"use strict";
/*
*  Copyright (C) 1998-2017 by Northwoods Software Corporation. All Rights Reserved.
*/

import * as go from "../release/go";

// These are the definitions for all of the predefined buttons.
// You do not need to load this file in order to use buttons.

// A "Button" is a Panel that has a Shape surrounding some content
// and that has mouseEnter/mouseLeave behavior to highlight the button.
// The content of the button, whether a TextBlock or a Picture or a complicated Panel,
// must be supplied by the caller.
// The caller must also provide a click event handler.

// Typical usage:
//    $("Button",
//      $(go.TextBlock, "Click me!"),  // the content is just the text label
//      { click: function(e, obj) { alert("I was clicked"); } }
//    )

// Note that a button click event handler is not invoked upon a click if isEnabledObject() returns false.

go.GraphObject.defineBuilder("Button", function (args) {
	// default brushes for "Button" shape
	var buttonFillNormal = go.GraphObject.make(go.Brush, "Linear", { 0: "white", 1: "lightgray" });
	var buttonStrokeNormal = "gray";

	var buttonFillOver = go.GraphObject.make(go.Brush, "Linear", { 0: "white", 1: "dodgerblue" });
	var buttonStrokeOver = "blue";

	var buttonFillDisabled = "darkgray";

	// offset identical to that needed to match the original RoundedRectangle figure, to keep the same size
	var offset = 2.761423749153968;

	var button = /** @type {Panel} */ (
		go.GraphObject.make(go.Panel, "Auto",
			{
				isActionable: true,  // needed so that the ActionTool intercepts mouse events
				enabledChanged: function (button: go.Panel, enabled: boolean) {
					var shape = button.findObject("ButtonBorder") as go.Shape;
					if (shape !== null) {
						shape.fill = enabled ? (<any>button)["_buttonFillNormal"] : (<any>button)["_buttonFillDisabled"];
					}
				},
				// save these values for the mouseEnter and mouseLeave event handlers
				"_buttonFillNormal": buttonFillNormal,
				"_buttonStrokeNormal": buttonStrokeNormal,
				"_buttonFillOver": buttonFillOver,
				"_buttonStrokeOver": buttonStrokeOver,
				"_buttonFillDisabled": buttonFillDisabled
			},
			go.GraphObject.make(go.Shape,  // the border
				{
					name: "ButtonBorder",
					figure: "Rectangle",
					spot1: new go.Spot(0, 0, offset, offset),
					spot2: new go.Spot(1, 1, -offset, -offset),
					fill: buttonFillNormal,
					stroke: buttonStrokeNormal
				})
		)
	);

	// There's no GraphObject inside the button shape -- it must be added as part of the button definition.
	// This way the object could be a TextBlock or a Shape or a Picture or arbitrarily complex Panel.

	// mouse-over behavior
	button.mouseEnter = (e: go.InputEvent, button: go.Panel, prev: go.Panel) => {
		var shape = button.findObject("ButtonBorder");  // the border Shape
		if (shape instanceof go.Shape) {
			var brush = (<any>button)["_buttonFillOver"];
			(<any>button)["_buttonFillNormal"] = shape.fill;
			shape.fill = brush;
			brush = (<any>button)["_buttonStrokeOver"];
			(<any>button)["_buttonStrokeNormal"] = shape.stroke;
			shape.stroke = brush;
		}
	};

	button.mouseLeave = (e: go.InputEvent, button: go.Panel, prev: go.Panel) => {
		var shape = button.findObject("ButtonBorder");  // the border Shape
		if (shape instanceof go.Shape) {
			shape.fill = (<any>button)["_buttonFillNormal"];
			shape.stroke = (<any>button)["_buttonStrokeNormal"];
		}
	};

	return button;
});


// This is a complete Button that you can have in a Node template
// to allow the user to collapse/expand the subtree beginning at that Node.

// Typical usage within a Node template:
//    $("TreeExpanderButton")

go.GraphObject.defineBuilder("TreeExpanderButton", (args) => {
	var button = /** @type {Panel} */ (
		go.GraphObject.make("Button",
			{ // set these values for the isTreeExpanded binding conversion
				"_treeExpandedFigure": "MinusLine",
				"_treeCollapsedFigure": "PlusLine"
			},
			go.GraphObject.make(go.Shape,  // the icon
				{
					name: "ButtonIcon",
					figure: "MinusLine",  // default value for isTreeExpanded is true
					desiredSize: new go.Size(6, 6)
				},
				// bind the Shape.figure to the Node.isTreeExpanded value using this converter:
				new go.Binding("figure", "isTreeExpanded",
					function (exp, shape) {
						var but = shape.panel;
						return exp ? (<any>but)["_treeExpandedFigure"] : (<any>but)["_treeCollapsedFigure"];
					})
					.ofObject()),
			// assume initially not visible because there are no links coming out
			{ visible: false },
			// bind the button visibility to whether it's not a leaf node
			new go.Binding("visible", "isTreeLeaf",
				function (leaf) { return !leaf; })
				.ofObject())
	);

