GuiButtonExt.java

/*
 * Minecraft Forge
 * Copyright (c) 2016.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation version 2.1
 * of the License.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

package net.minecraftforge.fml.client.config;

import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.GuiButton;

/**
 * This class provides a button that fixes several bugs present in the vanilla GuiButton drawing code.
 * The gist of it is that it allows buttons of any size without gaps in the graphics and with the
 * borders drawn properly. It also prevents button text from extending out of the sides of the button by
 * trimming the end of the string and adding an ellipsis.<br/><br/>
 *
 * The code that handles drawing the button is in GuiUtils.
 *
 * @author bspkrs
 */
public class GuiButtonExt extends GuiButton
{
    public GuiButtonExt(int id, int xPos, int yPos, String displayString)
    {
        super(id, xPos, yPos, displayString);
    }

    public GuiButtonExt(int id, int xPos, int yPos, int width, int height, String displayString)
    {
        super(id, xPos, yPos, width, height, displayString);
    }

    /**
     * Draws this button to the screen.
     */
    @Override
    public void drawButton(Minecraft mc, int mouseX, int mouseY)
    {
        if (this.visible)
        {
            this.hovered = mouseX >= this.xPosition && mouseY >= this.yPosition && mouseX < this.xPosition + this.width && mouseY < this.yPosition + this.height;
            int k = this.getHoverState(this.hovered);
            GuiUtils.drawContinuousTexturedBox(BUTTON_TEXTURES, this.xPosition, this.yPosition, 0, 46 + k * 20, this.width, this.height, 200, 20, 2, 3, 2, 2, this.zLevel);
            this.mouseDragged(mc, mouseX, mouseY);
            int color = 14737632;

            if (packedFGColour != 0)
            {
                color = packedFGColour;
            }
            else if (!this.enabled)
            {
                color = 10526880;
            }
            else if (this.hovered)
            {
                color = 16777120;
            }

            String buttonText = this.displayString;
            int strWidth = mc.fontRendererObj.getStringWidth(buttonText);
            int ellipsisWidth = mc.fontRendererObj.getStringWidth("...");

            if (strWidth > width - 6 && strWidth > ellipsisWidth)
                buttonText = mc.fontRendererObj.trimStringToWidth(buttonText, width - 6 - ellipsisWidth).trim() + "...";

            this.drawCenteredString(mc.fontRendererObj, buttonText, this.xPosition + this.width / 2, this.yPosition + (this.height - 8) / 2, color);
        }
    }
}