Repository: Baseflow/PhotoView
Branch: master
Commit: 565505d5cb84
Files: 66
Total size: 123.5 KB
Directory structure:
gitextract_rensreqv/
├── .github/
│ ├── FUNDING.yml
│ ├── ISSUE_TEMPLATE/
│ │ ├── a-regression.md
│ │ ├── b-bug-report.md
│ │ ├── c-feature-request.md
│ │ ├── d-enhancement-proposal.md
│ │ └── e-question.md
│ └── PULL_REQUEST_TEMPLATE.md
├── .gitignore
├── CODE_OF_CONDUCT.md
├── CONTRIBUTING.md
├── LICENSE
├── README.md
├── build.gradle
├── gradle/
│ └── wrapper/
│ ├── gradle-wrapper.jar
│ └── gradle-wrapper.properties
├── gradle.properties
├── gradlew
├── gradlew.bat
├── photoview/
│ ├── build.gradle
│ └── src/
│ └── main/
│ ├── AndroidManifest.xml
│ └── java/
│ └── com/
│ └── github/
│ └── chrisbanes/
│ └── photoview/
│ ├── Compat.java
│ ├── CustomGestureDetector.java
│ ├── OnGestureListener.java
│ ├── OnMatrixChangedListener.java
│ ├── OnOutsidePhotoTapListener.java
│ ├── OnPhotoTapListener.java
│ ├── OnScaleChangedListener.java
│ ├── OnSingleFlingListener.java
│ ├── OnViewDragListener.java
│ ├── OnViewTapListener.java
│ ├── PhotoView.java
│ ├── PhotoViewAttacher.java
│ └── Util.java
├── sample/
│ ├── build.gradle
│ └── src/
│ └── main/
│ ├── AndroidManifest.xml
│ ├── java/
│ │ └── com/
│ │ └── github/
│ │ └── chrisbanes/
│ │ └── photoview/
│ │ └── sample/
│ │ ├── ActivityTransitionActivity.java
│ │ ├── ActivityTransitionToActivity.java
│ │ ├── CoilSampleActivity.kt
│ │ ├── HackyDrawerLayout.java
│ │ ├── HackyViewPager.java
│ │ ├── ImageAdapter.java
│ │ ├── ImageViewHolder.java
│ │ ├── ImmersiveActivity.java
│ │ ├── LauncherActivity.java
│ │ ├── PicassoSampleActivity.java
│ │ ├── RotationSampleActivity.java
│ │ ├── SimpleSampleActivity.java
│ │ └── ViewPagerActivity.java
│ └── res/
│ ├── drawable/
│ │ └── ic_arrow_back_white_24dp.xml
│ ├── layout/
│ │ ├── activity_immersive.xml
│ │ ├── activity_launcher.xml
│ │ ├── activity_rotation_sample.xml
│ │ ├── activity_simple.xml
│ │ ├── activity_simple_sample.xml
│ │ ├── activity_transition.xml
│ │ ├── activity_transition_to.xml
│ │ ├── activity_view_pager.xml
│ │ ├── item_image.xml
│ │ └── item_sample.xml
│ ├── menu/
│ │ ├── main_menu.xml
│ │ └── rotation.xml
│ └── values/
│ ├── colors.xml
│ ├── strings.xml
│ ├── styles.xml
│ └── transitions.xml
└── settings.gradle
================================================
FILE CONTENTS
================================================
================================================
FILE: .github/FUNDING.yml
================================================
github: Baseflow
custom: https://baseflow.com/contact
================================================
FILE: .github/ISSUE_TEMPLATE/a-regression.md
================================================
---
name: 🔙 Regression
about: Report unexpected behavior that worked previously
---
## 🔙 Regression
### Old (and correct) behavior
### Current behavior
### Reproduction steps
### Configuration
**Version:** 1.x
**Platform:** :robot: Android 9.x
================================================
FILE: .github/ISSUE_TEMPLATE/b-bug-report.md
================================================
---
name: 🐛 Bug Report
about: Create a report to help us fix bugs and make improvements
---
## 🐛 Bug Report
### Expected behavior
### Reproduction steps
### Configuration
**Version:** 1.x
**Platform:** :robot: Android 9.x
================================================
FILE: .github/ISSUE_TEMPLATE/c-feature-request.md
================================================
---
name: 🚀 Feature Request
about: Want to see something new included in the Framework? Submit it!
---
## 🚀 Feature Requests
### Contextualize the feature
### Describe the feature
================================================
FILE: .github/ISSUE_TEMPLATE/d-enhancement-proposal.md
================================================
---
name: 🏗 Enhancement Proposal
about: Proposals for code cleanup, refactor and improvements in general
---
## 🏗 Enhancement Proposal
### Pitch
================================================
FILE: .github/ISSUE_TEMPLATE/e-question.md
================================================
---
name: 💬 Questions and Help
about: If you have questions, please use this for support
---
## 💬 Questions and Help
For questions or help we recommend checking:
- [Stack Overflow](https://stackoverflow.com/)
