119 lines
3.2 KiB
Go
119 lines
3.2 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/text"
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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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// TextInput is a single-line editable text box.
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type TextInput struct {
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tomo.TextBox
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text []rune
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on struct {
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enter event.FuncBroadcaster
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edit event.FuncBroadcaster
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}
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}
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// NewTextInput creates a new text input containing the specified text.
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func NewTextInput (text string) *TextInput {
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this := &TextInput { TextBox: tomo.NewTextBox() }
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this.SetRole(tomo.R("objects", "TextInput", ""))
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tomo.Apply(this)
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this.SetAlign(tomo.AlignStart, tomo.AlignMiddle)
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this.SetText(text)
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this.SetFocusable(true)
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this.SetSelectable(true)
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this.SetOverflow(true, false)
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this.OnKeyDown(this.handleKeyDown)
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this.OnScroll(this.handleScroll)
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return this
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}
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// SetText sets the text content of the input.
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func (this *TextInput) SetText (text string) {
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this.text = []rune(text)
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this.TextBox.SetText(text)
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}
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// Text returns the text content of the input.
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func (this *TextInput) Text () string {
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return string(this.text)
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}
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// OnEnter specifies a function to be called when the user presses enter within
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// the text input.
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func (this *TextInput) OnEnter (callback func ()) event.Cookie {
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return this.on.enter.Connect(callback)
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}
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// OnEdit specifies a function to be called when the user edits the input text.
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func (this *TextInput) OnEdit (callback func ()) event.Cookie {
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return this.on.edit.Connect(callback)
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}
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func (this *TextInput) handleKeyDown (key input.Key, numpad bool) {
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dot := this.Dot()
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modifiers := this.Modifiers()
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word := modifiers.Control
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sel := modifiers.Shift
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changed := false
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// TODO all dot control (movement, selection, etc) should be done in the
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// backend. (editing should be done here, though)
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switch {
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case key == input.KeyEnter:
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this.on.enter.Broadcast()
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case key == input.KeyHome || (modifiers.Alt && key == input.KeyLeft):
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dot.End = 0
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if !sel { dot.Start = dot.End }
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case key == input.KeyEnd || (modifiers.Alt && key == input.KeyRight):
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dot.End = len(this.text)
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if !sel { dot.Start = dot.End }
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case key == input.KeyLeft:
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if sel {
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dot = text.SelectLeft(this.text, dot, word)
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} else {
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dot = text.MoveLeft(this.text, dot, word)
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}
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case key == input.KeyRight:
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if sel {
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dot = text.SelectRight(this.text, dot, word)
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} else {
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dot = text.MoveRight(this.text, dot, word)
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}
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case key == input.KeyBackspace:
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this.text, dot = text.Backspace(this.text, dot, word)
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changed = true
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case key == input.KeyDelete:
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this.text, dot = text.Delete(this.text, dot, word)
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changed = true
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case key == input.Key('a') && modifiers.Control:
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dot.Start = 0
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dot.End = len(this.text)
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case key.Printable():
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this.text, dot = text.Type(this.text, dot, rune(key))
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changed = true
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}
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this.Select(dot)
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if changed {
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this.SetText(string(this.text))
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this.on.edit.Broadcast()
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}
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}
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// Type types a character at the current dot position.
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func (this *TextInput) Type (char rune) {
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dot := this.Dot()
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this.text, dot = text.Type(this.text, dot, rune(char))
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this.Select(dot)
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this.SetText(string(this.text))
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}
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func (this *TextInput) handleScroll (x, y float64) {
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this.ScrollTo(this.ContentBounds().Min.Add(image.Pt(int(x), int(y))))
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}
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