Android Open Source - DivisionByZero Button

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Back to project page DivisionByZero.

License

The source code is released under:

Apache License

Java Source Code

package com.ggstudios.divisionbyzero;
/*w  w w.  j  a  va2 s  .c  o  m*/
import com.ggstudios.utils.BitmapUtils;
import com.ggstudios.utils.DebugLog;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.opengl.GLES20;
import android.view.MotionEvent;

public class Button extends PictureBox implements Clickable {
  private static final String TAG = "Button";

  private Paint paintFg, paintBg;

  private boolean isPressed = false;

  private String text;

  private Object tag;

  private Label lblText;
  
  private boolean enabled = true;
  
  private int bgResId = -1;
  
  interface OnClickListener{
    void onClick(Button sender);
  }

  private OnClickListener onClickListener;

  private RectF boundRect = new RectF();
  private RectF padding = new RectF();

  protected Button(float w, float h) {
    super(0, 0);

    this.w = w;
    this.h = h;

    initialize();
  }

  /**
   * 
   * @param x Button's x coordinate
   * @param y Button's y coordinate
   * @param w Button width
   * @param h Button height
   * @param textureHandle a handle to the texture to be drawn on the button
   */
  public Button(float x, float y, float w, float h, int resId) {
    super(x, y, w, h, -1);

    bgResId = resId;
    
    initialize();
    buildBg();
  }

  public Button(float x, float y, float w, float h, int resId, String text, Paint fg) {
    super(x, y, w, h, -1);

    this.text = text;
    paintFg = fg;

    paintBg = new Paint();
    paintBg.setAntiAlias(true);

    bgResId = resId;
    
    initialize();
    buildBg();
  }

  public Button(float x, float y, float w, float h, String text, Paint fg) {
    super(x, y, w, h, -1);

    this.text = text;
    paintFg = fg;

    initialize();
  }

  public Button(float x, float y, float w, float h, String text){
    super(x, y, w, h, -1);
    this.text = text;

    // after supplying the super constructor with our altered width and height
    // we need to store the true width and height back
    this.w = (int)w;
    this.h = (int)h;

    initialize();
  }

  private void initialize() {
    calculateBoundRect();
    
    if(paintFg == null) {
      paintFg = new Paint();
      paintFg.setTextSize(Core.SDP * 0.4f);
      paintFg.setAntiAlias(true);
      paintFg.setColor(0xFFFFFFFF);
    }
    lblText = new Label(0, 0, paintFg, text);
    
    onTextChanged();
  }
  
  private void buildBg() {
    if(bgResId == -1) return;
    
    Drawable drawable = Core.context.getResources().getDrawable(bgResId);
    drawable.setBounds(0, 0, (int)w, (int)h);
    
    Bitmap bitmap = Bitmap.createBitmap((int) w, (int) h, Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(bitmap);
    drawable.draw(c);
    
    int textureHandle = BitmapUtils.loadBitmap(bitmap);
    
    setTextureHandle(textureHandle);
  }
  
  private void onTextChanged() {
    lblText.x = (w - lblText.w) / 2f;
    lblText.y = (h - lblText.h) / 2f;
  }

  private void calculateBoundRect() {
    boundRect.left = 0 - padding.left;
    boundRect.top = 0 - padding.top;
    boundRect.bottom = h + padding.bottom;
    boundRect.right = w + padding.right;
  }

  public void setPadding(int l, int t, int r, int b) {
    padding.left = l;
    padding.top = t;
    padding.right = r;
    padding.bottom = b;
    calculateBoundRect();
  }

  public void setPadding(int p) {
    padding.left = p;
    padding.top = p;
    padding.right = p;
    padding.bottom = p;
    calculateBoundRect();
  }

  public void setPaddingBottom(int marginBottom) {
    padding.bottom = marginBottom;
    calculateBoundRect();
  }

  public void setOnClickListener(OnClickListener listener){
    this.onClickListener = listener;
  }

  @Override
  public void refresh(){
    super.refresh();
    
    if(lblText == null) return;
    lblText.refresh();
    
    buildBg();
  }

  public void setLocation(int x, int y){
    this.x = x;
    this.y = y;
  }

  @Override
  public void draw(float offX, float offY) {
    if(!isVisible) return;
    
    if(isPressed){
      GLES20.glUniform4f(Core.U_TEX_COLOR_HANDLE, 1.4f, 1.4f, 1.2f, 1.0f);
      if(textureHandle != -1)
        super.draw(offX, offY);
      if(text != null)
        lblText.draw(x + offX, y + offY);
      GLES20.glUniform4f(Core.U_TEX_COLOR_HANDLE, 1.0f, 1.0f, 1.0f, 1.0f);
    }else{
      if(textureHandle != -1)
        super.draw(offX, offY);
      if(text != null)
        lblText.draw(x + offX, y + offY);
    }
  }

  @Override
  public boolean onTouchEvent(int action, float x, float y) {
    if(!enabled) return false;
    
    final float finalX = x - this.x;
    final float finalY = y - this.y;
    
    switch(action) {
    case MotionEvent.ACTION_DOWN:
      if(boundRect.contains(finalX, finalY)){
        isPressed = true;
        return true;
      }else{
        isPressed = false;
        return false;
      }
    case MotionEvent.ACTION_MOVE:
      if(boundRect.contains(finalX, finalY)){
        return true;
      }else{
        isPressed = false;
        return false;
      }
    case MotionEvent.ACTION_UP:
      if(boundRect.contains(finalX, finalY)){

        if(isPressed){
          isPressed = false;
          if(onClickListener != null)
            onClickListener.onClick(this);

          return true;
        }
        return false;
      }
      return false;
    case MotionEvent.ACTION_CANCEL:
      isPressed = false;
      return false;
    default:
      return false;
    }
  }
  
  public Object getTag() {
    return tag;
  }

  public void setTag(Object tag) {
    this.tag = tag;
  }

  public void setEnabled(boolean enabled) {
    this.enabled = enabled;
  }

  public void setText(String text) {
    lblText.setText(text);
    this.text = text;
    
    onTextChanged();
  }

  public void click() {
    if(onClickListener != null)
      onClickListener.onClick(this);    
  }
}

Java Source Code List

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