// The font used for displaying text
declare global MyFont font;

// The X and Y position of a click
declare global PosX int;
declare global PosY int;

// The pen for the grid
declare global GridPen pen;

// ************************************************************************************************************
// Called once when the plugin is started. Do one time setup here.
// ************************************************************************************************************

function Init()
{
	createfont(MyFont, "Arial", 12);
	createpen(GridPen, 0, 2, RGB(255, 255, 255));
}

// ************************************************************************************************************
// The plugin must draw all output here ONLY. This is the only valid drawing function.
// ************************************************************************************************************

function Render()
{
	int iWidth = getpanelwidth();
	int iHeight = getpanelheight();

	// Set the number of pixels in from the left of the display panel the grid should be at
	int iGridTopX = 10;
	int iGridWidth = iWidth - iGridTopX - 10;

	// The grid should be 1/4 of the way from the top of the display panel, and take up half the
	// total height of the panel.
	int iGridTopY = iHeight / 4;
	int iGridHeight = iHeight / 2;

	selectpen(GridPen);

	// First draw the vertical lines at 1/3 and 2/3 of the grid width
	int iGridThirdW = iGridWidth / 3;
	drawline(iGridTopX + iGridThirdW, iGridTopY, iGridTopX + iGridThirdW, iGridTopY + iGridHeight);
	drawline(iGridTopX + (iGridThirdW * 2), iGridTopY, iGridTopX + (iGridThirdW * 2), iGridTopY + iGridHeight);

	// Next draw the horizontal lines at 1/3 and 2/3 of the grid height
	int iGridThirdH = iGridHeight / 3;
	drawline(iGridTopX, iGridTopY + iGridThirdH, iGridTopX + iGridWidth, iGridTopY + iGridThirdH);
	drawline(iGridTopX, iGridTopY + (iGridThirdH * 2), iGridTopX + iGridWidth, iGridTopY + (iGridThirdH * 2));
}

// ************************************************************************************************************
// Called when left mouse button is released. Params give X,Y pos of cursor at release.
// ************************************************************************************************************

function OnMouseLButtonUp(int iX, int iY)
{
	// Store the click position for use in the Render handler
	PosX = iX;
	PosY = iY;
	
	// Tell Brass to redraw our panel immediately
	redraw();
}