================================================
FILE: .github/PULL_REQUEST_TEMPLATE.md
================================================
### :sparkles: What kind of change does this PR introduce? (Bug fix, feature, docs update...)
### :arrow_heading_down: What is the current behavior?
### :new: What is the new behavior (if this is a feature change)?
### :boom: Does this PR introduce a breaking change?
### :bug: Recommendations for testing
### :memo: Links to relevant issues/docs
### :thinking: Checklist before submitting
- [ ] All projects build
- [ ] Follows style guide lines
- [ ] Relevant documentation was updated
- [ ] Rebased onto current develop
================================================
FILE: .gitignore
================================================
#Android generated
bin
gen
#Eclipse
.project
.classpath
.settings
#IntelliJ IDEA
.idea
*.iml
*.ipr
*.iws
out
#Maven
target
release.properties
pom.xml.*
#Ant
build.xml
local.properties
proguard.cfg
#OSX
.DS_Store
#Gradle
.gradle
build
================================================
FILE: CODE_OF_CONDUCT.md
================================================
# Contributor Covenant Code of Conduct
## Our Pledge
In the interest of fostering an open and welcoming environment, we as
contributors and maintainers pledge to making participation in our project and
our community a harassment-free experience for everyone, regardless of age, body
size, disability, ethnicity, gender identity and expression, level of experience,
nationality, personal appearance, race, religion, or sexual identity and
orientation.
## Our Standards
Examples of behavior that contributes to creating a positive environment
include:
* Using welcoming and inclusive language
* Being respectful of differing viewpoints and experiences
* Gracefully accepting constructive criticism
* Focusing on what is best for the community
* Showing empathy towards other community members
Examples of unacceptable behavior by participants include:
* The use of sexualized language or imagery and unwelcome sexual attention or
advances
* Trolling, insulting/derogatory comments, and personal or political attacks
* Public or private harassment
* Publishing others' private information, such as a physical or electronic
address, without explicit permission
* Other conduct which could reasonably be considered inappropriate in a
professional setting
## Our Responsibilities
Project maintainers are responsible for clarifying the standards of acceptable
behavior and are expected to take appropriate and fair corrective action in
response to any instances of unacceptable behavior.
Project maintainers have the right and responsibility to remove, edit, or
reject comments, commits, code, wiki edits, issues, and other contributions
that are not aligned to this Code of Conduct, or to ban temporarily or
permanently any contributor for other behaviors that they deem inappropriate,
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## Enforcement
Instances of abusive, harassing, or otherwise unacceptable behavior may be
reported by contacting the project team at [mvvmcross@gmail.com](mailto:mvvmcross@gmail). All
complaints will be reviewed and investigated and will result in a response that
is deemed necessary and appropriate to the circumstances. The project team is
obligated to maintain confidentiality with regard to the reporter of an incident.
Further details of specific enforcement policies may be posted separately.
Project maintainers who do not follow or enforce the Code of Conduct in good
faith may face temporary or permanent repercussions as determined by other
members of the project's leadership.
## Attribution
This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
available at [http://contributor-covenant.org/version/1/4][version]
[homepage]: http://contributor-covenant.org
[version]: http://contributor-covenant.org/version/1/4/
================================================
FILE: CONTRIBUTING.md
================================================
# Contributing to PhotoView
## Finding an issue to work on
If you'd like to work on something that isn't in a current issue, especially if it would be a big change, please open a new issue for discussion!
================================================
FILE: LICENSE
================================================
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================================================
FILE: README.md
================================================
# PhotoView
PhotoView aims to help produce an easily usable implementation of a zooming Android ImageView.
[](https://jitpack.io/#chrisbanes/PhotoView)
[
## Dependency
Add this in your root `build.gradle` file (**not** your module `build.gradle` file):
```gradle
allprojects {
repositories {
maven { url "https://www.jitpack.io" }
}
}
buildscript {
repositories {
maven { url "https://www.jitpack.io" }
}
}
```
Then, add the library to your module `build.gradle`
```gradle
dependencies {
implementation 'com.github.chrisbanes:PhotoView:latest.release.here'
}
```
## Features
- Out of the box zooming, using multi-touch and double-tap.
- Scrolling, with smooth scrolling fling.
- Works perfectly when used in a scrolling parent (such as ViewPager).
- Allows the application to be notified when the displayed Matrix has changed. Useful for when you need to update your UI based on the current zoom/scroll position.
- Allows the application to be notified when the user taps on the Photo.
