fgdata/gui/dialogs/property-browser.xml

<?xml version="1.0"?>

<PropertyList>
	<name>property-browser</name>
	<layout>vbox</layout>
	<resizable>true</resizable>
	<default-padding>3</default-padding>

	<group>
		<layout>hbox</layout>
		<default-padding>1</default-padding>

		<button>
			<legend></legend>
			<pref-width>16</pref-width>
			<pref-height>16</pref-height>
			<border>2</border>
		<!-- looks better in anthrax style -->
			<color>
				<red>0.34</red>
				<green>0.33</green>
				<blue>0.35</blue>
			</color>
		<!-- -->
			<binding>
				<command>nasal</command>
				<script>clone(dir)</script>
			</binding>
		</button>

		<empty><whatever/></empty>

		<text>
			<label>/</label>
			<property>/sim/gui/dialogs/property-browser/title</property>
			<live>true</live>
		</text>

		<empty><stretch>true</stretch></empty>

		<button>
			<legend></legend>
			<key>Esc</key>
			<pref-width>16</pref-width>
			<pref-height>16</pref-height>
			<border>2</border>
			<binding>
				<command>dialog-close</command>
			</binding>
		</button>
	</group>

	<hrule/>

	<property-list>
		<name>property-list</name>
		<pref-height>500</pref-height>
		<halign>fill</halign>
		<valign>fill</valign>
		<stretch>true</stretch>
		<property>/sim/gui/dialogs/property-browser/list</property>
		<binding>
			<command>dialog-apply</command>
			<object-name>property-list</object-name>
		</binding>
		<binding>
			<command>nasal</command>
			<script>select()</script>
		</binding>
	</property-list>

	<group>
		<layout>hbox</layout>
		<default-padding>2</default-padding>

		<empty><whatever/></empty>

		<text>
			<label>--</label>
			<live>true</live>
			<halign>fill</halign>
			<stretch>true</stretch>
			<property>/sim/gui/dialogs/property-browser/label</property>
			<pref-width>170</pref-width>
		</text>

		<input>
			<name>input</name>
			<halign>fill</halign>
			<stretch>true</stretch>
			<pref-width>170</pref-width>
			<property>/sim/gui/dialogs/property-browser/input</property>
		</input>

		<button>
			<legend>Set</legend>
			<pref-width>50</pref-width>
			<default>true</default>
			<binding>
				<command>dialog-apply</command>
				<object-name>input</object-name>
			</binding>
			<binding>
				<command>nasal</command>
				<script>set()</script>
			</binding>
		</button>
	</group>

	<nasal>
		<open>
			var self = cmdarg();
			var dlgname = self.getNode("name").getValue();
			var dlg = props.globals.getNode("/sim/gui/dialogs/" ~ dlgname, 1);
			var title = dlg.getNode("title", 1);
			var label = dlg.getNode("label", 1);
			var input = dlg.getNode("input", 1);
			var list = dlg.getNode("list", 1);
			var node = nil;         # selected node entry (props.Node)
			var dir = nil;          # current directory (string)
			var update_interval = 2;
			var root_title = "Internal Properties";
			var no_selection = "[none]";

			var update = func(w) {
				self.setValues({ "dialog-name": dlgname, "object-name": w });
				fgcommand("dialog-update", self);
			}

			var squeeze = func(s, n) {
				if (n >= size(s) or 7 > n )
					return s;

				var l = substr(s, 0, (n - 3) / 2);
				var r = substr(s, size(s) + size(l) + 3 - n);
				return l ~ "..." ~ r;
			}

			var select = func {
				var lst = list.getValue();
				node = props.globals.getNode(lst);
				if (node == nil)
					node = props.globals;

				setprop("/sim/gui/dialogs/property-browser/selected", node.getPath());
				if (node.getAttribute("children")) {
					dir = node.getPath();
					title.setValue(node.getPath() == "" ? root_title : lst);
					node = nil;
					label.setValue(no_selection);
					input.setValue("");
				} else {
					var name = node.getName();
					var index = node.getIndex();
					var type = node.getType();
					if (index)
						name ~= "[" ~ index ~ "]";

					var value = nil;
					if (type == "BOOL") {
						value = node.getBoolValue() ? "true" : "false";
						title.setValue("Hint: Ctrl-click toggles bool values");
						settimer(func title.setValue(dir), 5, 1);
					} elsif (type == "STRING") {
						value = node.getValue();
					} elsif (type == "NONE") {
						value = "";
					} elsif (type != "ALIAS") {
						value = node.getValue() ~ "";
					}
					label.setValue(squeeze(name, 30));
					input.setValue(value);
				}
				update("input");
			}

			var set = func {
				if (node != nil)
					node.setValue(input.getValue());
			}

			var clone = func(startdir) {
				var base = props.globals.getNode("/sim/gui/dialogs", 1);
				var name = "property-browser-";
				for (var i = 1; 1; i += 1)
					if (base.getNode(name ~ i, 0) == nil)
						break;
				base = base.getNode(name ~ i, 1).getPath();
				setprop(base ~ "/last", startdir);
				self.setValues({
					"name": name ~ i,
					"dialog-name": name ~ i,
					"group[0]/text/property": base ~ "/title",
					"property-list/property": base ~ "/list",
					"group[1]/text/property": base ~ "/label",
					"group[1]/input/property": base ~ "/input",
				});
				fgcommand("dialog-new", self);
				fgcommand("dialog-show", self);

				var originalPath = '/sim/gui/dialogs/property-browser';
				# reset the values, so we don't use incorrect paths
				# when the last browser is closed and then re-opened
				# bug: https://sourceforge.net/p/flightgear/codetickets/2044/
				self.setValues({
					"name": "property-browser",
					"dialog-name": "property-browser",
					"group[0]/text/property": originalPath ~ "/title",
					"property-list/property": originalPath ~ "/list",
					"group[1]/text/property": originalPath ~ "/label",
					"group[1]/input/property": originalPath ~ "/input",
				});
			}

			var auto_update = func {
				list.setValue(dir);
				update("property-list");
				if (update_interval)
					settimer(auto_update, update_interval, 1);
			}

			dir = dlg.getNode("last") != nil ? dlg.getNode("last").getValue() : "/";
			list.setValue(dir);
			select();
			auto_update();
		</open>

		<close>
			update_interval = 0;
			if (find("property-browser-", dlgname) >= 0)
				dlg.getParent().removeChildren(dlgname);
			else
				dlg.getNode("last", 1).setValue(dir);
		</close>
	</nasal>
</PropertyList>