient image up top.
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gradient, _ := ImageFromImage(MakeColorPickerGradient())
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leftFrame.Pack(gradient, Pack{
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Side: N,
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PadX: 2,
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PadY: 4,
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})
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// Below that: your Current Color | Original Color indicators.
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var (
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previewRow = NewFrame("Color Preview")
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curColorFrame = NewFrame("Current Color")
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origColorFrame = NewFrame("Original Color")
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previewDividerFrame = NewFrame("Divider")
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hexLabel = NewLabel(Label{
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Text: " Hex color:",
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Font: DefaultFont,
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})
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hexButton = NewButton("Hex Button", NewLabel(Label{
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Text: w.selected.ToHex(),
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Font: DefaultFont.Update(render.Text{
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PadX: 6,
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}),
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}))
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)
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curColorFrame.Configure(Config{
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Width: 24,
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Height: 24,
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Background: CurrentColor,
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BorderStyle: BorderSunken,
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BorderSize: 2,
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BorderColor: CurrentColor,
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})
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origColorFrame.Configure(Config{
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Width: 24,
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Height: 24,
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Background: OriginalColor,
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BorderColor: OriginalColor,
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BorderSize: 2,
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BorderStyle: BorderSunken,
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})
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previewDividerFrame.Configure(Config{
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Width: 1,
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Height: 24,
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BorderStyle: BorderRaised,
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BorderSize: 2,
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BorderColor: render.Grey,
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})
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previewRow.Pack(curColorFrame, Pack{
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Side: W,
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PadX: 4,
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})
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previewRow.Pack(previewDividerFrame, Pack{
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Side: W,
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})
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previewRow.Pack(origColorFrame, Pack{
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Side: W,
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PadX: 4,
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})
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previewRow.Pack(hexLabel, Pack{
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Side: W,
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})
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previewRow.Pack(hexButton, Pack{
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Side: W,
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PadX: 4,
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})
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leftFrame.Pack(previewRow, Pack{
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Side: N,
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FillX: true,
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PadX: 5,
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})
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// Bind clicks into the spectrum image to update the selected color.
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gradient.Handle(MouseMove, func(ed EventData) error {
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if ed.Clicked {
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point := ed.RelativePoint()
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color := render.FromColor(gradient.Image.At(point.X, point.Y))
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w.selected = color
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hexButton.SetText(color.ToHex())
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curColorFrame.Configure(Config{
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Background: color,
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BorderColor: color,
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})
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}
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return nil
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})
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// Clicking the original color resets it.
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origColorFrame.Handle(Click, func(ed EventData) error {
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color := OriginalColor
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w.selected = color
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hexButton.SetText(color.ToHex())
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curColorFrame.Configure(Config{
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Background: color,
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BorderColor: color,
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})
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return nil
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})
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// Clicking the Hex Button prompts the user to enter a hex code themselves.
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hexButton.Handle(Click, func(ed EventData) error {
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if w.OnManualInput != nil {
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w.OnManualInput(func(color render.Color) {
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if color.IsZero() {
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return
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}
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w.selected = color
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hexButton.SetText(color.ToHex())
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curColorFrame.Configure(Config{
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Background: color,
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BorderColor: color,
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})
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})
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}
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return nil
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})
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w.Supervisor.Add(gradient)
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w.Supervisor.Add(origColorFrame)
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w.Supervisor.Add(hexButton)
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}
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return nil
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}
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// Compute the widget.
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func (w *ColorPicker) Compute(e render.Engine) {
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// TODO: free the w.tex
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}
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// Destroy the ColorPicker widget. Call this instead of Hide() if you close the
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// widget programmatically! It will free up SDL textures and so on.
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func (w *ColorPicker) Destroy() {
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w.Hide()
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}
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// ColorPickerPreset shows the preset color buttons.
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// Suggested to have 18 colors which is displayed in 2 rows of 9 buttons.
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// More presets may need larger than default window size to fit.
