qzdoom/wadsrc/static/zscript/menu/textentermenu.txt

// This is only the parts that are needed to make the menu fully work right now. More to come later.
class TextEnterMenu : Menu native
{
	const INPUTGRID_WIDTH = 13;
	const INPUTGRID_HEIGHT = 5;
	
	const Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789+-=.,!?@'\":;[]()<>^#$%&*/_ \b";

	native String mEnterString;
	native int mEnterSize;
	native int mEnterPos;
	native int mSizeMode; // 1: size is length in chars. 2: also check string width
	native bool mInputGridOkay;
	native int InputGridX;
	native int InputGridY;
	native bool AllowColors;
	
	native static TextEnterMenu Open(Menu parent, String text, int maxlen, int sizemode, bool fromcontroller);
	
	
	String GetText()
	{
		return mEnterString;
	}
	
	override bool TranslateKeyboardEvents()
	{
		return mInputGridOkay; 
	}
	
	//=============================================================================
	//
	//
	//
	//=============================================================================

	override void Drawer ()
	{
		mParentMenu.Drawer();
		if (mInputGridOkay)
		{
			String InputGridChars = Chars;
			int cell_width = 18 * CleanXfac;
			int cell_height = 12 * CleanYfac;
			int top_padding = cell_height / 2 - SmallFont.GetHeight() * CleanYfac / 2;

			// Darken the background behind the character grid.
			screen.Dim(0, 0.8, 0, screen.GetHeight() - INPUTGRID_HEIGHT * cell_height, screen.GetWidth(), INPUTGRID_HEIGHT * cell_height);

			if (InputGridX >= 0 && InputGridY >= 0)
			{
				// Highlight the background behind the selected character.
				screen.Dim(Color(255,248,220), 0.6,
					InputGridX * cell_width - INPUTGRID_WIDTH * cell_width / 2 + screen.GetWidth() / 2,
					InputGridY * cell_height - INPUTGRID_HEIGHT * cell_height + screen.GetHeight(),
					cell_width, cell_height);
			}

			for (int y = 0; y < INPUTGRID_HEIGHT; ++y)
			{
				int yy = y * cell_height - INPUTGRID_HEIGHT * cell_height + screen.GetHeight();
				for (int x = 0; x < INPUTGRID_WIDTH; ++x)
				{
					int xx = x * cell_width - INPUTGRID_WIDTH * cell_width / 2 + screen.GetWidth() / 2;
					int ch = InputGridChars.CharCodeAt(y * INPUTGRID_WIDTH + x);
					int width = SmallFont.GetCharWidth(ch);

					// The highlighted character is yellow; the rest are dark gray.
					int colr = (x == InputGridX && y == InputGridY) ? Font.CR_YELLOW : Font.CR_DARKGRAY;
					Color palcolor = (x == InputGridX && y == InputGridY) ? Color(160,  120,   0) : Color(120, 120, 120);

					if (ch > 32)
					{
						// Draw a normal character.
						screen.DrawChar(SmallFont, colr, xx + cell_width/2 - width*CleanXfac/2, yy + top_padding, ch, DTA_CleanNoMove, true);
					}
					else if (ch == 32)
					{
						// Draw the space as a box outline. We also draw it 50% wider than it really is.
						int x1 = xx + cell_width/2 - width * CleanXfac * 3 / 4;
						int x2 = x1 + width * 3 * CleanXfac / 2;
						int y1 = yy + top_padding;
						int y2 = y1 + SmallFont.GetHeight() * CleanYfac;
						screen.Clear(x1, y1, x2, y1+CleanYfac, palcolor);	// top
						screen.Clear(x1, y2, x2, y2+CleanYfac, palcolor);	// bottom
						screen.Clear(x1, y1+CleanYfac, x1+CleanXfac, y2, palcolor);	// left
						screen.Clear(x2-CleanXfac, y1+CleanYfac, x2, y2, palcolor);	// right
					}
					else if (ch == 8 || ch == 0)
					{
						// Draw the backspace and end "characters".
						String str = ch == 8 ? "BS" : "ED";
						screen.DrawText(SmallFont, colr,
							xx + cell_width/2 - SmallFont.StringWidth(str)*CleanXfac/2,
							yy + top_padding, str, DTA_CleanNoMove, true);
					}
				}
			}
		}
		Super.Drawer();
	}
	
}