nocui: a template for porting new toolkits

Signed-off-by: Jeff Carr <[email protected]>

1 files changed, 79 insertions, 0 deletions

diff --git a/toolkit/nocui/common.go b/toolkit/nocui/common.go
new file mode 100644
index 0000000..2e0ffdc
--- /dev/null
+++ b/toolkit/nocui/common.go
@@ -0,0 +1,79 @@
+package main
+
+import (
+	"git.wit.org/wit/gui/toolkit"
+)
+
+// searches the binary tree for a WidgetId
+func (n *node) findWidgetId(id int) *node {
+	if (n == nil) {
+		return nil
+	}
+
+	if n.WidgetId == id {
+		return n
+	}
+
+	for _, child := range n.children {
+		newN := child.findWidgetId(id)
+		if (newN != nil) {
+			return newN
+		}
+	}
+	return nil
+}
+
+func addWidget(a *toolkit.Action) *node {
+	n := new(node)
+	n.WidgetType = a.WidgetType
+	n.WidgetId = a.WidgetId
+	n.ParentId = a.ParentId
+
+	// copy the data from the action message
+	n.Name = a.Name
+	n.Text = a.Text
+	n.I = a.I
+	n.S = a.S
+	n.B = a.B
+	n.X = a.X
+	n.Y = a.Y
+
+	// store the internal toolkit information
+	n.tk = new(nocuiT)
+
+	if (a.WidgetType == toolkit.Root) {
+		log(logInfo, "addWidget() Root")
+		return n
+	}
+
+	if (rootNode.findWidgetId(a.WidgetId) != nil) {
+		log(logError, "addWidget() WidgetId already exists", a.WidgetId)
+		return rootNode.findWidgetId(a.WidgetId)
+	}
+
+	// add this new widget on the binary tree
+	n.parent = rootNode.findWidgetId(a.ParentId)
+	if n.parent != nil {
+		n.parent.children = append(n.parent.children, n)
+	}
+	return n
+}
+
+func (n *node) doUserEvent() {
+	if (callback == nil) {
+		log(logError, "doUserEvent() callback == nil", n.WidgetId)
+		return
+	}
+	var a toolkit.Action
+	a.WidgetId = n.WidgetId
+	a.Name = n.Name
+	a.Text = n.Text
+	a.S = n.S
+	a.I = n.I
+	a.B = n.B
+	a.ActionType = toolkit.User
+	log(logInfo, "doUserEvent() START: send a user event to the callback channel")
+	callback <- a
+	log(logInfo, "doUserEvent() END:   sent a user event to the callback channel")
+	return
+}