## Usage
There is a [sample](https://github.com/chrisbanes/PhotoView/tree/master/sample) provided which shows how to use the library in a more advanced way, but for completeness, here is all that is required to get PhotoView working:
```xml
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.github.chrisbanes.photoview; import android.content.Context; import android.graphics.Matrix; import android.graphics.RectF; import android.graphics.drawable.Drawable; import android.net.Uri; import android.util.AttributeSet; import android.view.GestureDetector; import androidx.appcompat.widget.AppCompatImageView; /** * A zoomable ImageView. See {@link PhotoViewAttacher} for most of the details on how the zooming * is accomplished */ @SuppressWarnings("unused") public class PhotoView extends AppCompatImageView { private PhotoViewAttacher attacher; private ScaleType pendingScaleType; public PhotoView(Context context) { this(context, null); } public PhotoView(Context context, AttributeSet attr) { this(context, attr, 0); } public PhotoView(Context context, AttributeSet attr, int defStyle) { super(context, attr, defStyle); init(); } private void init() { attacher = new PhotoViewAttacher(this); //We always pose as a Matrix scale type, though we can change to another scale type //via the attacher super.setScaleType(ScaleType.MATRIX); //apply the previously applied scale type if (pendingScaleType != null) { setScaleType(pendingScaleType); pendingScaleType = null; } } /** * Get the current {@link PhotoViewAttacher} for this view. Be wary of holding on to references * to this attacher, as it has a reference to this view, which, if a reference is held in the * wrong place, can cause memory leaks. * * @return the attacher. */ public PhotoViewAttacher getAttacher() { return attacher; } @Override public ScaleType getScaleType() { return attacher.getScaleType(); } @Override public Matrix getImageMatrix() { return attacher.getImageMatrix(); } @Override public void setOnLongClickListener(OnLongClickListener l) { attacher.setOnLongClickListener(l); } @Override public void setOnClickListener(OnClickListener l) { attacher.setOnClickListener(l); } @Override public void setScaleType(ScaleType scaleType) { if (attacher == null) { pendingScaleType = scaleType; } else { attacher.setScaleType(scaleType); } } @Override public void setImageDrawable(Drawable drawable) { super.setImageDrawable(drawable); // setImageBitmap calls through to this method if (attacher != null) { attacher.update(); } } @Override public void setImageResource(int resId) { super.setImageResource(resId); if (attacher != null) { attacher.update(); } } @Override public void setImageURI(Uri uri) { super.setImageURI(uri); if (attacher != null) { attacher.update(); } } @Override protected boolean setFrame(int l, int t, int r, int b) { boolean changed = super.setFrame(l, t, r, b); if (changed) { attacher.update(); } return changed; } public void setRotationTo(float rotationDegree) { attacher.setRotationTo(rotationDegree); } public void setRotationBy(float rotationDegree) { attacher.setRotationBy(rotationDegree); } public boolean isZoomable() { return attacher.isZoomable(); } public void setZoomable(boolean zoomable) { attacher.setZoomable(zoomable); } public RectF getDisplayRect() { return attacher.getDisplayRect(); } public void getDisplayMatrix(Matrix matrix) { attacher.getDisplayMatrix(matrix); } @SuppressWarnings("UnusedReturnValue") public boolean setDisplayMatrix(Matrix finalRectangle) { return attacher.setDisplayMatrix(finalRectangle); } public void getSuppMatrix(Matrix matrix) { attacher.getSuppMatrix(matrix); } public boolean setSuppMatrix(Matrix matrix) { return attacher.setDisplayMatrix(matrix); } public float getMinimumScale() { return attacher.getMinimumScale(); } public float getMediumScale() { return attacher.getMediumScale(); } public float getMaximumScale() { return attacher.getMaximumScale(); } public float getScale() { return attacher.getScale(); } public void setAllowParentInterceptOnEdge(boolean allow) { attacher.setAllowParentInterceptOnEdge(allow); } public void setMinimumScale(float minimumScale) { attacher.setMinimumScale(minimumScale); } public void setMediumScale(float mediumScale) { attacher.setMediumScale(mediumScale); } public void setMaximumScale(float maximumScale) { attacher.setMaximumScale(maximumScale); } public void setScaleLevels(float minimumScale, float mediumScale, float maximumScale) { attacher.setScaleLevels(minimumScale, mediumScale, maximumScale); } public void setOnMatrixChangeListener(OnMatrixChangedListener listener) { attacher.setOnMatrixChangeListener(listener); } public void setOnPhotoTapListener(OnPhotoTapListener listener) { attacher.setOnPhotoTapListener(listener); } public void setOnOutsidePhotoTapListener(OnOutsidePhotoTapListener listener) { attacher.setOnOutsidePhotoTapListener(listener); } public void setOnViewTapListener(OnViewTapListener listener) { attacher.setOnViewTapListener(listener); } public void setOnViewDragListener(OnViewDragListener listener) { attacher.setOnViewDragListener(listener); } public void setScale(float scale) { attacher.setScale(scale); } public void setScale(float scale, boolean animate) { attacher.setScale(scale, animate); } public void setScale(float scale, float focalX, float focalY, boolean animate) { attacher.setScale(scale, focalX, focalY, animate); } public void setZoomTransitionDuration(int milliseconds) { attacher.setZoomTransitionDuration(milliseconds); } public void setOnDoubleTapListener(GestureDetector.OnDoubleTapListener onDoubleTapListener) { attacher.setOnDoubleTapListener(onDoubleTapListener); } public void setOnScaleChangeListener(OnScaleChangedListener onScaleChangedListener) { attacher.setOnScaleChangeListener(onScaleChangedListener); } public void setOnSingleFlingListener(OnSingleFlingListener onSingleFlingListener) { attacher.setOnSingleFlingListener(onSingleFlingListener); } } ================================================ FILE: photoview/src/main/java/com/github/chrisbanes/photoview/PhotoViewAttacher.java ================================================ /* Copyright 2011, 2012 Chris Banes.
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.github.chrisbanes.photoview;
import android.content.Context;
import android.graphics.Matrix;
import android.graphics.Matrix.ScaleToFit;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnLongClickListener;
import android.view.ViewParent;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.Interpolator;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
import android.widget.OverScroller;
/**
* The component of {@link PhotoView} which does the work allowing for zooming, scaling, panning, etc.