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var ColorPickerPreset = []string{
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// Row 1
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"#FFFFFF", // White
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"#CCCCCC", // Light grey
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"#FF0000", // Red
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"#FF9900", // Orange
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"#FFFF00", // Yellow
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"#00FF00", // Lime green
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"#00FFFF", // Cyan
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"#FF00FF", // Magenta
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"#FF9999", // Pastel red
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"#99FF99", // Pastel green
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// Row 2
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"#000000", // Black
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"#999999", // Dark grey
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"#990000", // Dark red
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"#996600", // Brown
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"#999900", // Gold
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"#009900", // Green
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"#009999", // Teal
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"#000099", // Dark Blue
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"#990099", // Purple
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"#9999FF", // Pastel blue
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"#FFFF99", // Pastel yellow
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}
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// Load the color spectrum image.
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func MakeColorPickerGradient() image.Image {
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data, err := base64.StdEncoding.DecodeString(colorPickerGradient)
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if err != nil {
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fmt.Printf("ui.MakeColorPickerGradient: %s", err)
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return nil
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}
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// debug
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ioutil.WriteFile("gradient.png", data, 0644)
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image, err := png.Decode(bytes.NewBuffer(data))
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if err != nil {
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fmt.Printf("ui.MakeColorPickerGradient: png.Decode: %s", err)
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return nil
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}
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return image
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}
