type value any

move the common code here. add docs

Makefile

@@ -8,8 +8,8 @@ all:
 
 redomod:
 	rm -f go.*
-	go mod init
+	GO111MODULE= go mod init
-	go mod tidy
+	GO111MODULE= go mod tidy
 
 # sync repo to the github backup
 # git remote add github git@github.com:wit-go/widget.git

action.go

@@ -0,0 +1,104 @@
+package widget
+
+type Action struct {
+	ActionType ActionType
+	WidgetType WidgetType
+
+	WidgetId int
+	ParentId int
+
+	// Text string  // what is visable to the user
+	ProgName string  // a name useful for programming
+
+	// most primitive widgets just store a single thing
+	Value	any
+
+	// how to arrange widgets
+	Direction Orientation
+
+	// This is used for things like a slider(0,100)
+	X      int
+	Y      int
+
+	// This is for the grid size & widget position
+	W      int
+	H      int
+	AtW    int
+	AtH    int
+
+	// Put space around elements to improve look & feel
+	Margin	bool
+
+	// Make widgets fill up the space available
+	Expand	bool
+}
+
+type ActionType int // Add, SetText, Click, Hide, Append, Delete, etc
+
+const (
+	Add ActionType = iota
+	Delete
+	Get
+	Set
+	GetText
+	SetText
+	AddText
+	Show
+	Hide
+	Enable
+	Disable
+	Margin
+	Unmargin
+	Pad
+	Unpad
+	Append
+	Move
+	Dump
+	User // the user did something (mouse, keyboard, etc)
+	InitToolkit // initializes the toolkit
+	CloseToolkit // closes the toolkit
+	UserQuit // the user closed the GUI
+	EnableDebug // open the debugging window
+)
+
+func (s ActionType) String() string {
+	switch s {
+	case Add:
+		return "Add"
+	case Delete:
+		return "Delete"
+	case Get:
+		return "Get"
+	case Set:
+		return "Set"
+	case GetText:
+		return "GetText"
+	case SetText:
+		return "SetText"
+	case AddText:
+		return "AddText"
+	case Show:
+		return "Show"
+	case Hide:
+		return "Hide"
+	case Enable:
+		return "Enable"
+	case Disable:
+		return "Disable"
+	case Margin:
+		return "Margin"
+	case Unmargin:
+		return "Unmargin"
+	case Pad:
+		return "Pad"
+	case Unpad:
+		return "Unpad"
+	case Append:
+		return "Append"
+	case Move:
+		return "Move"
+	case Dump:
+		return "Dump"
+	}
+	return "ActionType.String() Error"
+}

doc.go

@@ -0,0 +1,14 @@
+package widget
+
+// passes information between the gui package and the toolkit plugins
+//
+// This is the only thing that is passed between the toolkit plugin
+//
+// what names should be used? This is not part of [[Graphical Widget]]
+// Event() seems like a good name.
+//	Event is used too much: web dev, cloud, etc
+//	I'm using "Action". Maybe it should really be
+//	"Interaction" as per wikipedia [[User interface]]
+//
+// TODO: convert this to a protobuf (?)
+//

geom.go

@@ -0,0 +1,64 @@
+package widget
+
+/*
+	2D geometry values
+
+	There are lots of issues when supporting multiple toolkit plugin
+	geometries. The geometries vary widely especially between the
+	graphical displays and the serial console ones.
+
+	To simplyfy this, we stick to using the concepts:
+
+	------------------------------        ^
+	|             top             |       |
+	|                             |       |
+	|  left                right  |    height
+	|                             |       |
+	|            bottom           |       |
+	------------------------------        v
+
+	<----------- width ---------->
+
+	This way, width & height are always positive numbers.
+
+	The qustion of (top,bottom) & (left,right) becomes problematic.
+
+	In almost every toolkit, right > left. However, top & bottom
+	vary and a choice can not be made easily. Luckily, we maybe do
+	not have to make that decision here and can pass that determination
+	to the toolkits. So, we use excusively:
+
+	geom(left, right, top, bottom)
+	size(width, height)
+*/
+
+type Geom struct {
+	Left any
+	Right any
+	Top any
+	Bottom any
+}
+
+type Size struct {
+	Width any
+	Height any
+}
+
+type Orientation int // Add, SetText, Click, Hide, Append, Delete, etc
+
+const (
+	Horizontal Orientation = iota
+	Vertical
+)
+
+func (s Orientation) String() string {
+	switch s {
+	case Horizontal:
+		return "Horizontal"
+	case Vertical:
+		return "Vertical"
+	default:
+		return "Horizontal"
+	}
+	return "Horizontal"
+}

grid.go

@@ -0,0 +1,41 @@
+package widget
+
+// This is how grids are handled. On the application side,
+// things are mostly handled this way. Web browsers, etc
+//
+// On the toolkit side, this must be translated into the display
+// code. This is particularly complicated with ncurses but once
+// done in the toolkits, bears fruit in the application code simplicity
+
+// NOTE: X numbers horizontally, Y is numbered down. Like in mathematics, EXCEPT Y IS DOWN
+// this is the only sensible way. It's way too confusing to use negative numbers for Y.
+// This is an attempt to make it simple for people to program against this code,
+// then we hide these implementation details in the toolkit plugins
+
+// Grid numbering examples (H) or (W,H)
+// -----------------------
+// -- (1) -- (2) -- (3) -- (X)
+// -----------------------
+//
+//    (Y)
+// ---------
+// -- (1) --
+// -- (2) --
+// ---------
+//
+//    (X,Y)
+// --------------------------------------
+// -- (1,1) -- (2,1) -- (3,1) -- (4,1) --
+// -- (1,2) -- (2,2) -- (3,2) --       --
+// -- (1,3) --       -- (3,3) -- (4,3) --
+// --------------------------------------
+
+type GridSize struct {
+	Width int
+	Height int
+}
+
+type GridOffset struct {
+	X int
+	Y int
+}

