uiterm: remove *Ui argument from View methods

uiterm/label.go

@@ -11,20 +11,25 @@ type Label struct {
 	Fg   Attribute
 	Bg   Attribute
 
+	ui *Ui
 	x0, y0, x1, y1 int
 }
 
-func (l *Label) setActive(ui *Ui, active bool) {
+func (l *Label) uiInitialize(ui *Ui) {
+	l.ui = ui
 }
 
-func (l *Label) setBounds(ui *Ui, x0, y0, x1, y1 int) {
+func (l *Label) setActive(active bool) {
+}
+
+func (l *Label) setBounds(x0, y0, x1, y1 int) {
 	l.x0 = x0
 	l.y0 = y0
 	l.x1 = x1
 	l.y1 = y1
 }
 
-func (l *Label) draw(ui *Ui) {
+func (l *Label) draw() {
 	reader := strings.NewReader(l.Text)
 	for y := l.y0; y < l.y1; y++ {
 		for x := l.x0; x < l.x1; x++ {
@@ -39,8 +44,8 @@ func (l *Label) draw(ui *Ui) {
 	}
 }
 
-func (l *Label) keyEvent(ui *Ui, mod Modifier, key Key) {
+func (l *Label) keyEvent(mod Modifier, key Key) {
 }
 
-func (l *Label) characterEvent(ui *Ui, chr rune) {
+func (l *Label) characterEvent(chr rune) {
 }

uiterm/textbox.go

@@ -16,22 +16,27 @@ type Textbox struct {
 
 	Input InputFunc
 
+	ui *Ui
 	active         bool
 	x0, y0, x1, y1 int
 }
 
-func (t *Textbox) setBounds(ui *Ui, x0, y0, x1, y1 int) {
+func (t *Textbox) uiInitialize(ui *Ui) {
+	t.ui = ui
+}
+
+func (t *Textbox) setBounds(x0, y0, x1, y1 int) {
 	t.x0 = x0
 	t.y0 = y0
 	t.x1 = x1
 	t.y1 = y1
 }
 
-func (t *Textbox) setActive(ui *Ui, active bool) {
+func (t *Textbox) setActive(active bool) {
 	t.active = active
 }
 
-func (t *Textbox) draw(ui *Ui) {
+func (t *Textbox) draw() {
 	var setCursor = false
 	reader := strings.NewReader(t.Text)
 	for y := t.y0; y < t.y1; y++ {
@@ -51,7 +56,7 @@ func (t *Textbox) draw(ui *Ui) {
 	}
 }
 
-func (t *Textbox) keyEvent(ui *Ui, mod Modifier, key Key) {
+func (t *Textbox) keyEvent(mod Modifier, key Key) {
 	redraw := false
 	switch key {
 	case KeyCtrlC:
@@ -59,7 +64,7 @@ func (t *Textbox) keyEvent(ui *Ui, mod Modifier, key Key) {
 		redraw = true
 	case KeyEnter:
 		if t.Input != nil {
-			t.Input(ui, t, t.Text)
+			t.Input(t.ui, t, t.Text)
 		}
 		t.Text = ""
 		redraw = true
@@ -76,13 +81,13 @@ func (t *Textbox) keyEvent(ui *Ui, mod Modifier, key Key) {
 		}
 	}
 	if redraw {
-		t.draw(ui)
+		t.draw()
 		termbox.Flush()
 	}
 }
 
-func (t *Textbox) characterEvent(ui *Ui, chr rune) {
+func (t *Textbox) characterEvent(chr rune) {
 	t.Text = t.Text + string(chr)
-	t.draw(ui)
+	t.draw()
 	termbox.Flush()
 }

uiterm/textview.go

@@ -13,13 +13,19 @@ type Textview struct {
 	Bg          Attribute
 
 	parsedLines    []string
+
+	ui *Ui
 	x0, y0, x1, y1 int
 }
 
-func (t *Textview) setActive(ui *Ui, active bool) {
+func (t *Textview) uiInitialize(ui *Ui) {
+	t.ui = ui
+}
+
+func (t *Textview) setActive(active bool) {
 }
 
-func (t *Textview) setBounds(ui *Ui, x0, y0, x1, y1 int) {
+func (t *Textview) setBounds(x0, y0, x1, y1 int) {
 	t.x0 = x0
 	t.y0 = y0
 	t.x1 = x1
@@ -96,7 +102,7 @@ func (t *Textview) Clear() {
 	t.parsedLines = nil
 }
 
-func (t *Textview) draw(ui *Ui) {
+func (t *Textview) draw() {
 	var reader *strings.Reader
 	line := len(t.parsedLines) - 1 - t.CurrentLine
 	if line < 0 {
@@ -134,8 +140,8 @@ func (t *Textview) draw(ui *Ui) {
 	}
 }
 
-func (t *Textview) keyEvent(ui *Ui, mod Modifier, key Key) {
+func (t *Textview) keyEvent(mod Modifier, key Key) {
 }
 