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// colorPickerGradient holds Base64 PNG image data for the color picker graphic.
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const colorPickerGradient = `iVBORw0KGgoAAAANSUhEUgAAAMgAAABkCAIAAABM5OhcAAAABGdBTUEAAK/INwWK6QAAABl0RVh0
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U29mdHdhcmUAQWRvYmUgSW1hZ2VSZWFkeXHJZTwAACvxSURBVHjaYvz//z/DKBgF1AYAAcQ0GgSj
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gBYAIIBGE9YooAkACKDRhDUKaAIAAmg0YY0CmgCAAHRXSRKAIAxrHP//YC6RpS2pqAeQpGt6gdta
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s35/B8YJAa8b/QCDmqjvBa9gfshNHwegu0DSuDUd5zQrXpl+4QiDajTAWK/8X5QFm6HEfsdApTIF
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onjtOWNRCnXlzvaE+rRRpXkI2Ske8o+52Y/8kCop07A4Ygux16IoS1c450ap7O34CMBGGSQBCMIw
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MHX8/3e5EUcpbcJ4pAIm7YYbY3wvV+SBUG7YAq34LQO+Ad2YAiPgklsjbS7vARVb3KwxT7mOTd4v
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Xpf/u5C6vFX5SSDrOjsSWjktxY4CVAcFHXF1OC//nMbEWip52vuABbGxg0xAIl/PBWm2CQkKHSOd
|
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QPpWxUyM8tINgM3zLT4CEFJFKwCEIKz1/9+cx0W15YTABzUDN6dbWGxNHMoo2aQaVT18TZpwfg4P
|
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|
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|
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|
||||
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|
||||
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|
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|
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|
||||
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||||
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||||
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|
||||
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|
||||
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|
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|
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|
||||
BmEY6cT//y+s9dQ8HCPtUlFBD8ax4yYcq9TxQbpUlpElBdPXE+N2LlIOKK8SYd/1AwNJXS1vo89+
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|
||||
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|
||||
E4Auc8kBEISBKGjw/tel0SqCHfoR08SNJAyFNy0KsXa9//seAqJaHKpia17B9w+uUDSHyyU8HGos
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+ZZsmSMKJgujsG1pePf717LtiXw/kBxVHadI/7XBC9kxHloYz0+ux/MKQNgZoAAUgjCU3/f+F440
|
||||
CMPZjE5Qq7TnhFoZyy4xckyKOQRhBuNCEhkz/XcoAzDaGUvK6LiQbvkzKs7sS1vg1x++EmUE+L97
|
||||
cS5GwpjA9tNBtyU5Mpzom7R0jbedJ2tbCbNhLiy9k6h52QVqkBYHy6JbV2AjZuAOFvColISAKQCd
|
||||
ZoADMAjCwLns/w+eOpalAwroB4wE5WqrolD2KAQ9Wpy2iYBCmnA4MTBq8b6etPfl6BrlatTztDhV
|
||||
+RuVFXBSfj5Vp1slnRJeKcR4IjS4HtCj/YYnVPyt1kNOGEhp1Ux0z8EjxlLRO7FbAtvtU0umq8S1
|
||||
sZnyDsFrUQnW4f503S53w53fhHZx/5f7c7wCkG0GSQCDIAysVf//XwdLpwIh2nsPOEYJG+vC4szT
|
||||
1T6JUZkzlIQ7zIncEHayYn1931arqQ7gnuOQR0VgV4PofIovYLXA72o2EIXf5bvqgFimMJ1xS8Vd
|
||||
VfY/0NyzAwS3vWnUSHtIWEZ/JGjbILLlja/8DkqsBxmi0pL2xze6DUXXncOIYVzIK7k8hYxFSVLz
|
||||
lJS/QVnCsiJYIkKByCCRYUjhzQFbRJb7lfAKwNa17DAMgzDo4/+/dpdmKd1qTNxl50pVUCAG21G2
|
||||
1zynI9UXys916fvnhVGuvdh5jFxfoqdlYiGr4A3pzIzaizddAmWnaZQM5p7kfGrSMd+1KFpxhFEE
