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package com.google.android.DemoKit;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;
public class JoystickView extends View {
private Drawable mJoystickBackground;
private Drawable mJoystickPressed;
private Drawable mJoystickNormal;
private int fX;
private int fY;
Boolean fPressed;
private Paint mLabelPaint;
private String mLabelText;
public JoystickView(Context context) {
super(context);
initJoystickView(context);
}
public JoystickView(Context context, AttributeSet attrs) {
super(context, attrs);
initJoystickView(context);
}
public void setPosition(int x, int y) {
fX = x;
fY = y;
mLabelText = String.format("%d,%d", fX, fY);
invalidate();
}
public void setPressed(boolean pressed) {
fPressed = pressed;
invalidate();
}
private void initJoystickView(Context context) {
fX = fY = 0;
fPressed = false;
Resources r = context.getResources();
mJoystickBackground = r.getDrawable(R.drawable.joystick_background);
int w = mJoystickBackground.getIntrinsicWidth();
int h = mJoystickBackground.getIntrinsicHeight();
mJoystickBackground.setBounds(0, 0, w, h);
mJoystickPressed = r.getDrawable(R.drawable.joystick_pressed_holo_dark);
mJoystickNormal = r.getDrawable(R.drawable.joystick_normal_holo_dark);
Utilities.centerAround(w / 2 - 4, h / 2 + 4, mJoystickNormal);
Utilities.centerAround(w / 2 - 4, h / 2 + 4, mJoystickPressed);
mLabelPaint = new Paint();
mLabelPaint.setColor(Color.WHITE);
mLabelPaint.setTextSize(24);
mLabelPaint.setAntiAlias(true);
mLabelPaint.setShadowLayer(1, 2, 2, Color.BLACK);
setPosition(0, 0);
}
@Override
protected void onDraw(Canvas canvas) {
mJoystickBackground.draw(canvas);
Drawable indicator = fPressed ? mJoystickPressed : mJoystickNormal;
int w = mJoystickBackground.getIntrinsicWidth();
int h = mJoystickBackground.getIntrinsicHeight();
int x = w / 2 - 4 + fX;
int y = h / 2 + 4 + fY;
Utilities.centerAround(x, y, indicator);
indicator.draw(canvas);
canvas.drawText(mLabelText, x + 12, y + 8, mLabelPaint);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
setMeasuredDimension(mJoystickBackground.getIntrinsicWidth(),
mJoystickBackground.getIntrinsicHeight());
}
}
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