133 lines
3.6 KiB
Go
133 lines
3.6 KiB
Go
package objects
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import "image"
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import "git.tebibyte.media/tomo/tomo"
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import "git.tebibyte.media/tomo/tomo/input"
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// import "git.tebibyte.media/tomo/tomo/event"
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import "git.tebibyte.media/tomo/objects/layouts"
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// Menu is a menu window.
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//
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// Sub-components:
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// - TearLine is a horizontal line at the top of the menu that, when clicked,
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// causes the menu to be "torn off" into a movable window.
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type Menu struct {
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tomo.Window
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parent tomo.Window
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bounds image.Rectangle
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rootContainer tomo.ContainerBox
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tearLine tomo.Object
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torn bool
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}
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// NewMenu creates a new menu with the specified items. The menu will appear
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// directly under the mouse pointer.
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func NewMenu (parent tomo.Window, items ...tomo.Object) (*Menu, error) {
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bounds := (image.Rectangle { }).Add(parent.MousePosition())
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return newMenu(parent, bounds, items...)
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}
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// NewAnchoredMenu creates a new menu with the specified items. The menu will
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// appear directly under the anchor.
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func NewAnchoredMenu (anchor tomo.Object, items ...tomo.Object) (*Menu, error) {
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parent := anchor.GetBox().Window()
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bounds := menuBoundsFromAnchor(anchor)
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return newMenu(parent, bounds, items...)
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}
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func newMenu (parent tomo.Window, bounds image.Rectangle, items ...tomo.Object) (*Menu, error) {
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menu := &Menu { }
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menu.bounds = bounds
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menu.parent = parent
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window, err := menu.parent.NewMenu(menu.bounds)
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if err != nil { return nil, err }
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menu.Window = window
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menu.rootContainer = tomo.NewContainerBox()
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menu.rootContainer.SetAttr(tomo.ALayout(layouts.ContractVertical))
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if !menu.torn {
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menu.tearLine = menu.newTearLine()
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menu.rootContainer.Add(menu.tearLine)
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}
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for _, item := range items {
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menu.rootContainer.Add(item)
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if item, ok := item.(*MenuItem); ok {
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item.OnClick(func () {
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if !menu.torn {
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menu.Close()
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}
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})
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}
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}
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menu.rootContainer.SetRole(tomo.R("objects", "Container"))
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menu.rootContainer.SetTag("menu", true)
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menu.Window.SetRoot(menu.rootContainer)
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return menu, nil
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}
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// TearOff converts this menu into a tear-off menu.
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func (this *Menu) TearOff () {
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if this.torn { return }
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if this.parent == nil { return }
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this.torn = true
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window, err := this.parent.NewChild(this.bounds)
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window.SetIcon(tomo.IconListChoose)
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if err != nil { return }
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visible := this.Window.Visible()
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this.Window.SetRoot(nil)
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this.Window.Close()
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this.rootContainer.Remove(this.tearLine)
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this.rootContainer.SetTag("torn", true)
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this.Window = window
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this.Window.SetRoot(this.rootContainer)
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this.Window.SetVisible(visible)
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}
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func (this *Menu) newTearLine () tomo.Object {
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tearLine := tomo.NewBox()
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tearLine.SetRole(tomo.R("objects", "TearLine"))
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tearLine.SetFocusable(true)
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tearLine.OnMouseEnter(func () {
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tearLine.SetFocused(true)
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})
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tearLine.OnMouseLeave(func () {
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tearLine.SetFocused(false)
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})
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tearLine.OnKeyDown(func (key input.Key, numberPad bool) bool {
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if !isClickingKey(key) { return false }
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return true
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})
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tearLine.OnKeyUp(func (key input.Key, numberPad bool) bool {
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if !isClickingKey(key) { return false }
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this.TearOff()
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return true
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})
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tearLine.OnButtonDown(func (button input.Button) bool {
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if !isClickingButton(button) { return false }
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return true
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})
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tearLine.OnButtonUp(func (button input.Button) bool {
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if !isClickingButton(button) { return false }
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if tearLine.Window().MousePosition().In(tearLine.Bounds()) {
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this.TearOff()
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}
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return true
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})
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return tearLine
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}
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func menuBoundsFromAnchor (anchor tomo.Object) image.Rectangle {
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bounds := anchor.GetBox().Bounds()
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return image.Rect (
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bounds.Min.X, bounds.Max.Y,
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bounds.Max.X, bounds.Max.Y)//.Add(windowBounds.Min)
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}
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