|
||||
KcLogoNSTEMTjZy3AIJ+1wd2xFdaTnAI34vAiVVybRcRulGEPkKwn18HrcixdgxVYSLmWI6ptgic
|
||||
E0gyBpd8spTcXUAwqj52MqhrQqHT53nSiQE2C7aZQ9qWZuRIK7ciu98/BPbnj5cAhJpLDsAgCEQx
|
||||
8f4HLgEb5TfaNl22OzLK4PBieLciNLiK1KJ5jjv/8zm9lHArxx381mrj1aGPqFWSzSIAAuJs1XN2
|
||||
dw/5zxTR0RvI0WKYoI84uO9zSKbzsbSan+QdS6kMEQcZq0F2UdL4FTZsOk6EA0o54FwNC8/jJQmh
|
||||
VaawFK3GS8lj2ZXnUsYl7cXfJaYkcZcZMgjrTxfBrpAKpFEAgNxIbgHoNoMkgEEQBgr9/49F24NI
|
||||
UuDi0RkEnLBRxg0D0qGseju1DllAdRtsQgm1IiCcXGSzEmF5Qt/Np4SKLApMhdJ/bNgHUkR5GUNH
|
||||
XEHvruRMlELyPms0+XcJOWwRkqT5VvwAxXtlJLsE7ufj8zzJYVCOxFnkSmEYJ4H6A+xcSs61or8d
|
||||
XwHYNpckAEEYhlrh/ifm44yQ9Ltx4U4aaBqemAp3tdT8AnH4iXSt101Bh/Y+mhBpeP5bdItDFWxA
|
||||
Fo+x6uWq5lptehJ+qdhVUZ5kQiiQBmG9JgtOemI5TtuaabsEbU1erD2qquEP8FUxPrhYB6pxuzUL
|
||||
EjDikMs3qOqQQB1AE31VmihdBEDPYhVmwDkis8UMQpv1CcCnleQAEMKgcfz/j3E5qdCKiUcvpAUj
|
||||
QIoV3hCXV1VlOINAGkQ59M62a+ZI1x4A9I6L19RWLIYcTq7aUtrtL/yvleLF6tzs+c73xB3cALNo
|
||||
mep+GEu2QKuCCbSAIuGAlxZrhJhj1eHgGfNwgcYUgK0zygEQBmGosPsf2WHm2lHI/N3PmoiD9qnI
|
||||
CpNfYmnEvGxfob847u+OOpxWHWdJtGsOPzNZ0JA5Me5HyrTC9JZUR/j3y2sPVn90tsQ4CNIklYfw
|
||||
yoPEQD0ljA/e3ZDs+oCwJ5vuvNMtB73G8PfSiaJkSv+OVCf0q3VGR+poFY9kLbkAvy5Ao3dJwEf/
|
||||
5CcGEUnOxrqnQh8Q128Y/yurGovg+gQg3Ax2AAZBGJrU///kgachpXU7mnjwRSmm1eZjjVIH65Za
|
||||
uescLIoVJNVNF6OmCzZCukS4oW3dcsGC096ajjYBnyQjouYiT8egGLVr9AT+xx3tX1vAotXB18sz
|
||||
SCwDpk1cwWJcYB4p/BGkd+E9S9sCMHbuOACAIAwV7n9lwVE+Lbob4ktpOtjE3G6QVw52go+7O2qr
|
||||
GUe5pVfBT2pGhShJUvzhyDoRYDeGsk9ICyYKs46hk2v6pUByDvbSmYauiQZxuiARQ+/AguGjV4yA
|
||||
JZsfAdg6gySAQRAGIv3/k4WOUiCx9uapoihjzI4rsQgKQTqkFBXPfbb0UujpwGY43+tBGJgI2/9A
|
||||
7WaCvXh6XwKaQEoxXtSmZDyen0wbPuTrHRXZMEZWfU0jsqbTQZvMCcNcgV8ulFjlUp9+WzR8Ejfg
|
||||
vTBOP0xyF3DQSdAKOOfjt+L2JjpqWblj+P9r4mH7g+bAjUY7ZFc9Kd0QqjWpIxBbp2PaHNb3CkDY
|
||||
GaUAEIJAVLv/lddZCK1R2xb68FOxQvRNOUGqhRSwaCKW1xIt8MRIBxceMvJgV+uJEGYNhXSCOIBs
|
||||
aDOcwjXg9+EGz4USFzhyQ6V06nIiPCoyhLr2PAm3HOFSq3F1eYst0e53pbSFH3NvyQLyg5nBk65Z
|
||||
/55Z25S6GSBZxNHXLYPEZ0h7vQKwdW4rAIMwDNX//2c7Bm16UvVBhCFUTOOljUsxRazHMxG5iy9C
|
||||
k5BkzIg8udsr52I7XfWmm/wbjjneRXvoJhyUi/pIC0ttJGzwCFIuEpKrOLWm0TB9sO7/Cc8ZcDy3
|
||||
uaeEBfOGnXjy5LKXqjquse2K5ARCVMegIwefWkL/s6WEf8pVP6yxMIhdmaLfKESvLJ8AdJ1JEsAg
|
||||
CAQl/3+zJFaAGVku3qwCHXcaD0whicIlJ2BjvEWJzbnc8sEJg5d5qBkCmws9lR5ZtMz9IlvzZ9oN
|
||||
1XJRxAoaAtdcdaBudBOyeKXYB3LGSmlynFWz6slCZyFeH8npBO6nEUT+mE2uHmgoycjTdQQwvpyH
|
||||
xv6OggQ3Q5ydVyl2CdE/X8VXALauIAmAEATp//8cO7OTAtq1S5bQlIb+wBqBuVXq/rrpEEzpViuV
|
||||
TA63dQ6QbXIwhTy6tQPWGKQ4p1U5uc2VjCaf7eELkFlzUKQP3lrezaoJVwCB9gZ+WXww+WQlXkBK
|
||||
UWLUUROTSsqthPohsfvWRSgMvXsiDJ1v0ucnhZ0FpgiL7UA+uSJfrGpyfALQce44AIMwDI2l3v/C
|
||||
HehQhO3gLPwmAg+IAvh5L/U2c4LdQY4zckgqFctdLJeMNhDKjTljKP/CMYquKDSyUBWBS8aQsNZ1
|
||||
mEk8YTGYUbaxGUPyg76f5UHgevV7/7aN7RxMSUzNWklLqJIo/4FpUtfXJdyr+rD6b/kEGAA++H2l
|
||||
aiCrcAAAAABJRU5ErkJggg==`
|
||||
|
|
@ -16,3 +16,4 @@ screenshot and description:
|
|||
themes as part of experimental theming support.
|
||||
* [TabFrame](tabframe/): demo for the TabFrame widget showing multiple Windows
|
||||
with tabbed interfaces.
|
||||
* [ColorPicker](colorpicker/): demo for the ColorPicker widget.
