gesture,widget: add hovered property

Signed-off-by: Egon Elbre <egonelbre@gmail.com>

gesture/gesture.go

@@ -125,6 +125,16 @@ func (c *Click) Add(ops *op.Ops) {
 	op.Add(ops)
 }
 
+// Hovered returns whether a pointer is inside the area.
+func (c *Click) Hovered() bool {
+	return c.entered
+}
+
+// Pressed returns whether a pointer is pressing.
+func (c *Click) Pressed() bool {
+	return c.pressed
+}
+
 // Events returns the next click event, if any.
 func (c *Click) Events(q event.Queue) []ClickEvent {
 	var events []ClickEvent

widget/bool.go

@@ -20,6 +20,16 @@ func (b *Bool) Changed() bool {
 	return changed
 }
 
+// Hovered returns whether pointer is over the element.
+func (b *Bool) Hovered() bool {
+	return b.clk.Hovered()
+}
+
+// Pressed returns whether pointer is pressing the element.
+func (b *Bool) Pressed() bool {
+	return b.clk.Pressed()
+}
+
 func (b *Bool) History() []Press {
 	return b.clk.History()
 }

widget/button.go

@@ -58,6 +58,16 @@ func (b *Clickable) Clicked() bool {
 	return true
 }
 
+// Hovered returns whether pointer is over the element.
+func (b *Clickable) Hovered() bool {
+	return b.click.Hovered()
+}
+
+// Pressed returns whether pointer is pressing the element.
+func (b *Clickable) Pressed() bool {
+	return b.click.Pressed()
+}
+
 // Clicks returns and clear the clicks since the last call to Clicks.
 func (b *Clickable) Clicks() []Click {
 	clicks := b.clicks