* It is made public in case you need to subclass something other than AppCompatImageView and still
* gain the functionality that {@link PhotoView} offers
*/
public class PhotoViewAttacher implements View.OnTouchListener,
View.OnLayoutChangeListener {
private static float DEFAULT_MAX_SCALE = 3.0f;
private static float DEFAULT_MID_SCALE = 1.75f;
private static float DEFAULT_MIN_SCALE = 1.0f;
private static int DEFAULT_ZOOM_DURATION = 200;
private static final int HORIZONTAL_EDGE_NONE = -1;
private static final int HORIZONTAL_EDGE_LEFT = 0;
private static final int HORIZONTAL_EDGE_RIGHT = 1;
private static final int HORIZONTAL_EDGE_BOTH = 2;
private static final int VERTICAL_EDGE_NONE = -1;
private static final int VERTICAL_EDGE_TOP = 0;
private static final int VERTICAL_EDGE_BOTTOM = 1;
private static final int VERTICAL_EDGE_BOTH = 2;
private static int SINGLE_TOUCH = 1;
private Interpolator mInterpolator = new AccelerateDecelerateInterpolator();
private int mZoomDuration = DEFAULT_ZOOM_DURATION;
private float mMinScale = DEFAULT_MIN_SCALE;
private float mMidScale = DEFAULT_MID_SCALE;
private float mMaxScale = DEFAULT_MAX_SCALE;
private boolean mAllowParentInterceptOnEdge = true;
private boolean mBlockParentIntercept = false;
private ImageView mImageView;
// Gesture Detectors
private GestureDetector mGestureDetector;
private CustomGestureDetector mScaleDragDetector;
// These are set so we don't keep allocating them on the heap
private final Matrix mBaseMatrix = new Matrix();
private final Matrix mDrawMatrix = new Matrix();
private final Matrix mSuppMatrix = new Matrix();
private final RectF mDisplayRect = new RectF();
private final float[] mMatrixValues = new float[9];
// Listeners
private OnMatrixChangedListener mMatrixChangeListener;
private OnPhotoTapListener mPhotoTapListener;
private OnOutsidePhotoTapListener mOutsidePhotoTapListener;
private OnViewTapListener mViewTapListener;
private View.OnClickListener mOnClickListener;
private OnLongClickListener mLongClickListener;
private OnScaleChangedListener mScaleChangeListener;
private OnSingleFlingListener mSingleFlingListener;
private OnViewDragListener mOnViewDragListener;
private FlingRunnable mCurrentFlingRunnable;
private int mHorizontalScrollEdge = HORIZONTAL_EDGE_BOTH;
private int mVerticalScrollEdge = VERTICAL_EDGE_BOTH;
private float mBaseRotation;
private boolean mZoomEnabled = true;
private ScaleType mScaleType = ScaleType.FIT_CENTER;
private OnGestureListener onGestureListener = new OnGestureListener() {
@Override
public void onDrag(float dx, float dy) {
if (mScaleDragDetector.isScaling()) {
return; // Do not drag if we are already scaling
}
if (mOnViewDragListener != null) {
mOnViewDragListener.onDrag(dx, dy);
}
mSuppMatrix.postTranslate(dx, dy);
checkAndDisplayMatrix();
/*
* Here we decide whether to let the ImageView's parent to start taking
* over the touch event.
*
* First we check whether this function is enabled. We never want the
* parent to take over if we're scaling. We then check the edge we're
* on, and the direction of the scroll (i.e. if we're pulling against
* the edge, aka 'overscrolling', let the parent take over).
*/
ViewParent parent = mImageView.getParent();
if (mAllowParentInterceptOnEdge && !mScaleDragDetector.isScaling() && !mBlockParentIntercept) {
if (mHorizontalScrollEdge == HORIZONTAL_EDGE_BOTH
|| (mHorizontalScrollEdge == HORIZONTAL_EDGE_LEFT && dx >= 1f)
|| (mHorizontalScrollEdge == HORIZONTAL_EDGE_RIGHT && dx <= -1f)
|| (mVerticalScrollEdge == VERTICAL_EDGE_TOP && dy >= 1f)
|| (mVerticalScrollEdge == VERTICAL_EDGE_BOTTOM && dy <= -1f)) {
if (parent != null) {
parent.requestDisallowInterceptTouchEvent(false);
}
}
} else {
if (parent != null) {
parent.requestDisallowInterceptTouchEvent(true);
}
}
}
@Override
public void onFling(float startX, float startY, float velocityX, float velocityY) {
mCurrentFlingRunnable = new FlingRunnable(mImageView.getContext());
mCurrentFlingRunnable.fling(getImageViewWidth(mImageView),
getImageViewHeight(mImageView), (int) velocityX, (int) velocityY);
mImageView.post(mCurrentFlingRunnable);
}
@Override
public void onScale(float scaleFactor, float focusX, float focusY) {
onScale(scaleFactor, focusX, focusY, 0, 0);
}
@Override
public void onScale(float scaleFactor, float focusX, float focusY, float dx, float dy) {
if (getScale() < mMaxScale || scaleFactor < 1f) {
if (mScaleChangeListener != null) {
mScaleChangeListener.onScaleChange(scaleFactor, focusX, focusY);
}
mSuppMatrix.postScale(scaleFactor, scaleFactor, focusX, focusY);
mSuppMatrix.postTranslate(dx, dy);
checkAndDisplayMatrix();
}
}
};
public PhotoViewAttacher(ImageView imageView) {
mImageView = imageView;
imageView.setOnTouchListener(this);
imageView.addOnLayoutChangeListener(this);
if (imageView.isInEditMode()) {
return;
}
mBaseRotation = 0.0f;
// Create Gesture Detectors...