|
||||
|
|
|
|||
20
eg/colorpicker/README.md
Normal file
20
eg/colorpicker/README.md
Normal file
|
|
@ -0,0 +1,20 @@
|
|||
# ColorPicker Demo
|
||||
|
||||
|
||||
|
||||
This demo shows off the ColorPicker window.
|
||||
|
||||
The ColorPicker lets you ask the user to select a color, visually,
|
||||
using a callback interface. While the UI toolkit doesn't support
|
||||
text input entry, there is a work-around to prompt the user to enter
|
||||
a color by hex code with assistance of your program.
|
||||
|
||||
In this example program, clicking on the Hex color button will prompt
|
||||
you via STDIN (check the terminal window!) to enter a color value. The
|
||||
UI will be frozen until your answer is given. For programs that don't
|
||||
need this, the Hex color button does nothing when clicked.
|
||||
|
||||
## Running It
|
||||
|
||||
From your terminal, just type `go run main.go` from this
|
||||
example's directory.
|
||||
95
eg/colorpicker/main.go
Normal file
95
eg/colorpicker/main.go
Normal file
|
|
@ -0,0 +1,95 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"fmt"
|
||||
"os"
|
||||
"strings"
|
||||
|
||||
"git.kirsle.net/go/render"
|
||||
"git.kirsle.net/go/render/sdl"
|
||||
"git.kirsle.net/go/ui"
|
||||
)
|
||||
|
||||
var WindowColor = render.SkyBlue
|
||||
|
||||
func init() {
|
||||
sdl.DefaultFontFilename = "../DejaVuSans.ttf"
|
||||
}
|
||||
|
||||
func main() {
|
||||
mw, err := ui.NewMainWindow("ColorPicker Demo", 812, 375)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
mw.SetBackground(WindowColor)
|
||||
|
||||
btn := ui.NewButton("Test", ui.NewLabel(ui.Label{
|
||||
Text: "Pick the background color",
|
||||
Font: render.Text{
|
||||
Size: 32,
|
||||
},
|
||||
}))
|
||||
btn.Handle(ui.Click, func(ed ui.EventData) error {
|
||||
colorpicker, err := ui.NewColorPicker(ui.ColorPicker{
|
||||
Title: "Select a background color",
|
||||
Supervisor: mw.Supervisor(),
|
||||
Engine: mw.Engine,
|
||||
Color: WindowColor,
|
||||
|
||||
// Until the UI toolkit has normal text entry controls, this work-around
|
||||
// allows your application to ask the user to enter a hex color code
|
||||
// themselves, using any means available. This is an asynchronous
|
||||
// procedure where you are given a callback function to send your answer
|
||||
// whenever you have it. For this example, look for the prompt
|
||||
// question in your terminal window!
|
||||
OnManualInput: func(callback func(render.Color)) {
|
||||
// Prompt the user to enter a hex color in the terminal.
|
||||
var s string
|
||||
fmt.Fprintf(os.Stderr, "Enter a hexadecimal color code> ")
|
||||
r := bufio.NewReader(os.Stdin)
|
||||
for {
|
||||
s, _ = r.ReadString('\n')
|
||||
if s != "" {
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
// Parse it as a color.
|
||||
fmt.Printf("Answer: %s\n", s)
|
||||
color, err := render.HexColor(strings.TrimSpace(s))
|
||||
if err != nil {
|
||||
fmt.Printf("%s\n", err)
|
||||
return
|
||||
}
|
||||
|
||||
// Ping the callback function with our answer.
