Refactoring button class. Minor bug fixes.

Bug: 7875246
Bug: 7459118

Change-Id: Ic1099a7ae0feeeb16c8be3035f9726805149666e

3 files changed, 278 insertions, 73 deletions

diff --git a/src/com/android/gallery3d/filtershow/ui/FilterIconButton.java b/src/com/android/gallery3d/filtershow/ui/FilterIconButton.java
new file mode 100644
index 000000000..c2be85809
--- /dev/null
+++ b/src/com/android/gallery3d/filtershow/ui/FilterIconButton.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * 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.android.gallery3d.filtershow.ui;
+
+import android.app.Activity;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Rect;
+import android.graphics.drawable.Drawable;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.View;
+import android.widget.LinearLayout;
+
+import com.android.gallery3d.R;
+import com.android.gallery3d.filtershow.FilterShowActivity;
+import com.android.gallery3d.filtershow.filters.ImageFilter;
+import com.android.gallery3d.filtershow.filters.ImageFilterBorder;
+import com.android.gallery3d.filtershow.filters.ImageFilterDownsample;
+import com.android.gallery3d.filtershow.filters.ImageFilterParametricBorder;
+
+public class FilterIconButton extends IconButton implements View.OnClickListener {
+    private Bitmap mOverlayBitmap = null;
+    private FilterShowActivity mController = null;
+    private ImageFilter mImageFilter = null;
+    private LinearLayout mParentContainer = null;
+    private View.OnClickListener mListener = null;
+
+    public FilterIconButton(Context context) {
+        super(context);
+    }
+
+    public FilterIconButton(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public FilterIconButton(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    public void setup(String text, ImageFilter filter, FilterShowActivity controller,
+            LinearLayout parent) {
+        mImageFilter = filter;
+        mController = controller;
+        setText(text);
+
+        if (mImageFilter.getOverlayBitmaps() != 0) {
+            mOverlayBitmap = BitmapFactory.decodeResource(getResources(),
+                    mImageFilter.getOverlayBitmaps());
+        }
+
+        mParentContainer = parent;
+        super.setOnClickListener(this);
+        invalidate();
+    }
+
+    @Override
+    protected Bitmap drawImage(Bitmap dst, Bitmap image, Rect destination) {
+        dst = super.drawImage(dst, image, destination);
+        dst =  mImageFilter.iconApply(dst, 1.0f, false);
+        if (mOverlayBitmap != null) {
+            dst = super.drawImage(dst, mOverlayBitmap, destination);
+        }
+        return dst;
+    }
+
+    @Override
+    public void setOnClickListener(View.OnClickListener listener) {
+        mListener = listener;
+    }
+
+    @Override
+    public void onClick(View v) {
+        if (mController != null && mImageFilter != null) {
+            if (!isSelected()) {
+                mController.useFilter(mImageFilter);
+                mParentContainer.dispatchSetSelected(false);
+                setSelected(true);
+            }
+        }
+        if (mListener != null && mListener != this) {
+            mListener.onClick(v);
+        }
+    }
+
+    public ImageFilter getImageFilter() {
+        return mImageFilter;
+    }
+}
diff --git a/src/com/android/gallery3d/filtershow/ui/IconButton.java b/src/com/android/gallery3d/filtershow/ui/IconButton.java
new file mode 100644
index 000000000..1ebc1abda
--- /dev/null
+++ b/src/com/android/gallery3d/filtershow/ui/IconButton.java
@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * 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.android.gallery3d.filtershow.ui;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.text.TextUtils;
+import android.util.AttributeSet;
+import android.widget.Button;
+
+import com.android.gallery3d.R;
+
+/**
+ * Class of buttons with both an image icon and text.
+ */
+public class IconButton extends Button {
+
+    protected Bitmap mImageMirror = null;
+    protected Bitmap mIcon = null;
+
+    private boolean stale_icon = true;
+
+    public IconButton(Context context) {
+        this(context, null);
+    }
+
+    public IconButton(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public IconButton(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        BitmapDrawable ic = (BitmapDrawable) getCompoundDrawables()[1];
+
+        if (ic != null) {
+            mImageMirror = ic.getBitmap();
+        }
+    }
+
+    /**
+     * Set the image that the button icon will use.
+     *
+     * @param image image that icon will be set to before next draw.
+     */
+    public void setIcon(Bitmap image) {
+        mImageMirror = image;
+        stale_icon = true;
+    }
+
+    /**
+     * Creates and sets button icon. Only call after layout.
+     *
+     * @param image bitmap to use as icon
+     */
+    protected boolean makeAndSetIcon(Bitmap image) {
+        int size = getGoodIconSideSize();
+        if (size > 0) {
