package objects import "git.tebibyte.media/tomo/tomo" import "git.tebibyte.media/tomo/tomo/theme" import "git.tebibyte.media/tomo/tomo/input" import "git.tebibyte.media/tomo/tomo/event" import "git.tebibyte.media/tomo/objects/layouts" var buttonLayout = layouts.NewGrid([]bool { true }, []bool { true }) var iconButtonLayout = layouts.NewGrid([]bool { false }, []bool { true }) var bothButtonLayout = layouts.NewGrid([]bool { false, true }, []bool { true }) // Button is a clickable button. type Button struct { tomo.ContainerBox label *Label icon *Icon labelActive bool on struct { click event.FuncBroadcaster } } // NewButton creates a new button with the specified text. func NewButton (text string) *Button { box := &Button { ContainerBox: tomo.NewContainerBox(), label: NewLabel(text), } theme.Apply(box, theme.R("objects", "Button", "")) box.label.SetAlign(tomo.AlignMiddle, tomo.AlignMiddle) box.SetLayout(buttonLayout) box.SetText(text) box.CaptureDND(true) box.CaptureMouse(true) box.CaptureScroll(true) box.CaptureKeyboard(true) box.OnMouseUp(box.handleMouseUp) box.OnKeyUp(box.handleKeyUp) box.SetFocusable(true) return box } // SetText sets the text of the button's label. func (this *Button) SetText (text string) { this.label.SetText(text) if this.labelActive && text == "" { this.Delete(this.label) this.labelActive = false } if !this.labelActive && text != "" { this.Add(this.label) this.labelActive = true } this.applyLayout() } // SetIcon sets an icon for this button. Setting the icon to IconUnknown will // remove it. func (this *Button) SetIcon (id theme.Icon) { if this.icon != nil { this.Delete(this.icon) } var icon *Icon; if id != theme.IconUnknown { icon = NewIcon(id, theme.IconSizeSmall) } this.icon = icon if this.icon != nil { this.Insert(this.icon, this.label) } this.applyLayout() } // OnClick specifies a function to be called when the button is clicked. func (this *Button) OnClick (callback func ()) event.Cookie { return this.on.click.Connect(callback) } func (this *Button) applyLayout () { if this.labelActive && this.icon == nil { this.SetLayout(buttonLayout) } else if !this.labelActive && this.icon != nil { this.SetLayout(iconButtonLayout) } else { this.SetLayout(bothButtonLayout) } } func (this *Button) handleKeyUp (key input.Key, numberPad bool) { if key != input.KeyEnter && key != input.Key(' ') { return } this.on.click.Broadcast() } func (this *Button) handleMouseUp (button input.Button) { if button != input.ButtonLeft { return } if this.MousePosition().In(this.Bounds()) { this.on.click.Broadcast() } }