|
||||
callback(color)
|
||||
},
|
||||
})
|
||||
if err != nil {
|
||||
fmt.Printf("Error initializing colorpicker: %s\n", err)
|
||||
return err
|
||||
}
|
||||
|
||||
colorpicker.Center(mw.Engine.WindowSize())
|
||||
colorpicker.Then(func(color render.Color) {
|
||||
WindowColor = color
|
||||
mw.SetBackground(WindowColor)
|
||||
})
|
||||
colorpicker.OnCancel(func() {
|
||||
fmt.Println("ColorPicker was dismissed by user")
|
||||
})
|
||||
|
||||
fmt.Printf("Open ColorPicker: %+v\n", colorpicker)
|
||||
colorpicker.Show()
|
||||
return nil
|
||||
})
|
||||
mw.Place(btn, ui.Place{
|
||||
Center: true,
|
||||
Middle: true,
|
||||
})
|
||||
|
||||
mw.MainLoop()
|
||||
}
|
||||
BIN
eg/colorpicker/screenshot.png
Normal file
BIN
eg/colorpicker/screenshot.png
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 26 KiB |
4
go.mod
4
go.mod
|
|
@ -3,7 +3,7 @@ module git.kirsle.net/go/ui
|
|||
go 1.16
|
||||
|
||||
require (
|
||||
git.kirsle.net/go/render v0.0.0-20210614025954-d77f5056b782
|
||||
git.kirsle.net/go/render v0.0.0-20211231003948-9e640ab5c3da
|
||||
github.com/veandco/go-sdl2 v0.4.8 // indirect
|
||||
golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d
|
||||
golang.org/x/image v0.0.0-20211028202545-6944b10bf410
|
||||
)
|
||||
|
|
|
|||
4
go.sum
4
go.sum
|
|
@ -2,6 +2,8 @@ git.kirsle.net/go/render v0.0.0-20210104010442-b4a1979a8ba1 h1:wGQLjBnWvqx7rU43y
|
|||
git.kirsle.net/go/render v0.0.0-20210104010442-b4a1979a8ba1/go.mod h1:ss7pvZbGWrMaDuZwyUTjV9+T0AJwAkxZZHwMFsvHrkk=
|
||||
git.kirsle.net/go/render v0.0.0-20210614025954-d77f5056b782 h1:Ko+NvZxmJbW+M1dA2jCSnV6qSpkLoZASramE6ltlf/s=
|
||||
git.kirsle.net/go/render v0.0.0-20210614025954-d77f5056b782/go.mod h1:ss7pvZbGWrMaDuZwyUTjV9+T0AJwAkxZZHwMFsvHrkk=
|
||||
git.kirsle.net/go/render v0.0.0-20211231003948-9e640ab5c3da h1:wbeh/hHiwmXqf/3VPrbE/PADTcT1niQWhxxK81Ize3o=
|
||||
git.kirsle.net/go/render v0.0.0-20211231003948-9e640ab5c3da/go.mod h1:ss7pvZbGWrMaDuZwyUTjV9+T0AJwAkxZZHwMFsvHrkk=
|
||||
github.com/veandco/go-sdl2 v0.4.1/go.mod h1:FB+kTpX9YTE+urhYiClnRzpOXbiWgaU3+5F2AB78DPg=
|
||||
github.com/veandco/go-sdl2 v0.4.7 h1:VfpCM+LfEGDbHdByglCo2bcBsevjFvzl8W0f6VLNitg=
|
||||
github.com/veandco/go-sdl2 v0.4.7/go.mod h1:OROqMhHD43nT4/i9crJukyVecjPNYYuCofep6SNiAjY=
|
||||
|
|
@ -12,6 +14,8 @@ golang.org/x/image v0.0.0-20210504121937-7319ad40d33e h1:PzJMNfFQx+QO9hrC1GwZ4Bo
|
|||
golang.org/x/image v0.0.0-20210504121937-7319ad40d33e/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
|
||||
golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d h1:RNPAfi2nHY7C2srAV8A49jpsYr0ADedCk1wq6fTMTvs=
|
||||
golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d/go.mod h1:023OzeP/+EPmXeapQh35lcL3II3LrY8Ic+EFFKVhULM=
|
||||
golang.org/x/image v0.0.0-20211028202545-6944b10bf410 h1:hTftEOvwiOq2+O8k2D5/Q7COC7k5Qcrgc2TFURJYnvQ=
|
||||
golang.org/x/image v0.0.0-20211028202545-6944b10bf410/go.mod h1:023OzeP/+EPmXeapQh35lcL3II3LrY8Ic+EFFKVhULM=
|
||||
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
|
||||
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
|
||||
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
|
||||
|
|
|
|||
|
|
@ -53,6 +53,22 @@ type EventData struct {
|
|||
|
||||
// Supervisor is the reference to the supervisor who sent the event.
