michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.toolbar;
michael@0: 
michael@0: import org.mozilla.gecko.GeckoApplication;
michael@0: import org.mozilla.gecko.LightweightTheme;
michael@0: import org.mozilla.gecko.LightweightThemeDrawable;
michael@0: import org.mozilla.gecko.R;
michael@0: import org.mozilla.gecko.widget.ThemedImageButton;
michael@0: 
michael@0: import android.content.Context;
michael@0: import android.content.res.TypedArray;
michael@0: import android.graphics.Canvas;
michael@0: import android.graphics.Path;
michael@0: import android.graphics.PorterDuff.Mode;
michael@0: import android.graphics.drawable.Drawable;
michael@0: import android.graphics.drawable.StateListDrawable;
michael@0: import android.util.AttributeSet;
michael@0: 
michael@0: public class ShapedButton extends ThemedImageButton
michael@0:                           implements CanvasDelegate.DrawManager {
michael@0:     protected final LightweightTheme mTheme;
michael@0: 
michael@0:     private final Path mPath;
michael@0:     private final CurveTowards mSide;
michael@0: 
michael@0:     protected final CanvasDelegate mCanvasDelegate;
michael@0: 
michael@0:     private enum CurveTowards { NONE, LEFT, RIGHT };
michael@0: 
michael@0:     public ShapedButton(Context context, AttributeSet attrs) {
michael@0:         super(context, attrs);
michael@0:         mTheme = ((GeckoApplication) context.getApplicationContext()).getLightweightTheme();
michael@0: 
michael@0:         TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.BrowserToolbarCurve);
michael@0:         int curveTowards = a.getInt(R.styleable.BrowserToolbarCurve_curveTowards, 0x00);
michael@0:         a.recycle();
michael@0: 
michael@0:         if (curveTowards == 0x00)
michael@0:             mSide = CurveTowards.NONE;
michael@0:         else if (curveTowards == 0x01)
michael@0:             mSide = CurveTowards.LEFT;
michael@0:         else
michael@0:             mSide = CurveTowards.RIGHT;
michael@0: 
michael@0:         // Path is clipped.
michael@0:         mPath = new Path();
michael@0:         mCanvasDelegate = new CanvasDelegate(this, Mode.DST_IN);
michael@0: 
michael@0:         setWillNotDraw(false);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
michael@0:         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
michael@0: 
michael@0:         if (mSide == CurveTowards.NONE)
michael@0:             return;
michael@0: 
michael@0:         final int width = getMeasuredWidth();
michael@0:         final int height = getMeasuredHeight();
michael@0:         final int curve = (int) (height * 1.125f);
michael@0: 
michael@0:         mPath.reset();
michael@0: 
michael@0:         if (mSide == CurveTowards.RIGHT) {
michael@0:             mPath.moveTo(0, 0);
michael@0:             mPath.cubicTo(curve * 0.75f, 0,
michael@0:                           curve * 0.25f, height,
michael@0:                           curve, height);
michael@0:             mPath.lineTo(width, height);
michael@0:             mPath.lineTo(width, 0);
michael@0:             mPath.lineTo(0, 0);
michael@0:         } else if (mSide == CurveTowards.LEFT) {
michael@0:             mPath.moveTo(width, 0);
michael@0:             mPath.cubicTo((width - (curve * 0.75f)), 0,
michael@0:                           (width - (curve * 0.25f)), height,
michael@0:                           (width - curve), height);
michael@0:             mPath.lineTo(0, height);
michael@0:             mPath.lineTo(0, 0);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void draw(Canvas canvas) {
michael@0:         if (mCanvasDelegate != null && mSide != CurveTowards.NONE)
michael@0:             mCanvasDelegate.draw(canvas, mPath, getWidth(), getHeight());
michael@0:         else
michael@0:             defaultDraw(canvas);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void defaultDraw(Canvas canvas) {
michael@0:         super.draw(canvas);
michael@0:     }
michael@0: 
michael@0:     // The drawable is constructed as per @drawable/shaped_button.
michael@0:     @Override
michael@0:     public void onLightweightThemeChanged() {
michael@0:         final int background = getResources().getColor(R.color.background_tabs);
michael@0:         final LightweightThemeDrawable lightWeight = mTheme.getColorDrawable(this, background);
michael@0: 
michael@0:         if (lightWeight == null)
michael@0:             return;
michael@0: 
michael@0:         lightWeight.setAlpha(34, 34);
michael@0: 
michael@0:         final StateListDrawable stateList = new StateListDrawable();
michael@0:         stateList.addState(PRESSED_ENABLED_STATE_SET, getColorDrawable(R.color.highlight_shaped));
michael@0:         stateList.addState(FOCUSED_STATE_SET, getColorDrawable(R.color.highlight_shaped_focused));
michael@0:         stateList.addState(PRIVATE_STATE_SET, getColorDrawable(R.color.background_tabs));
michael@0:         stateList.addState(EMPTY_STATE_SET, lightWeight);
michael@0: 
michael@0:         setBackgroundDrawable(stateList);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onLightweightThemeReset() {
michael@0:         setBackgroundResource(R.drawable.shaped_button);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void setBackgroundDrawable(Drawable drawable) {
michael@0:         if (getBackground() == null || drawable == null) {
michael@0:             super.setBackgroundDrawable(drawable);
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         int[] padding =  new int[] { getPaddingLeft(),
michael@0:                                      getPaddingTop(),
michael@0:                                      getPaddingRight(),
michael@0:                                      getPaddingBottom()
michael@0:                                    };
michael@0:         drawable.setLevel(getBackground().getLevel());
michael@0:         super.setBackgroundDrawable(drawable);
michael@0: 
michael@0:         setPadding(padding[0], padding[1], padding[2], padding[3]);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void setBackgroundResource(int resId) {
michael@0:         setBackgroundDrawable(getResources().getDrawable(resId));
michael@0:     }
michael@0: }