Recursive UI elements support

2 files changed, 40 insertions, 6 deletions

diff --git a/engine/Dynamic/Descriptors/UIElement.go b/engine/Dynamic/Descriptors/UIElement.go
index da523e9..0e59c9a 100644
--- a/engine/Dynamic/Descriptors/UIElement.go
+++ b/engine/Dynamic/Descriptors/UIElement.go
@@ -14,6 +14,9 @@ type UIElementDescriptor struct {
 	Weight float32
 	Style StyleDescriptor
 
+	// For recursive elements
+	BackgroundElement *UIElementDescriptor
+
 	// For labels
 	Text string
 	Alignment string
@@ -64,11 +67,22 @@ func parseAsLabel(base *UIElementDescriptor) ui.UIElement {
 		alignment = ui.Start
 	}
 
+	var child ui.UIElement = nil
+	if base.BackgroundElement != nil {
+		var parsed, err = base.BackgroundElement.Parse()
+		if err == nil {
+			child = parsed
+		} else {
+			rl.TraceLog(rl.LogWarning, "Failed to parse a background element of a label: %v", err.Error())
+		}
+	}
+
 	return &ui.Label {
 		Weight: base.Weight,
 		Text: base.Text,
 		Alignment: alignment,
 		Style: base.Style.Parse(),
+		BackgroundElement: child,
 	}
 }
 
@@ -111,7 +125,7 @@ func parseAsGridColumn(base *UIElementDescriptor) ui.UIElement {
 func parseAsImage(base *UIElementDescriptor) ui.UIElement {
 	var texture, err = components.Resources.Textures.GetTextureByName(base.TextureName)
 	if err != nil {
-		rl.TraceLog(rl.LogWarning, "Failed to parse a texture %s requested by an inage UI element: %v", base.TextureName, err.Error())
+		rl.TraceLog(rl.LogWarning, "Failed to parse a texture %s requested by an image UI element: %v", base.TextureName, err.Error())
 		return nil
 	}
 	var outp = ui.Image {
diff --git a/engine/UI/Label.go b/engine/UI/Label.go
index 8f60f10..9d47187 100644
--- a/engine/UI/Label.go
+++ b/engine/UI/Label.go
@@ -37,13 +37,17 @@ type Label struct {
 	Alignment TextAlignment
 
 	Style Style `json:"-"`
+	BackgroundElement UIElement
 }
 
-func (base *Label) Init(*Menu) {
+func (base *Label) Init(menu *Menu) {
 	base.Style.FillMissing(defaultLabelStyle)
 	if base.Weight == 0 {
 		base.Weight = 1
 	}
+	if base.BackgroundElement != nil {
+		base.BackgroundElement.Init(menu)
+	}
 }
 
 func (base *Label) Destroy() {
@@ -51,10 +55,7 @@ func (base *Label) Destroy() {
 
 func (base *Label) Draw(position *rl.Rectangle) {
 	// rl.TraceLog(rl.LogInfo, "Drawn at %v/%v/%v/%v", position.X, position.Y, position.Width, position.Height)
-	rl.DrawRectangleRounded(*position,
-		*base.Style.Roundness, 
-		0, // Assume the segments param is always 0 - it doesn't really matter without a border
-		*base.Style.BacgroundColor)
+	base.drawBackground(position)
 	var textHeight = base.getTextHeight(position)
 	var textY = int32(position.Y + *base.Style.Padding)
 	if base.Alignment == Center {
@@ -67,6 +68,25 @@ func (base *Label) Draw(position *rl.Rectangle) {
 		*base.Style.FontColor)
 }
 
+func (base *Label) drawBackground(position *rl.Rectangle) {
+	if base.BackgroundElement == nil {
+		base.drawSimpleBackground(position)
+	} else {
+		base.drawBackgroundElement(position)
+	}
+}
+
+func (base *Label) drawSimpleBackground(position *rl.Rectangle) {
+	rl.DrawRectangleRounded(*position,
+		*base.Style.Roundness, 
+		0, // Assume the segments param is always 0 - it doesn't really matter without a border
+		*base.Style.BacgroundColor)
+}
+
+func (base *Label) drawBackgroundElement(position *rl.Rectangle) {
+	base.BackgroundElement.Draw(position)
+}
+
 func (base *Label) GetOccupationWeight() float32 {
 	return base.Weight
 }