|
||||
Supervisor *Supervisor
|
||||
|
||||
// Widget is a reference to the widget receiving the event.
|
||||
Widget Widget
|
||||
|
||||
// Clicked is true if the primary mouse button is down during
|
||||
// a MouseMove
|
||||
Clicked bool
|
||||
}
|
||||
|
||||
// RelativePoint returns the ed.Point adjusted to be relative to the widget on screen.
|
||||
func (ed EventData) RelativePoint() render.Point {
|
||||
if ed.Widget == nil {
|
||||
return render.NewPoint(-1, -1)
|
||||
}
|
||||
abs := AbsolutePosition(ed.Widget)
|
||||
return render.NewPoint(ed.Point.X-abs.X, ed.Point.Y-abs.Y)
|
||||
}
|
||||
|
||||
// Supervisor keeps track of widgets of interest to notify them about
|
||||
|
|
@ -151,6 +167,7 @@ func (s *Supervisor) Loop(ev *event.State) error {
|
|||
// The mouse has been released. TODO: make mouse button important?
|
||||
for _, child := range hovering {
|
||||
child.widget.Event(Drop, EventData{
|
||||
Widget: child.widget,
|
||||
Point: XY,
|
||||
})
|
||||
}
|
||||
|
|
@ -159,6 +176,7 @@ func (s *Supervisor) Loop(ev *event.State) error {
|
|||
// If we have a target widget being dragged, send it mouse events.
|
||||
if target := s.dd.Widget(); target != nil {
|
||||
target.Event(DragMove, EventData{
|
||||
Widget: target,
|
||||
Point: XY,
|
||||
})
|
||||
}
|
||||
|
|
@ -347,21 +365,17 @@ func (s *Supervisor) runWidgetEvents(XY render.Point, ev *event.State,
|
|||
// Cursor has intersected the widget.
|
||||
if _, ok := s.hovering[id]; !ok {
|
||||
handle(w.Event(MouseOver, EventData{
|
||||
Widget: w,
|
||||
Point: XY,
|
||||
}))
|
||||
s.hovering[id] = nil
|
||||
}
|
||||
|
||||
// Mouse movement. NOTE: it is intentional that this fires on
|
||||
// every tick even if XY was the same as last time.
|
||||
handle(w.Event(MouseMove, EventData{
|
||||
Point: XY,
|
||||
}))
|
||||
|
||||
isClicked, _ := s.clicked[id]
|
||||
isClicked := s.clicked[id]
|
||||
if ev.Button1 {
|
||||
if !isClicked {
|
||||
err := w.Event(MouseDown, EventData{
|
||||
Widget: w,
|
||||
Point: XY,
|
||||
})
|
||||
handle(err)
|
||||
|
|
@ -369,13 +383,24 @@ func (s *Supervisor) runWidgetEvents(XY render.Point, ev *event.State,
|
|||
}
|
||||
} else if isClicked {
|
||||
handle(w.Event(MouseUp, EventData{
|
||||
Widget: w,
|
||||
Point: XY,
|
||||
}))
|
||||
handle(w.Event(Click, EventData{
|
||||
Widget: w,
|
||||
Point: XY,
|
||||
}))
|
||||
delete(s.clicked, id)
|
||||
}
|
||||
|
||||
// Mouse movement. NOTE: it is intentional that this fires on
|
||||
// every tick even if XY was the same as last time.
|
||||
handle(w.Event(MouseMove, EventData{
|
||||
Widget: w,
|
||||
Point: XY,
|
||||
Clicked: ev.Button1,
|
||||
}))
|
||||
|
||||
}
|
||||
for _, child := range outside {
|
||||
var (
|
||||
|
|
@ -394,6 +419,7 @@ func (s *Supervisor) runWidgetEvents(XY render.Point, ev *event.State,
|
|||
// Cursor is not intersecting the widget.