mScaleDragDetector = new CustomGestureDetector(imageView.getContext(), onGestureListener);
mGestureDetector = new GestureDetector(imageView.getContext(), new GestureDetector.SimpleOnGestureListener() {
// forward long click listener
@Override
public void onLongPress(MotionEvent e) {
if (mLongClickListener != null) {
mLongClickListener.onLongClick(mImageView);
}
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2,
float velocityX, float velocityY) {
if (mSingleFlingListener != null) {
if (getScale() > DEFAULT_MIN_SCALE) {
return false;
}
if (e1.getPointerCount() > SINGLE_TOUCH
|| e2.getPointerCount() > SINGLE_TOUCH) {
return false;
}
return mSingleFlingListener.onFling(e1, e2, velocityX, velocityY);
}
return false;
}
});
mGestureDetector.setOnDoubleTapListener(new GestureDetector.OnDoubleTapListener() {
@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
if (mOnClickListener != null) {
mOnClickListener.onClick(mImageView);
}
final RectF displayRect = getDisplayRect();
final float x = e.getX(), y = e.getY();
if (mViewTapListener != null) {
mViewTapListener.onViewTap(mImageView, x, y);
}
if (displayRect != null) {
// Check to see if the user tapped on the photo
if (displayRect.contains(x, y)) {
float xResult = (x - displayRect.left)
/ displayRect.width();
float yResult = (y - displayRect.top)
/ displayRect.height();
if (mPhotoTapListener != null) {
mPhotoTapListener.onPhotoTap(mImageView, xResult, yResult);
}
return true;
} else {
if (mOutsidePhotoTapListener != null) {
mOutsidePhotoTapListener.onOutsidePhotoTap(mImageView);
}
}
}
return false;
}
@Override
public boolean onDoubleTap(MotionEvent ev) {
try {
float scale = getScale();
float x = ev.getX();
float y = ev.getY();
if (scale < getMediumScale()) {
setScale(getMediumScale(), x, y, true);
} else if (scale >= getMediumScale() && scale < getMaximumScale()) {
setScale(getMaximumScale(), x, y, true);
} else {
setScale(getMinimumScale(), x, y, true);
}
} catch (ArrayIndexOutOfBoundsException e) {
// Can sometimes happen when getX() and getY() is called
}
return true;
}
@Override
public boolean onDoubleTapEvent(MotionEvent e) {
// Wait for the confirmed onDoubleTap() instead
return false;
}
});
}
public void setOnDoubleTapListener(GestureDetector.OnDoubleTapListener newOnDoubleTapListener) {
this.mGestureDetector.setOnDoubleTapListener(newOnDoubleTapListener);
}
public void setOnScaleChangeListener(OnScaleChangedListener onScaleChangeListener) {
this.mScaleChangeListener = onScaleChangeListener;
}
public void setOnSingleFlingListener(OnSingleFlingListener onSingleFlingListener) {
this.mSingleFlingListener = onSingleFlingListener;
}
@Deprecated
public boolean isZoomEnabled() {
return mZoomEnabled;
}
public RectF getDisplayRect() {
checkMatrixBounds();
return getDisplayRect(getDrawMatrix());
}
public boolean setDisplayMatrix(Matrix finalMatrix) {
if (finalMatrix == null) {
throw new IllegalArgumentException("Matrix cannot be null");
}
if (mImageView.getDrawable() == null) {
return false;
}
mSuppMatrix.set(finalMatrix);
checkAndDisplayMatrix();
return true;
}
public void setBaseRotation(final float degrees) {
mBaseRotation = degrees % 360;
update();
setRotationBy(mBaseRotation);
checkAndDisplayMatrix();
}
public void setRotationTo(float degrees) {
mSuppMatrix.setRotate(degrees % 360);
checkAndDisplayMatrix();
}
public void setRotationBy(float degrees) {
mSuppMatrix.postRotate(degrees % 360);
checkAndDisplayMatrix();
}
public float getMinimumScale() {
return mMinScale;
}
public float getMediumScale() {
return mMidScale;
}
public float getMaximumScale() {
return mMaxScale;
}
public float getScale() {
return (float) Math.sqrt((float) Math.pow(getValue(mSuppMatrix, Matrix.MSCALE_X), 2) + (float) Math.pow
(getValue(mSuppMatrix, Matrix.MSKEW_Y), 2));
}
public ScaleType getScaleType() {
return mScaleType;
}
@Override
public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int
oldRight, int oldBottom) {
// Update our base matrix, as the bounds have changed
if (left != oldLeft || top != oldTop || right != oldRight || bottom != oldBottom) {
updateBaseMatrix(mImageView.getDrawable());
}
}
@Override
public boolean onTouch(View v, MotionEvent ev) {
boolean handled = false;