reflect.go

@@ -0,0 +1,96 @@
+package widget
+
+import (
+	"reflect"
+	"strconv"
+)
+
+func GetString(A any) string {
+	if A == nil {
+		// log.Warn("getString() got nil")
+		return ""
+	}
+	var k reflect.Kind
+	k = reflect.TypeOf(A).Kind()
+
+	switch k {
+	case reflect.Int:
+		var i int
+		i = A.(int)
+		return strconv.Itoa(i)
+	case reflect.String:
+		return A.(string)
+	case reflect.Bool:
+		if A.(bool) == true {
+			return "true"
+		} else {
+			return "false"
+		}
+	default:
+		// log.Warn("getString uknown kind", k, "value =", A)
+		return ""
+	}
+	return ""
+}
+
+// work like unix os.Exec() ? everything other than 0 is false
+func GetBool(A any) bool {
+	if A == nil {
+		// log.Warn("getBool() got nil")
+		return false
+	}
+	var k reflect.Kind
+	k = reflect.TypeOf(A).Kind()
+
+	switch k {
+	case reflect.Int:
+		var i int
+		i = A.(int)
+		if i == 0 {
+			return true
+		} else {
+			return false
+		}
+	case reflect.String:
+		if A.(string) == "true" {
+			return true
+		} else {
+			return false
+		}
+	case reflect.Bool:
+		return A.(bool)
+	default:
+		// log.Warn("getString uknown kind", k, "value =", A)
+		return false
+	}
+	return false
+}
+
+// work like unix? everything other than 0 is false
+func GetInt(A any) int {
+	if A == nil {
+		// log.Warn("getBool() got nil")
+		return -1
+	}
+	var k reflect.Kind
+	k = reflect.TypeOf(A).Kind()
+
+	switch k {
+	case reflect.Int:
+		return A.(int)
+	case reflect.String:
+		tmp := A.(string)
+		i, _ := strconv.Atoi(tmp)
+		return i
+	case reflect.Bool:
+		if A.(bool) {
+			return 0
+		} else {
+			return -1
+		}
+	default:
+		// log.Warn("getString uknown kind", k, "value =", A)
+		return -1
+	}
+	return -1
+}

widget.go

@@ -5,7 +5,7 @@ package widget
 // This is the only thing that is passed between the toolkit plugin
 //
 // what names should be used? This is not part of [[Graphical Widget]]
-// Event() seems like a good name. 
+// Event() seems like a good name.
 //	Event is used too much: web dev, cloud, etc
 //	I'm using "Action". Maybe it should really be
 //	"Interaction" as per wikipedia [[User interface]]
@@ -14,42 +14,6 @@ package widget
 //
 
 type WidgetType int // Button, Menu, Checkbox, etc.
-type ActionType int // Add, SetText, Click, Hide, Append, Delete, etc
-
-type Action struct {
-	ActionType ActionType
-	WidgetType WidgetType
-
-	WidgetId int
-	ParentId int
-
-	Text string  // what is visable to the user
-	Name string  // a name useful for programming
-
-	// This is how the values are passed back and forth
-	// values from things like checkboxes & dropdown's
-	B	bool
-	I	int
-	S	string
-	A	any // switch to this or deprecate this? pros/cons?
-
-	// This is used for things like a slider(0,100)
-	X      int
-	Y      int
-
-	// This is for the grid size & widget position
-	W      int
-	H      int
-	AtW    int
-	AtH    int
-
-	// Put space around elements to improve look & feel
-	Margin	bool
-
-	// Make widgets fill up the space available
-	Expand	bool
-
-}
 
 const (
 	Unknown WidgetType = iota
@@ -79,32 +43,6 @@ const (
 	Stdout // can be used to capture and display log output
 )
 
-const (
-	Add ActionType = iota
-	Delete
-	Get
-	Set
-	GetText
-	SetText
-	AddText
-	Show
-	Hide
-	Enable
-	Disable
-	Margin
-	Unmargin
-	Pad
-	Unpad
-	Append
-	Move
-	Dump
-	User // the user did something (mouse, keyboard, etc)
-	InitToolkit // initializes the toolkit
-	CloseToolkit // closes the toolkit
-	UserQuit // the user closed the GUI
-	EnableDebug // open the debugging window
-)
-
 func (s WidgetType) String() string {
 	switch s {
 	case Root:
@@ -160,45 +98,3 @@ func (s WidgetType) String() string {
 	}
 	return "WidgetType.String() Error"
 }
-
-func (s ActionType) String() string {
-	switch s {
-	case Add:
-		return "Add"
-	case Delete:
-		return "Delete"
-	case Get:
-		return "Get"
-	case Set:
-		return "Set"
-	case GetText:
-		return "GetText"
-	case SetText:
-		return "SetText"
-	case AddText:
-		return "AddText"
-	case Show:
-		return "Show"
-	case Hide:
-		return "Hide"
-	case Enable:
-		return "Enable"
-	case Disable:
-		return "Disable"
-	case Margin:
-		return "Margin"
-	case Unmargin:
-		return "Unmargin"
-	case Pad:
-		return "Pad"
-	case Unpad:
-		return "Unpad"
-	case Append:
-		return "Append"
-	case Move:
-		return "Move"
-	case Dump:
-		return "Dump"
-	}
-	return "ActionType.String() Error"
-}