Adding Crop, Rotate, Flip.

Bug: 7224232
Bug: 7218935

Adding geometry manipulation UI features.

Change-Id: If924313c18121e6d192a1934e76691bd578d8eb0

1 files changed, 179 insertions, 0 deletions

diff --git a/src/com/android/gallery3d/filtershow/imageshow/ImageFlip.java b/src/com/android/gallery3d/filtershow/imageshow/ImageFlip.java
new file mode 100644
index 000000000..ba01d888a
--- /dev/null
+++ b/src/com/android/gallery3d/filtershow/imageshow/ImageFlip.java
@@ -0,0 +1,179 @@
+/*
+ * 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.imageshow;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Matrix;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.graphics.RectF;
+import android.util.AttributeSet;
+
+import com.android.gallery3d.filtershow.imageshow.GeometryMetadata.FLIP;
+
+public class ImageFlip extends ImageGeometry {
+
+    private static final Paint gPaint = new Paint();
+    private static final float MIN_FLICK_DIST_FOR_FLIP = 0.2f;
+    private static final String LOGTAG = "ImageFlip";
+    private FLIP mNextFlip = FLIP.NONE;
+
+    public ImageFlip(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public ImageFlip(Context context) {
+        super(context);
+    }
+
+    @Override
+    protected void setActionDown(float x, float y) {
+        super.setActionDown(x, y);
+    }
+
+    @Override
+    protected void setActionMove(float x, float y) {
+        super.setActionMove(x, y);
+
+        float diffx = mTouchCenterX - x;
+        float diffy = mTouchCenterY - y;
+        float flick = getScaledMinFlick();
+        if (Math.abs(diffx) >= flick) {
+            // flick moving left/right
+            FLIP flip = getLocalFlip();
+            switch (flip) {
+                case NONE:
+                    flip = FLIP.HORIZONTAL;
+                    break;
+                case HORIZONTAL:
+                    flip = FLIP.NONE;
+                    break;
+                case VERTICAL:
+                    flip = FLIP.BOTH;
+                    break;
+                case BOTH:
+                    flip = FLIP.VERTICAL;
+                    break;
+                default:
+                    flip = FLIP.NONE;
+                    break;
+            }
+            mNextFlip = flip;
+        }
+        if (Math.abs(diffy) >= flick) {
+            // flick moving up/down
+            FLIP flip = getLocalFlip();
+            switch (flip) {
+                case NONE:
+                    flip = FLIP.VERTICAL;
+                    break;
+                case VERTICAL:
+                    flip = FLIP.NONE;
+                    break;
+                case HORIZONTAL:
+                    flip = FLIP.BOTH;
+                    break;
+                case BOTH:
+                    flip = FLIP.HORIZONTAL;
+                    break;
+                default:
+                    flip = FLIP.NONE;
+                    break;
+            }
+            mNextFlip = flip;
+        }
+    }
+
+    @Override
+    protected void setActionUp() {
+        super.setActionUp();
+        setLocalFlip(mNextFlip);
+    }
+
+    @Override
+    public void resetParameter() {
+        super.resetParameter();
+        mNextFlip = FLIP.NONE;
+    }
+
+    private float getScaledMinFlick() {
+        RectF disp = getLocalDisplayBounds();
+        float scaled = Math.min(disp.width(), disp.height()) * MIN_FLICK_DIST_FOR_FLIP
+                / getLocalScale();
+        return scaled;
+    }
+
+    @Override
+    protected void drawShape(Canvas canvas, Bitmap image) {
+        gPaint.setAntiAlias(true);
+        gPaint.setFilterBitmap(true);
+        gPaint.setDither(true);
+        gPaint.setARGB(255, 255, 255, 255);
+
+        FLIP flip = mNextFlip;
+        canvas.save();
+        float zoom = getLocalScale();
+        canvas.rotate(getTotalLocalRotation(), mCenterX, mCenterY);
+        canvas.scale(zoom, zoom, mCenterX, mCenterY);
+        canvas.translate(mXOffset, mYOffset);
+        if (flip == FLIP.HORIZONTAL) {
+            Matrix flipper = getHorizontalMatrix(image.getWidth());
+            canvas.drawBitmap(image, flipper, gPaint);
+        } else if (flip == FLIP.VERTICAL) {
+            Matrix flipper = getVerticalMatrix(image.getHeight());
+            canvas.drawBitmap(image, flipper, gPaint);
+        } else if (flip == FLIP.BOTH) {
+            Matrix flipper = getVerticalMatrix(image.getHeight());
+            flipper.postConcat(getHorizontalMatrix(image.getWidth()));
+            canvas.drawBitmap(image, flipper, gPaint);
+        } else {
+            canvas.drawBitmap(image, 0, 0, gPaint);
+        }
+        canvas.restore();
+
+        RectF cropBounds = getCropBoundsDisplayed(getLocalCropBounds());
+
+        Matrix m0 = new Matrix();
+        m0.setRotate(getLocalRotation(), mCenterX, mCenterY);
+        float[] corners = getCornersFromRect(cropBounds);
+        m0.mapPoints(corners);
+        gPaint.setARGB(255, 255, 255, 255);
+        // TODO: pull out style to xml
+        gPaint.setStrokeWidth(3);
+        gPaint.setStyle(Paint.Style.STROKE);
+        drawClosedPath(canvas, gPaint, corners);
+
+        canvas.save();
+        canvas.rotate(getLocalRotation(), mCenterX, mCenterY);
+        RectF displayRect = getLocalDisplayBounds();
+        float dWidth = displayRect.width();
+        float dHeight = displayRect.height();
+        RectF boundsRect = cropBounds;
+        gPaint.setARGB(128, 0, 0, 0);
+        gPaint.setStyle(Paint.Style.FILL);
+        canvas.drawRect(0, 0, dWidth, boundsRect.top, gPaint);
+        canvas.drawRect(0, boundsRect.bottom, dWidth, dHeight, gPaint);
+        canvas.drawRect(0, boundsRect.top, boundsRect.left, boundsRect.bottom,
+                gPaint);
+        canvas.drawRect(boundsRect.right, boundsRect.top, dWidth,
+                boundsRect.bottom, gPaint);
+        canvas.rotate(-getLocalRotation(), mCenterX, mCenterY);
+        canvas.restore();
+    }
+}