// A TextualZoomControl is a GControl that displays textual "Zoom In"
// and "Zoom Out" buttons (as opposed to the iconic buttons used in
// Google Maps).

function TextualZoomControl() {}
TextualZoomControl.prototype = new GControl();

// Creates a one DIV for each of the buttons and places them in a container
// DIV which is returned as our control element. We add the control to
// to the map container and return the element for the map class to
// position properly.
TextualZoomControl.prototype.initialize = function (map)
{
	var container = document.createElement("div");

	var zoomInDiv = document.createElement("div");
	zoomInDiv.id = 'show_hide_lake_columbia';
	this.setButtonStyle_(zoomInDiv);
	container.appendChild(zoomInDiv);
	zoomInDiv.appendChild(document.createTextNode("Hide Lake Columbia"));
	GEvent.addDomListener(zoomInDiv, "click", function ()
	{
		showHide(myMap.lakeColumbia,"show_hide_lake_columbia");
	});

	var zoomOutDiv = document.createElement("div");
	zoomOutDiv.id = 'show_hide_PMF';
	this.setButtonStyle_(zoomOutDiv);
	container.appendChild(zoomOutDiv);
	zoomOutDiv.appendChild(document.createTextNode("Show Probable Maximum Flood"));
	GEvent.addDomListener(zoomOutDiv, "click", function ()
	{
		showHide(myMap.lakeColumbiaPMF,"show_hide_PMF");
	});

	map.getContainer().appendChild(container);
	return container;
}

// By default, the control will appear in the top left corner of the
// map with 7 pixels of padding.
TextualZoomControl.prototype.getDefaultPosition = function ()
{
	return new GControlPosition(G_ANCHOR_TOP_RIGHT, new GSize(7, 32));
}

// Sets the proper CSS for the given button element.
TextualZoomControl.prototype.setButtonStyle_ = function (button)
{
	button.style.textDecoration = "none";
	button.style.color = "#000";
	button.style.backgroundColor = "white";
	button.style.font = "12px Arial";
	button.style.border = "1px solid black";
	button.style.padding = "2px";
	button.style.marginBottom = "3px";
	button.style.textAlign = "center";
	button.style.width = "193px";
	button.style.cursor = "pointer";
}