	// tree expand/collapse behavior
	button.click = (e: go.InputEvent, button: go.Node) => {
		var node = button.part;
		if (node instanceof go.Adornment) node = node.adornedPart;
		if (!(node instanceof go.Node)) return;
		var diagram = node.diagram;
		if (diagram === null) return;
		var cmd = diagram.commandHandler;
		if (node.isTreeExpanded) {
			if (!cmd.canCollapseTree(node)) return;
		} else {
			if (!cmd.canExpandTree(node)) return;
		}
		e.handled = true;
		if (node.isTreeExpanded) {
			cmd.collapseTree(node);
		} else {
			cmd.expandTree(node);
		}
	};

	return button;
});


// This is a complete Button that you can have in a Group template
// to allow the user to collapse/expand the subgraph that the Group holds.

// Typical usage within a Group template:
//    $("SubGraphExpanderButton")

go.GraphObject.defineBuilder("SubGraphExpanderButton", (args) => {
	var button = /** @type {Panel} */ (
		go.GraphObject.make("Button",
			{ // set these values for the isSubGraphExpanded binding conversion
				"_subGraphExpandedFigure": "MinusLine",
				"_subGraphCollapsedFigure": "PlusLine"
			},
			go.GraphObject.make(go.Shape,  // the icon
				{
					name: "ButtonIcon",
					figure: "MinusLine",  // default value for isSubGraphExpanded is true
					desiredSize: new go.Size(6, 6)
				},
				// bind the Shape.figure to the Group.isSubGraphExpanded value using this converter:
				new go.Binding("figure", "isSubGraphExpanded",
					function (exp, shape) {
						var but = shape.panel;
						return exp ? (<any>but)["_subGraphExpandedFigure"] : (<any>but)["_subGraphCollapsedFigure"];
					})
					.ofObject()))
	);

	// subgraph expand/collapse behavior
	button.click = (e: go.InputEvent, button: go.Panel): go.Panel => {
		var group = button.part;
		if (group instanceof go.Adornment) group = group.adornedPart;
		if (!(group instanceof go.Group)) return;
		var diagram = group.diagram;
		if (diagram === null) return;
		var cmd = diagram.commandHandler;
		if (group.isSubGraphExpanded) {
			if (!cmd.canCollapseSubGraph(group)) return;
		} else {
			if (!cmd.canExpandSubGraph(group)) return;
		}
		e.handled = true;
		if (group.isSubGraphExpanded) {
			cmd.collapseSubGraph(group);
		} else {
			cmd.expandSubGraph(group);
		}
	};

	return button;
});


// This just holds the "ButtonBorder" Shape that acts as the border
// around the button contents, which must be supplied by the caller.
// The button contents are usually a TextBlock or Panel consisting of a Shape and a TextBlock.

// Typical usage within an Adornment that is either a GraphObject.contextMenu or a Diagram.contextMenu:
// $("ContextMenuButton",
//   $(go.TextBlock, text),
//   { click: function(e, obj) { alert("Command for " + obj.part.adornedPart); } },
//   new go.Binding("visible", "", function(data) { return ...OK to perform Command...; })
// )

go.GraphObject.defineBuilder("ContextMenuButton", (args): go.Panel => {
	var button = /** @type {Panel} */ (go.GraphObject.make("Button"));
	button.stretch = go.GraphObject.Horizontal;
	var border = button.findObject("ButtonBorder");
	if (border instanceof go.Shape) {
		border.figure = "Rectangle";
		border.spot1 = new go.Spot(0, 0, 2, 3);
		border.spot2 = new go.Spot(1, 1, -2, -2);
	}
	return button;
});


// This button is used to toggle the visibility of a GraphObject named
// by the second argument to GraphObject.make.  If the second argument is not present
// or if it is not a string, this assumes that the element name is "COLLAPSIBLE".
// You can only control the visibility of one element in a Part at a time,
// although that element might be an arbitrarily complex Panel.

// Typical usage:
//   $(go.Panel, . . .,
//     $("PanelExpanderButton", "COLLAPSIBLE"),
//     . . .,
//       $(go.Panel, . . .,
//         { name: "COLLAPSIBLE" },
//         . . . stuff to be hidden or shown as the PanelExpanderButton is clicked . . .
//       ),
//     . . .
//   )

go.GraphObject.defineBuilder("PanelExpanderButton", (args) => {
	var eltname: string = /** @type {string} */ (go.GraphObject.takeBuilderArgument(args, "COLLAPSIBLE"));

	var button: go.Panel = /** @type {Panel} */ (
		go.GraphObject.make("Button",
			{ // set these values for the visible binding conversion
				"_buttonExpandedFigure": "TriangleUp",
				"_buttonCollapsedFigure": "TriangleDown"
			},
			go.GraphObject.make(go.Shape, "TriangleUp",
				{ name: "ButtonIcon", desiredSize: new go.Size(6, 4) },
				new go.Binding("figure", "visible",
					function (vis) { return vis ? (<any>button)["_buttonExpandedFigure"] : (<any>button)["_buttonCollapsedFigure"]; })
					.ofObject(eltname)))
	);