+            return setImageIcon(makeImageIcon(image, size, size));
+        }
+        return false;
+    }
+
+    /**
+     * Sets icon.
+     *
+     * @param image bitmap to set the icon to.
+     */
+    protected boolean setImageIcon(Bitmap image) {
+        if (image == null) {
+            return false;
+        }
+        mIcon = image;
+        this.setCompoundDrawablesWithIntrinsicBounds(null,
+                new BitmapDrawable(getResources(), mIcon), null, null);
+        return true;
+    }
+
+    /**
+     * Generate an icon bitmap from a given bitmap.
+     *
+     * @param image bitmap to use as button icon
+     * @param width icon width
+     * @param height icon height
+     * @return the scaled/cropped icon bitmap
+     */
+    protected Bitmap makeImageIcon(Bitmap image, int width, int height) {
+        Rect destination = new Rect(0, 0, width, height);
+        Bitmap bmap = Bitmap.createBitmap(width, height,
+                Bitmap.Config.ARGB_8888);
+        bmap = drawImage(bmap, image, destination);
+        return bmap;
+    }
+
+    /**
+     * Finds a side length for the (square) icon that fits within the button.
+     * Only call after layout.
+     *
+     * @return icon side length
+     */
+    protected int getGoodIconSideSize() {
+        Paint p = getPaint();
+        Rect bounds = new Rect();
+        String s = getText().toString();
+        p.getTextBounds(s, 0, s.length(), bounds);
+        int inner_padding = 2 * getCompoundDrawablePadding();
+        int vert = getHeight() - getPaddingTop() - getPaddingBottom() - bounds.height()
+                - inner_padding;
+        int horiz = getWidth() - getPaddingLeft() - getPaddingRight() - inner_padding;
+        return Math.min(vert, horiz);
+    }
+
+    @Override
+    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+        super.onSizeChanged(w, h, oldw, oldh);
+        stale_icon = true;
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        if (stale_icon && mImageMirror != null && mImageMirror.getHeight() > 0
+                && mImageMirror.getWidth() > 0) {
+            stale_icon = !makeAndSetIcon(mImageMirror);
+        }
+        super.onDraw(canvas);
+    }
+
+    // Override this for custom icon generation
+    protected Bitmap drawImage(Bitmap dst, Bitmap image, Rect destination) {
+        if (image != null) {
+            Canvas canvas = new Canvas(dst);
+            int iw = image.getWidth();
+            int ih = image.getHeight();
+            int x = 0;
+            int y = 0;
+            int size = 0;
+            Rect source = null;
+            if (iw > ih) {
+                size = ih;
+                x = (int) ((iw - size) / 2.0f);
+                y = 0;
+            } else {
+                size = iw;
+                x = 0;
+                y = (int) ((ih - size) / 2.0f);
+            }
+            source = new Rect(x, y, x + size, y + size);
+            canvas.drawBitmap(image, source, destination, new Paint());
+        }
+        return dst;
+    }
+
+}
diff --git a/src/com/android/gallery3d/filtershow/ui/ImageButtonTitle.java b/src/com/android/gallery3d/filtershow/ui/ImageButtonTitle.java
deleted file mode 100644
index bb37751bf..000000000
--- a/src/com/android/gallery3d/filtershow/ui/ImageButtonTitle.java
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- *
- * 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.android.gallery3d.filtershow.ui;
-
-import android.content.Context;
-import android.content.res.TypedArray;
-import android.graphics.Canvas;
-import android.graphics.Paint;
-import android.util.AttributeSet;
-import android.widget.ImageButton;
-
-import com.android.gallery3d.R;
-
-public class ImageButtonTitle extends ImageButton {
-    private static final String LOGTAG = "ImageButtonTitle";
-    private String mText = null;
-    private static int mTextSize = 24;
-    private static int mTextPadding = 20;
-    private static Paint gPaint = new Paint();
-
-    public static void setTextSize(int value) {
-        mTextSize = value;
-    }
-
-    public static void setTextPadding(int value) {
-        mTextPadding = value;
-    }
-
-    public void setText(String text) {
-        mText = text;
-    }
-
-    public ImageButtonTitle(Context context, AttributeSet attrs) {
-        super(context, attrs);
-        TypedArray a = getContext().obtainStyledAttributes(
-                attrs, R.styleable.ImageButtonTitle);
-
-        mText = a.getString(R.styleable.ImageButtonTitle_android_text);
-    }
-
-    public String getText(){
-        return mText;
-    }
-
-    @Override
-    public void onDraw(Canvas canvas) {
-        super.onDraw(canvas);
-        if (mText != null) {
-            gPaint.setARGB(255, 255, 255, 255);
-            gPaint.setTextSize(mTextSize);
-            float textWidth = gPaint.measureText(mText);
-            int x = (int) ((getWidth() - textWidth) / 2);
-            int y = getHeight() - mTextPadding;
-
-            canvas.drawText(mText, x, y, gPaint);
-        }
-    }
-
-}