com.todoroo.zxzx.general.SimpleButton.java Source code

Introduction

Here is the source code for com.todoroo.zxzx.general.SimpleButton.java

Source

/*
 * Copyright 2011 Rod Hyde (rod@badlydrawngames.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS"
 * BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */

package com.todoroo.zxzx.general;

import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.BitmapFont.HAlignment;
import com.badlogic.gdx.graphics.g2d.BitmapFont.TextBounds;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.todoroo.zxzx.Assets;

public class SimpleButton {
    private HAlignment alignment;
    private String text;
    private boolean wasPressed;
    private float x;
    private float y;
    private float w;
    private float h;
    private boolean activated;
    private boolean down;
    private BitmapFont font;
    private float textHeight;

    public SimpleButton(String text, BitmapFont font) {
        this.text = text;
        this.wasPressed = false;
        this.activated = false;
        this.down = false;
        this.font = font;
        TextBounds bounds = Assets.textFont.getBounds(text);
        textHeight = bounds.height;
        w = bounds.width * 2;
        h = bounds.height * 2;
        alignment = HAlignment.CENTER;
    }

    public void setWidth(float width) {
        w = width;
    }

    public void setHeight(float height) {
        h = height;
    }

    public void setAlignment(HAlignment alignment) {
        this.alignment = alignment;
    }

    public void update(float delta, boolean justTouched, boolean isTouched, boolean justReleased, float x,
            float y) {
        wasPressed = false;
        if (justTouched && inBounds(x, y)) {
            activated = true;
            down = true;
        } else if (isTouched) {
            down = activated && inBounds(x, y);
        } else if (justReleased) {
            wasPressed = activated && inBounds(x, y);
            activated = false;
            down = false;
        } else {
            activated = false;
        }
    }

    private boolean inBounds(float x, float y) {
        return x >= this.x && x < this.x + this.w && y >= this.y && y < this.y + this.h;
    }

    public void draw(SpriteBatch spriteBatch) {
        Color oldColor = font.getColor();
        if (down) {
            spriteBatch.setColor(Color.RED);
        } else {
            spriteBatch.setColor(Color.BLUE);
        }
        spriteBatch.setColor(Color.WHITE);
        if (down) {
            font.setColor(oldColor.r / 2, oldColor.g / 2, oldColor.b / 2, oldColor.a);
        }
        float textX = x;
        float textY = y + h;
        textY -= (h - textHeight) / 2;
        font.drawWrapped(spriteBatch, text, textX, textY, w, alignment);
        font.setColor(oldColor);
    }

    public boolean wasPressed() {
        return this.wasPressed;
    }

    public void rightOn(float right) {
        x = right - w;
    }

    public void leftOn(float left) {
        x = left;
    }

    public void centerHorizontallyOn(float centerX) {
        x = centerX - w / 2;
    }

    public void bottomOn(float bottom) {
        y = bottom;
    }

    public void topOn(float top) {
        y = top - h;
    }

    public void centerVerticallyOn(float centerY) {
        y = centerY - h / 2;
    }
}