Removed a bunch of redundant draw calls

Most were related to a but with the keynav api

backends/x/window.go

@@ -126,9 +126,10 @@ func (window *Window) Adopt (child elements.Element) {
 			window.childMinimumSizeChangeCallback (
 				child.MinimumSize())
 		})
-		window.resizeChildToFit()
-		window.childMinimumSizeChangeCallback(child.MinimumSize())
-		window.redrawChildEntirely()
+		if !window.childMinimumSizeChangeCallback(child.MinimumSize()) {
+			window.resizeChildToFit()
+			window.redrawChildEntirely()
+		}
 	}
 }
 
@@ -303,7 +304,7 @@ func (window *Window) paste (canvas canvas.Canvas) (updatedRegion image.Rectangl
 	return bounds
 }
 
-func (window *Window) childMinimumSizeChangeCallback (width, height int) {
+func (window *Window) childMinimumSizeChangeCallback (width, height int) (resized bool) {
 	icccm.WmNormalHintsSet (
 		window.backend.connection,
 		window.xWindow.Id,
@@ -319,14 +320,17 @@ func (window *Window) childMinimumSizeChangeCallback (width, height int) {
 	if newWidth != window.metrics.width ||
 		newHeight != window.metrics.height {
 		window.xWindow.Resize(newWidth, newHeight)
+		return true
 	}
+
+	return false
 }
 
 func (window *Window) childSelectionRequestCallback () (granted bool) {
-	if child, ok := window.child.(elements.Focusable); ok {
-		child.HandleFocus(input.KeynavDirectionNeutral)
+	if _, ok := window.child.(elements.Focusable); ok {
+		return true
 	}
-	return true
+	return false
 }
 
 func (window *Window) childSelectionMotionRequestCallback (

elements/basic/button.go

@@ -1,6 +1,7 @@
 package basicElements
 
 import "image"
+// import "runtime/debug"
 import "git.tebibyte.media/sashakoshka/tomo/input"
 import "git.tebibyte.media/sashakoshka/tomo/theme"
 import "git.tebibyte.media/sashakoshka/tomo/config"
@@ -36,7 +37,7 @@ func NewButton (text string) (element *Button) {
 }
 
 func (element *Button) HandleMouseDown (x, y int, button input.Button) {
-	if !element.Enabled()  { return }
+	if !element.Enabled() { return }
 	if !element.Focused() { element.Focus() }
 	if button != input.ButtonLeft { return }
 	element.pressed = true
@@ -45,16 +46,15 @@ func (element *Button) HandleMouseDown (x, y int, button input.Button) {
 
 func (element *Button) HandleMouseUp (x, y int, button input.Button) {
 	if button != input.ButtonLeft { return }
+	// println("handling mouse up")
 	element.pressed = false
-	element.redo()
-
 	within := image.Point { x, y }.
 		In(element.Bounds())
-		
-	if !element.Enabled() { return }
-	if within && element.onClick != nil {
+	if element.Enabled() && within && element.onClick != nil {
 		element.onClick()
 	}
+	element.redo()
+	// println("done handling mouse up")
 }
 
 func (element *Button) HandleMouseMove (x, y int) { }
@@ -133,6 +133,8 @@ func (element *Button) redo () {
 
 func (element *Button) draw () {
 	bounds := element.Bounds()
+	// println(bounds.String(), element.text)
+	// debug.PrintStack()
 
 	state := theme.PatternState {
 		Disabled: !element.Enabled(),

elements/basic/container.go

@@ -64,7 +64,10 @@ func (element *Container) Adopt (child elements.Element, expand bool) {
 	child.OnDamage (func (region canvas.Canvas) {
 		element.core.DamageRegion(region.Bounds())
 	})
-	child.OnMinimumSizeChange(element.updateMinimumSize)
+	child.OnMinimumSizeChange (func () {
+		element.updateMinimumSize()
+		element.redoAll()
+	})
 	if child0, ok := child.(elements.Flexible); ok {
 		child0.OnFlexibleHeightChange(element.updateMinimumSize)
 	}
@@ -209,6 +212,7 @@ func (element *Container) childPosition (child elements.Element) (position image
 }
 
 func (element *Container) redoAll () {
+	if !element.core.HasImage() { return }
 	// do a layout
 	element.recalculate()
 
@@ -496,7 +500,6 @@ func (element *Container) childFocusRequestCallback (
 			child.HandleUnfocus()
 			return true
 		})
-		child.HandleFocus(input.KeynavDirectionNeutral)
 		return true
 	} else {
 		return false

elements/core/selectable.go

@@ -37,9 +37,14 @@ func (core *FocusableCore) Focused () (focused bool) {
 
 // Focus focuses this element, if its parent element grants the request.
 func (core *FocusableCore) Focus () {
-	if !core.enabled { return }
+	if !core.enabled || core.focused { return }
 	if core.onFocusRequest != nil {
-		core.onFocusRequest()
+		if core.onFocusRequest() {
+			core.focused = true
+			if core.drawFocusChange != nil {
+				core.drawFocusChange()
+			}
+		}
 	}
 }
 
@@ -55,9 +60,11 @@ func (core *FocusableCore) HandleFocus (
 	if core.focused && direction != input.KeynavDirectionNeutral {
 		return false
 	}
-	
-	core.focused = true
-	if core.drawFocusChange != nil { core.drawFocusChange() }
+
+	if core.focused == false {
+		core.focused = true
+		if core.drawFocusChange != nil { core.drawFocusChange() }
+	}
 	return true
 }
 

examples/piano/main.go

@@ -32,6 +32,7 @@ func run () {
 	controlBar := basicElements.NewContainer(basicLayouts.Horizontal { true, false })
 	label := basicElements.NewLabel("Play a song!", false)
 	controlBar.Adopt(label, true)
+	controlBar.Adopt(basicElements.NewLabel("Play a song!", false), true)
 	waveformButton := basicElements.NewButton("Sine")
 	waveformButton.OnClick (func () {
 		waveform = (waveform + 1) % 2