|
||||
if _, ok := s.hovering[id]; ok {
|
||||
handle(w.Event(MouseOut, EventData{
|
||||
Widget: w,
|
||||
Point: XY,
|
||||
}))
|
||||
delete(s.hovering, id)
|
||||
|
|
@ -401,6 +427,7 @@ func (s *Supervisor) runWidgetEvents(XY render.Point, ev *event.State,
|
|||
|
||||
if _, ok := s.clicked[id]; ok {
|
||||
handle(w.Event(MouseUp, EventData{
|
||||
Widget: w,
|
||||
Point: XY,
|
||||
}))
|
||||
delete(s.clicked, id)
|
||||
|
|
|
|||
|
|
@ -119,6 +119,13 @@ func (w *TabFrame) SetTabsHidden(hidden bool) {
|
|||
}
|
||||
}
|
||||
|
||||
// Header returns access to the ui.Frame that holds the tab buttons. Use
|
||||
// at your own risk -- the UI arrangement in this Frame is not guaranteed
|
||||
// stable.
|
||||
func (w *TabFrame) Header() *Frame {
|
||||
return w.header
|
||||
}
|
||||
|
||||
// set the tab style between active and inactive
|
||||
func (w *TabFrame) setButtonStyle(button *Button, active bool) {
|
||||
var style = button.GetStyle()
|
||||
|
|
|
|||
|
|
@ -75,6 +75,9 @@ type Widget interface {
|
|||
|
||||
// Render the final widget onto the drawing engine.
|
||||
Present(render.Engine, render.Point)
|
||||
|
||||
// Destroy: implement this if you have resources to free up on teardown.
|
||||
Destroy()
|
||||
}
|
||||
|
||||
// Config holds common base widget configs for quick configuration.
|
||||
|
|
@ -523,3 +526,6 @@ func (w *BaseWidget) Handle(event Event, fn func(EventData) error) {
|
|||
|
||||
// OnMouseOut should be overridden on widgets who want this event.
|
||||
func (w *BaseWidget) OnMouseOut(render.Point) {}
|
||||
|
||||
// Destroy does nothing on the base widget. Implement it for widgets which need it.
|
||||
func (w *BaseWidget) Destroy() {}
|
||||
|
|
|
|||
19
window.go
19
window.go
|
|
@ -321,6 +321,20 @@ func (w *Window) Size() render.Rect {
|
|||
return w.body.Size()
|
||||
}
|
||||
|
||||
// Resize the window.
|
||||
func (w *Window) Resize(size render.Rect) {
|
||||
w.BaseWidget.Resize(size)
|
||||
w.body.Resize(size)
|
||||
}
|
||||
|
||||
// Center the window on screen by providing your screen (app window) size.
|
||||
func (w *Window) Center(width, height int) {
|
||||
w.MoveTo(render.Point{
|
||||
X: (width / 2) - (w.Size().W / 2),
|
||||
Y: (height / 2) - (w.Size().H / 2),
|
||||
})
|
||||
}
|
||||
|
||||
// Close the window, hiding it from display and calling its CloseWindow handler.
|
||||
func (w *Window) Close() {
|
||||
w.Hide()
|
||||
|
|
@ -395,3 +409,8 @@ func (w *Window) Present(e render.Engine, P render.Point) {
|
|||
// Call the BaseWidget Present in case we have subscribers.
|
||||
w.BaseWidget.Present(e, P)
|
||||
}
|
||||
|
||||
// Destroy hides the window.
|
||||
func (w *Window) Destroy() {
|
||||
w.Hide()
|
||||
}
|
||||
|
|
|
|||
|
|
@ -173,6 +173,7 @@ func (s *Supervisor) CloseAllWindows() int {
|
|||
)
|
||||
for node != nil {
|
||||
i++
|
||||
node.window.Destroy()
|
||||
node.window.Hide()
|
||||
node = node.next
|
||||
}
|
||||
|
|
@ -183,8 +184,10 @@ func (s *Supervisor) CloseAllWindows() int {
|
|||
func (s *Supervisor) CloseActiveWindow() bool {
|
||||
var node = s.winFocus
|
||||
if node != nil {
|
||||
node.window.Destroy()
|
||||
node.window.Hide()
|
||||
s.winFocus = node.next
|
||||
s.winFocus.window.SetFocus(true)
|
||||
return true
|
||||
}
|
||||
return false
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user