if (mZoomEnabled && Util.hasDrawable((ImageView) v)) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
ViewParent parent = v.getParent();
// First, disable the Parent from intercepting the touch
// event
if (parent != null) {
parent.requestDisallowInterceptTouchEvent(true);
}
// If we're flinging, and the user presses down, cancel
// fling
cancelFling();
break;
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP:
// If the user has zoomed less than min scale, zoom back
// to min scale
if (getScale() < mMinScale) {
RectF rect = getDisplayRect();
if (rect != null) {
v.post(new AnimatedZoomRunnable(getScale(), mMinScale,
rect.centerX(), rect.centerY()));
handled = true;
}
} else if (getScale() > mMaxScale) {
RectF rect = getDisplayRect();
if (rect != null) {
v.post(new AnimatedZoomRunnable(getScale(), mMaxScale,
rect.centerX(), rect.centerY()));
handled = true;
}
}
break;
}
// Try the Scale/Drag detector
if (mScaleDragDetector != null) {
boolean wasScaling = mScaleDragDetector.isScaling();
boolean wasDragging = mScaleDragDetector.isDragging();
handled = mScaleDragDetector.onTouchEvent(ev);
boolean didntScale = !wasScaling && !mScaleDragDetector.isScaling();
boolean didntDrag = !wasDragging && !mScaleDragDetector.isDragging();
mBlockParentIntercept = didntScale && didntDrag;
}
// Check to see if the user double tapped
if (mGestureDetector != null && mGestureDetector.onTouchEvent(ev)) {
handled = true;
}
}
return handled;
}
public void setAllowParentInterceptOnEdge(boolean allow) {
mAllowParentInterceptOnEdge = allow;
}
public void setMinimumScale(float minimumScale) {
Util.checkZoomLevels(minimumScale, mMidScale, mMaxScale);
mMinScale = minimumScale;
}
public void setMediumScale(float mediumScale) {
Util.checkZoomLevels(mMinScale, mediumScale, mMaxScale);
mMidScale = mediumScale;
}
public void setMaximumScale(float maximumScale) {
Util.checkZoomLevels(mMinScale, mMidScale, maximumScale);
mMaxScale = maximumScale;
}
public void setScaleLevels(float minimumScale, float mediumScale, float maximumScale) {
Util.checkZoomLevels(minimumScale, mediumScale, maximumScale);
mMinScale = minimumScale;
mMidScale = mediumScale;
mMaxScale = maximumScale;
}
public void setOnLongClickListener(OnLongClickListener listener) {
mLongClickListener = listener;
}
public void setOnClickListener(View.OnClickListener listener) {
mOnClickListener = listener;
}
public void setOnMatrixChangeListener(OnMatrixChangedListener listener) {
mMatrixChangeListener = listener;
}
public void setOnPhotoTapListener(OnPhotoTapListener listener) {
mPhotoTapListener = listener;
}
public void setOnOutsidePhotoTapListener(OnOutsidePhotoTapListener mOutsidePhotoTapListener) {
this.mOutsidePhotoTapListener = mOutsidePhotoTapListener;
}
public void setOnViewTapListener(OnViewTapListener listener) {
mViewTapListener = listener;
}
public void setOnViewDragListener(OnViewDragListener listener) {
mOnViewDragListener = listener;
}
public void setScale(float scale) {
setScale(scale, false);
}
public void setScale(float scale, boolean animate) {
setScale(scale,
(mImageView.getRight()) / 2,
(mImageView.getBottom()) / 2,
animate);
}
public void setScale(float scale, float focalX, float focalY,
boolean animate) {
// Check to see if the scale is within bounds
if (scale < mMinScale || scale > mMaxScale) {
throw new IllegalArgumentException("Scale must be within the range of minScale and maxScale");
}
if (animate) {
mImageView.post(new AnimatedZoomRunnable(getScale(), scale,
focalX, focalY));
} else {
mSuppMatrix.setScale(scale, scale, focalX, focalY);
checkAndDisplayMatrix();
}
}
/**
* Set the zoom interpolator
*
* @param interpolator the zoom interpolator
*/
public void setZoomInterpolator(Interpolator interpolator) {
mInterpolator = interpolator;
}
public void setScaleType(ScaleType scaleType) {
if (Util.isSupportedScaleType(scaleType) && scaleType != mScaleType) {
mScaleType = scaleType;
update();
}
}
public boolean isZoomable() {
return mZoomEnabled;
}
public void setZoomable(boolean zoomable) {
mZoomEnabled = zoomable;
update();
}
public void update() {
if (mZoomEnabled) {
// Update the base matrix using the current drawable
updateBaseMatrix(mImageView.getDrawable());
} else {
// Reset the Matrix...