-func (t *Textview) characterEvent(ui *Ui, chr rune) {
+func (t *Textview) characterEvent(chr rune) {
 }

uiterm/tree.go

@@ -28,6 +28,8 @@ type Tree struct {
 
 	lines          []renderedTreeItem
 	activeLine     int
+
+	ui *Ui
 	active         bool
 	x0, y0, x1, y1 int
 }
@@ -42,7 +44,11 @@ func bounded(i, lower, upper int) int {
 	return i
 }
 
-func (t *Tree) setBounds(ui *Ui, x0, y0, x1, y1 int) {
+func (t *Tree) uiInitialize(ui *Ui) {
+	t.ui = ui
+}
+
+func (t *Tree) setBounds(x0, y0, x1, y1 int) {
 	t.x0 = x0
 	t.y0 = y0
 	t.x1 = x1
@@ -85,7 +91,7 @@ func (t *Tree) rebuild_rec(parent TreeItem, level int) []renderedTreeItem {
 	return lines
 }
 
-func (t *Tree) draw(ui *Ui) {
+func (t *Tree) draw() {
 	if t.lines == nil {
 		t.Rebuild()
 	}
@@ -118,11 +124,11 @@ func (t *Tree) draw(ui *Ui) {
 	}
 }
 
-func (t *Tree) setActive(ui *Ui, active bool) {
+func (t *Tree) setActive(active bool) {
 	t.active = active
 }
 
-func (t *Tree) keyEvent(ui *Ui, mod Modifier, key Key) {
+func (t *Tree) keyEvent(mod Modifier, key Key) {
 	switch key {
 	case KeyArrowUp:
 		t.activeLine = bounded(t.activeLine-1, 0, len(t.lines)-1)
@@ -130,11 +136,11 @@ func (t *Tree) keyEvent(ui *Ui, mod Modifier, key Key) {
 		t.activeLine = bounded(t.activeLine+1, 0, len(t.lines)-1)
 	case KeyEnter:
 		if t.Listener != nil && t.activeLine >= 0 && t.activeLine < len(t.lines) {
-			t.Listener(ui, t, t.lines[t.activeLine].Item)
+			t.Listener(t.ui, t, t.lines[t.activeLine].Item)
 		}
 	}
-	ui.Refresh()
+	t.ui.Refresh()
 }
 
-func (t *Tree) characterEvent(ui *Ui, ch rune) {
+func (t *Tree) characterEvent(ch rune) {
 }

uiterm/ui.go

@@ -52,7 +52,7 @@ func (ui *Ui) Refresh() {
 		termbox.Clear(termbox.Attribute(ui.fg), termbox.Attribute(ui.bg))
 		termbox.HideCursor()
 		for _, element := range ui.elements {
-			element.View.draw(ui)
+			element.View.draw()
 		}
 		termbox.Flush()
 	}
@@ -65,11 +65,11 @@ func (ui *Ui) Active() View {
 func (ui *Ui) SetActive(name string) {
 	element, _ := ui.elements[name]
 	if ui.activeElement != nil {
-		ui.activeElement.View.setActive(ui, false)
+		ui.activeElement.View.setActive(false)
 	}
 	ui.activeElement = element
 	if element != nil {
-		element.View.setActive(ui, true)
+		element.View.setActive(true)
 	}
 	ui.Refresh()
 }
@@ -123,7 +123,7 @@ func (ui *Ui) Run() error {
 
 func (ui *Ui) onCharacterEvent(ch rune) {
 	if ui.activeElement != nil {
-		ui.activeElement.View.characterEvent(ui, ch)
+		ui.activeElement.View.characterEvent(ch)
 	}
 }
 
@@ -134,7 +134,7 @@ func (ui *Ui) onKeyEvent(mod Modifier, key Key) {
 		}
 	}
 	if ui.activeElement != nil {
-		ui.activeElement.View.keyEvent(ui, mod, key)
+		ui.activeElement.View.keyEvent(mod, key)
 	}
 }
 
@@ -153,8 +153,9 @@ func (ui *Ui) SetView(name string, x0, y0, x1, y1 int, view View) {
 			Y1:   y1,
 			View: view,
 		}
+		view.uiInitialize(ui)
 	}
-	view.setBounds(ui, x0, y0, x1, y1)
+	view.setBounds(x0, y0, x1, y1)
 }
 
 func (ui *Ui) View(name string) View {

uiterm/view.go

@@ -1,9 +1,10 @@
 package uiterm
 
 type View interface {
-	setActive(ui *Ui, active bool)
-	setBounds(ui *Ui, x0, y0, x1, y1 int)
-	draw(ui *Ui)
-	keyEvent(ui *Ui, mod Modifier, key Key)
-	characterEvent(ui *Ui, ch rune)
+	uiInitialize(ui *Ui)
+	setActive(active bool)
+	setBounds(x0, y0, x1, y1 int)
+	draw()
+	keyEvent(mod Modifier, key Key)
+	characterEvent(ch rune)
 }