1 files changed, 96 insertions, 0 deletions
diff --git a/find.go b/find.go
new file mode 100644
index 0000000..508967e
--- /dev/null
+++ b/find.go
@@ -0,0 +1,96 @@
+package main
+
+import (
+	"github.com/awesome-gocui/gocui"
+	"go.wit.com/widget"
+)
+
+// returns the widget under the location on the screen
+func findByXY(widget *guiWidget, w int, h int) []*guiWidget {
+	var widgets []*guiWidget
+
+	if !widget.Visible() {
+		// ignore widgets that are not visible
+	} else {
+
+		// check the location to see if this is under (W,H)
+		// if it is, return this widget
+		if (widget.gocuiSize.w0 <= w) && (w <= widget.gocuiSize.w1) &&
+			(widget.gocuiSize.h0 <= h) && (h <= widget.gocuiSize.h1) {
+			widgets = append(widgets, widget)
+			// log.Log(GOCUI, "findByXY() found", widget.WidgetType, w, h)
+		}
+	}
+
+	// search through the children widgets in the binary tree
+	for _, child := range widget.children {
+		widgets = append(widgets, findByXY(child, w, h)...)
+	}
+
+	return widgets
+}
+
+func findUnderMouse() *guiWidget {
+	w, h := me.baseGui.MousePosition()
+
+	rootW := me.treeRoot.TK.(*guiWidget)
+	widgets := findByXY(rootW, w, h)
+
+	// search through all the widgets that were below the mouse click
+	var found *guiWidget
+	for _, w := range widgets {
+		// prioritize window buttons. This means if some code covers
+		// up the window widgets, then it will ignore everything else
+		// and allow the user (hopefully) to redraw or switch windows
+		// TODO: display the window widgets on top
+		if w.WidgetType == widget.Window {
+			return w
+		}
+	}
+
+	// return anything else that is interactive
+	for _, w := range widgets {
+		if w.WidgetType == widget.Button {
+			return w
+		}
+		if w.WidgetType == widget.Combobox {
+			return w
+		}
+		if w.WidgetType == widget.Checkbox {
+			return w
+		}
+		w.showWidgetPlacement("findUnderMouse() found something unknown")
+		found = w
+	}
+	// maybe something else was found
+	return found
+}
+
+// find the widget under the mouse click
+func ctrlDown(g *gocui.Gui, v *gocui.View) error {
+	var found *guiWidget
+	// var widgets []*node
+	// var f func (n *node)
+	found = findUnderMouse()
+	if me.ctrlDown == nil {
+		setupCtrlDownWidget()
+
+		var tk *guiWidget
+		tk = me.ctrlDown.TK.(*guiWidget)
+		tk.labelN = found.String()
+		tk.cuiName = "ctrlDown"
+		// me.ctrlDown.parent = me.rootNode
+	}
+	var tk *guiWidget
+	tk = me.ctrlDown.TK.(*guiWidget)
+	if found == nil {
+		found = me.treeRoot.TK.(*guiWidget)
+	}
+	tk.labelN = found.String()
+	newR := found.realGocuiSize()
+	tk.gocuiSize.w0 = newR.w0
+	tk.gocuiSize.h0 = newR.h0
+	tk.gocuiSize.w1 = newR.w1
+	tk.gocuiSize.h1 = newR.h1
+	return nil
+}