resetMatrix();
}
}
/**
* Get the display matrix
*
* @param matrix target matrix to copy to
*/
public void getDisplayMatrix(Matrix matrix) {
matrix.set(getDrawMatrix());
}
/**
* Get the current support matrix
*/
public void getSuppMatrix(Matrix matrix) {
matrix.set(mSuppMatrix);
}
private Matrix getDrawMatrix() {
mDrawMatrix.set(mBaseMatrix);
mDrawMatrix.postConcat(mSuppMatrix);
return mDrawMatrix;
}
public Matrix getImageMatrix() {
return mDrawMatrix;
}
public void setZoomTransitionDuration(int milliseconds) {
this.mZoomDuration = milliseconds;
}
/**
* Helper method that 'unpacks' a Matrix and returns the required value
*
* @param matrix Matrix to unpack
* @param whichValue Which value from Matrix.M* to return
* @return returned value
*/
private float getValue(Matrix matrix, int whichValue) {
matrix.getValues(mMatrixValues);
return mMatrixValues[whichValue];
}
/**
* Resets the Matrix back to FIT_CENTER, and then displays its contents
*/
private void resetMatrix() {
mSuppMatrix.reset();
setRotationBy(mBaseRotation);
setImageViewMatrix(getDrawMatrix());
checkMatrixBounds();
}
private void setImageViewMatrix(Matrix matrix) {
mImageView.setImageMatrix(matrix);
// Call MatrixChangedListener if needed
if (mMatrixChangeListener != null) {
RectF displayRect = getDisplayRect(matrix);
if (displayRect != null) {
mMatrixChangeListener.onMatrixChanged(displayRect);
}
}
}
/**
* Helper method that simply checks the Matrix, and then displays the result
*/
private void checkAndDisplayMatrix() {
if (checkMatrixBounds()) {
setImageViewMatrix(getDrawMatrix());
}
}
/**
* Helper method that maps the supplied Matrix to the current Drawable
*
* @param matrix - Matrix to map Drawable against
* @return RectF - Displayed Rectangle
*/
private RectF getDisplayRect(Matrix matrix) {
Drawable d = mImageView.getDrawable();
if (d != null) {
mDisplayRect.set(0, 0, d.getIntrinsicWidth(),
d.getIntrinsicHeight());
matrix.mapRect(mDisplayRect);
return mDisplayRect;
}
return null;
}
/**
* Calculate Matrix for FIT_CENTER
*
* @param drawable - Drawable being displayed
*/
private void updateBaseMatrix(Drawable drawable) {
if (drawable == null) {
return;
}
final float viewWidth = getImageViewWidth(mImageView);
final float viewHeight = getImageViewHeight(mImageView);
final int drawableWidth = drawable.getIntrinsicWidth();
final int drawableHeight = drawable.getIntrinsicHeight();
mBaseMatrix.reset();
final float widthScale = viewWidth / drawableWidth;
final float heightScale = viewHeight / drawableHeight;
if (mScaleType == ScaleType.CENTER) {
mBaseMatrix.postTranslate((viewWidth - drawableWidth) / 2F,
(viewHeight - drawableHeight) / 2F);
} else if (mScaleType == ScaleType.CENTER_CROP) {
float scale = Math.max(widthScale, heightScale);
mBaseMatrix.postScale(scale, scale);
mBaseMatrix.postTranslate((viewWidth - drawableWidth * scale) / 2F,
(viewHeight - drawableHeight * scale) / 2F);
} else if (mScaleType == ScaleType.CENTER_INSIDE) {
float scale = Math.min(1.0f, Math.min(widthScale, heightScale));
mBaseMatrix.postScale(scale, scale);
mBaseMatrix.postTranslate((viewWidth - drawableWidth * scale) / 2F,
(viewHeight - drawableHeight * scale) / 2F);
} else {
RectF mTempSrc = new RectF(0, 0, drawableWidth, drawableHeight);
RectF mTempDst = new RectF(0, 0, viewWidth, viewHeight);
if ((int) mBaseRotation % 180 != 0) {
mTempSrc = new RectF(0, 0, drawableHeight, drawableWidth);
}
switch (mScaleType) {
case FIT_CENTER:
mBaseMatrix.setRectToRect(mTempSrc, mTempDst, ScaleToFit.CENTER);
break;
case FIT_START:
mBaseMatrix.setRectToRect(mTempSrc, mTempDst, ScaleToFit.START);
break;
case FIT_END:
mBaseMatrix.setRectToRect(mTempSrc, mTempDst, ScaleToFit.END);
break;
case FIT_XY:
mBaseMatrix.setRectToRect(mTempSrc, mTempDst, ScaleToFit.FILL);
break;
default:
break;
}
}
resetMatrix();
}
private boolean checkMatrixBounds() {
final RectF rect = getDisplayRect(getDrawMatrix());
if (rect == null) {
return false;
}
final float height = rect.height(), width = rect.width();
float deltaX = 0, deltaY = 0;
final int viewHeight = getImageViewHeight(mImageView);
if (height <= viewHeight) {
switch (mScaleType) {
case FIT_START:
deltaY = -rect.top;
break;
case FIT_END:
deltaY = viewHeight - height - rect.top;
break;
default:
deltaY = (viewHeight - height) / 2 - rect.top;
break;
}
mVerticalScrollEdge = VERTICAL_EDGE_BOTH;
} else if (rect.top > 0) {
mVerticalScrollEdge = VERTICAL_EDGE_TOP;
deltaY = -rect.top;
} else if (rect.bottom < viewHeight) {
mVerticalScrollEdge = VERTICAL_EDGE_BOTTOM;
deltaY = viewHeight - rect.bottom;
} else {
mVerticalScrollEdge = VERTICAL_EDGE_NONE;
}
final int viewWidth = getImageViewWidth(mImageView);
if (width <= viewWidth) {
switch (mScaleType) {
case FIT_START:
deltaX = -rect.left;
break;
case FIT_END:
deltaX = viewWidth - width - rect.left;
break;
default:
deltaX = (viewWidth - width) / 2 - rect.left;
break;
}
mHorizontalScrollEdge = HORIZONTAL_EDGE_BOTH;
} else if (rect.left > 0) {
mHorizontalScrollEdge = HORIZONTAL_EDGE_LEFT;
deltaX = -rect.left;
} else if (rect.right < viewWidth) {
deltaX = viewWidth - rect.right;
mHorizontalScrollEdge = HORIZONTAL_EDGE_RIGHT;
} else {
mHorizontalScrollEdge = HORIZONTAL_EDGE_NONE;