	var border = button.findObject("ButtonBorder");
	if (border instanceof go.Shape) {
		border.stroke = null;
		border.fill = "transparent";
	}

	button.click = (e: go.InputEvent, button: go.Node): go.Panel => {
		var diagram = button.diagram;
		if (diagram === null) return;
		if (diagram.isReadOnly) return;
		var elt = button.findTemplateBinder();
		if (elt === null) elt = button.part;
		if (elt !== null) {
			var pan = elt.findObject(eltname);
			if (pan !== null) {
				diagram.startTransaction('Collapse/Expand Panel');
				pan.visible = !pan.visible;
				diagram.commitTransaction('Collapse/Expand Panel');
			}
		}
	}

	return button;
});


// Define a common checkbox button; the first argument is the name of the data property
// to which the state of this checkbox is data bound.  If the first argument is not a string,
// it raises an error.  If no data binding of the checked state is desired,
// pass an empty string as the first argument.

// Examples:
// $("CheckBoxButton", "dataPropertyName", ...)
// or:
// $("CheckBoxButton", "", { "_doClick": function(e, obj) { alert("clicked!"); } })

go.GraphObject.defineBuilder("CheckBoxButton", (args): go.Panel => {
	// process the one required string argument for this kind of button
	var propname = /** @type {string} */ (go.GraphObject.takeBuilderArgument(args));

	var button = /** @type {Panel} */ (
		go.GraphObject.make("Button",
			{
				"ButtonBorder.fill": "white",
				"ButtonBorder.stroke": "gray",
				width: 14,
				height: 14
			},
			go.GraphObject.make(go.Shape,
				{
					name: "ButtonIcon",
					geometryString: "M0 4 L3 9 9 0",  // a "check" mark
					strokeWidth: 2,
					stretch: go.GraphObject.Fill,  // this Shape expands to fill the Button
					geometryStretch: go.GraphObject.Uniform,  // the check mark fills the Shape without distortion
					visible: false  // visible set to false: not checked, unless data.PROPNAME is true
				},
				// create a data Binding only if PROPNAME is supplied and not the empty string
				(propname !== "" ? new go.Binding("visible", propname).makeTwoWay() : []))
		)
	);

	button.click = (e: go.InputEvent, button: go.Node) => {
		var diagram = e.diagram;
		if (diagram === null || diagram.isReadOnly) return;
		if (propname !== "" && diagram.model.isReadOnly) return;
		e.handled = true;
		var shape = button.findObject("ButtonIcon");
		diagram.startTransaction("checkbox");
		shape.visible = !shape.visible;  // this toggles data.checked due to TwoWay Binding
		// support extra side-effects without clobbering the click event handler:
		if (typeof (<any>button)["_doClick"] === "function") (<any>button)["_doClick"](e, button);
		diagram.commitTransaction("checkbox");
	};

	return button;
});


// This defines a whole check-box -- including both a "CheckBoxButton" and whatever you want as the check box label.
// Note that mouseEnter/mouseLeave/click events apply to everything in the panel, not just in the "CheckBoxButton".

// Examples:
// $("CheckBox", "aBooleanDataProperty", $(go.TextBlock, "the checkbox label"))
// or
// $("CheckBox", "someProperty", $(go.TextBlock, "A choice"),
//   { "_doClick": function(e, obj) { ... perform extra side-effects ... } })

go.GraphObject.defineBuilder("CheckBox", (args): go.Panel => {
	// process the one required string argument for this kind of button
	var propname = /** @type {string} */ (go.GraphObject.takeBuilderArgument(args));

	var button = /** @type {Panel} */ (
		go.GraphObject.make("CheckBoxButton", propname,  // bound to this data property
			{
				name: "Button",
				margin: new go.Margin(0, 1, 0, 0)
			})
	);
	var box = /** @type {Panel} */ (
		go.GraphObject.make(go.Panel, "Horizontal",
			button,
			{
				isActionable: true,
				margin: 1,
				// transfer CheckBoxButton properties over to this new CheckBox panel
				"_buttonFillNormal": button["_buttonFillNormal"],
				"_buttonStrokeNormal": button["_buttonStrokeNormal"],
				"_buttonFillOver": button["_buttonFillOver"],
				"_buttonStrokeOver": button["_buttonStrokeOver"],
				"_buttonFillDisabled": button["_buttonFillDisabled"],
				mouseEnter: button.mouseEnter,
				mouseLeave: button.mouseLeave,
				click: button.click,
				// also save original Button behavior, for potential use in a Panel.click event handler
				"_buttonClick": button.click
			}
		)
	);
	// avoid potentially conflicting event handlers on the "CheckBoxButton"
	button.mouseEnter = null;
	button.mouseLeave = null;
	button.click = null;
	return box;
});