}
// Finally actually translate the matrix
mSuppMatrix.postTranslate(deltaX, deltaY);
return true;
}
private int getImageViewWidth(ImageView imageView) {
return imageView.getWidth() - imageView.getPaddingLeft() - imageView.getPaddingRight();
}
private int getImageViewHeight(ImageView imageView) {
return imageView.getHeight() - imageView.getPaddingTop() - imageView.getPaddingBottom();
}
private void cancelFling() {
if (mCurrentFlingRunnable != null) {
mCurrentFlingRunnable.cancelFling();
mCurrentFlingRunnable = null;
}
}
private class AnimatedZoomRunnable implements Runnable {
private final float mFocalX, mFocalY;
private final long mStartTime;
private final float mZoomStart, mZoomEnd;
public AnimatedZoomRunnable(final float currentZoom, final float targetZoom,
final float focalX, final float focalY) {
mFocalX = focalX;
mFocalY = focalY;
mStartTime = System.currentTimeMillis();
mZoomStart = currentZoom;
mZoomEnd = targetZoom;
}
@Override
public void run() {
float t = interpolate();
float scale = mZoomStart + t * (mZoomEnd - mZoomStart);
float deltaScale = scale / getScale();
onGestureListener.onScale(deltaScale, mFocalX, mFocalY);
// We haven't hit our target scale yet, so post ourselves again
if (t < 1f) {
Compat.postOnAnimation(mImageView, this);
}
}
private float interpolate() {
float t = 1f * (System.currentTimeMillis() - mStartTime) / mZoomDuration;
t = Math.min(1f, t);
t = mInterpolator.getInterpolation(t);
return t;
}
}
private class FlingRunnable implements Runnable {
private final OverScroller mScroller;
private int mCurrentX, mCurrentY;
public FlingRunnable(Context context) {
mScroller = new OverScroller(context);
}
public void cancelFling() {
mScroller.forceFinished(true);
}
public void fling(int viewWidth, int viewHeight, int velocityX,
int velocityY) {
final RectF rect = getDisplayRect();
if (rect == null) {
return;
}
final int startX = Math.round(-rect.left);
final int minX, maxX, minY, maxY;
if (viewWidth < rect.width()) {
minX = 0;
maxX = Math.round(rect.width() - viewWidth);
} else {
minX = maxX = startX;
}
final int startY = Math.round(-rect.top);
if (viewHeight < rect.height()) {
minY = 0;
maxY = Math.round(rect.height() - viewHeight);
} else {
minY = maxY = startY;
}
mCurrentX = startX;
mCurrentY = startY;
// If we actually can move, fling the scroller
if (startX != maxX || startY != maxY) {
mScroller.fling(startX, startY, velocityX, velocityY, minX,
maxX, minY, maxY, 0, 0);
}
}
@Override
public void run() {
if (mScroller.isFinished()) {
return; // remaining post that should not be handled
}
if (mScroller.computeScrollOffset()) {
final int newX = mScroller.getCurrX();
final int newY = mScroller.getCurrY();
mSuppMatrix.postTranslate(mCurrentX - newX, mCurrentY - newY);
checkAndDisplayMatrix();
mCurrentX = newX;
mCurrentY = newY;
// Post On animation
Compat.postOnAnimation(mImageView, this);
}
}
}
}
================================================
FILE: photoview/src/main/java/com/github/chrisbanes/photoview/Util.java
================================================
package com.github.chrisbanes.photoview;
import android.view.MotionEvent;
import android.widget.ImageView;
class Util {
static void checkZoomLevels(float minZoom, float midZoom,
float maxZoom) {
if (minZoom >= midZoom) {
throw new IllegalArgumentException(
"Minimum zoom has to be less than Medium zoom. Call setMinimumZoom() with a more appropriate value");
} else if (midZoom >= maxZoom) {
throw new IllegalArgumentException(
"Medium zoom has to be less than Maximum zoom. Call setMaximumZoom() with a more appropriate value");
}
}
static boolean hasDrawable(ImageView imageView) {
return imageView.getDrawable() != null;
}
static boolean isSupportedScaleType(final ImageView.ScaleType scaleType) {
if (scaleType == null) {
return false;
}
switch (scaleType) {
case MATRIX:
throw new IllegalStateException("Matrix scale type is not supported");
}
return true;
}
static int getPointerIndex(int action) {
return (action & MotionEvent.ACTION_POINTER_INDEX_MASK) >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
}
}
================================================
FILE: sample/build.gradle
================================================
apply plugin: "com.android.application"
apply plugin: "kotlin-android"
android {
compileSdkVersion rootProject.ext.sdkVersion
defaultConfig {
applicationId "uk.co.senab.photoview.sample"
minSdkVersion rootProject.ext.minSdkVersion
targetSdkVersion rootProject.ext.sdkVersion
versionCode 100
versionName "1.0"
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
lintOptions {
abortOnError false
}
}
tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
kotlinOptions {
jvmTarget = "1.8"
}
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation "androidx.appcompat:appcompat:1.1.0"
implementation "androidx.recyclerview:recyclerview:1.1.0"
implementation "com.google.android.material:material:1.1.0"
implementation "com.squareup.picasso:picasso:2.5.2"
implementation("io.coil-kt:coil:0.9.1")
implementation project(":photoview")
}
================================================
FILE: sample/src/main/AndroidManifest.xml
================================================