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adding initial Gif view zooming, not done yet

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This commit is contained in:
tibbi 2019-01-14 23:48:52 +01:00
parent 6c019c8edc
commit b916f0c619
3 changed files with 206 additions and 10 deletions
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14
app/src/main/kotlin/com/simplemobiletools/gallery/pro/fragments/PhotoFragment.kt
View file

@ -2,10 +2,7 @@ package com.simplemobiletools.gallery.pro.fragments
import android.content.Intent
import android.content.res.Configuration
import android.graphics.Bitmap
import android.graphics.BitmapFactory
import android.graphics.Color
import android.graphics.Matrix
import android.graphics.*
import android.graphics.drawable.ColorDrawable
import android.graphics.drawable.PictureDrawable
import android.media.ExifInterface.*
@ -292,6 +289,7 @@ class PhotoFragment : ViewPagerFragment() {
}
private fun loadImage() {
checkScreenDimensions()
mImageOrientation = getImageOrientation()
when {
mMedium.isGIF() -> loadGif()
@ -310,8 +308,11 @@ class PhotoFragment : ViewPagerFragment() {
}
mView.photo_view.beGone()
mView.gif_view.beVisible()
mView.gif_view.setInputSource(source)
val resolution = mMedium.path.getImageResolution() ?: Point(0, 0)
mView.gif_view.apply {
setInputSource(source)
setupSizes(resolution.x, resolution.y, mScreenWidth, mScreenHeight)
}
} catch (e: Exception) {
loadBitmap()
} catch (e: OutOfMemoryError) {
@ -328,7 +329,6 @@ class PhotoFragment : ViewPagerFragment() {
}
private fun loadBitmap(degrees: Int = 0) {
checkScreenDimensions()
var pathToLoad = if (mMedium.path.startsWith("content://")) mMedium.path else "file://${mMedium.path}"
pathToLoad = pathToLoad.replace("%", "%25").replace("#", "%23")

195
app/src/main/kotlin/com/simplemobiletools/gallery/pro/views/MyZoomableGifTextureView.kt Normal file
View file

@ -0,0 +1,195 @@
package com.simplemobiletools.gallery.pro.views
import android.content.Context
import android.graphics.Matrix
import android.graphics.RectF
import android.util.AttributeSet
import android.view.MotionEvent
import android.view.ScaleGestureDetector
import android.widget.ImageView
import com.simplemobiletools.commons.extensions.beVisible
import com.simplemobiletools.gallery.pro.helpers.*
import pl.droidsonroids.gif.GifTextureView
// allow horizontal swipes through the layout, else it can cause glitches at zoomed in images
class MyZoomableGifTextureView(context: Context, attrs: AttributeSet) : GifTextureView(context, attrs) {
private var mSaveScale = 1f
private var mRight = 0f
private var mBottom = 0f
private var mLastTouchX = 0f
private var mLastTouchY = 0f
private var mTouchDownTime = 0L
private var mTouchDownX = 0f
private var mTouchDownY = 0f
private var mGifWidth = 0f
private var mGifHeight = 0f
private var mScreenWidth = 0f
private var mScreenHeight = 0f
private var mLastFocusX = 0f
private var mLastFocusY = 0f
private var mCurrZoomMode = ZOOM_MODE_NONE
private var mScaleDetector: ScaleGestureDetector? = null
private var mMatrices = FloatArray(9)
private val mMatrix = Matrix()
private var mOrigRect = RectF()
private var mWantedRect = RectF()
init {
mScaleDetector = ScaleGestureDetector(context, ScaleListener())
}
fun setupSizes(gifWidth: Int, gifHeight: Int, screenWidth: Int, screenHeight: Int) {
// if we don't know the gifs' resolution, just display it and disable zooming
if (gifWidth == 0 || gifHeight == 0) {
scaleType = ImageView.ScaleType.FIT_CENTER
mScaleDetector = null
beVisible()
return
}
mGifWidth = gifWidth.toFloat()
mGifHeight = gifHeight.toFloat()
mScreenWidth = screenWidth.toFloat()
mScreenHeight = screenHeight.toFloat()
// we basically want scaleType fitCenter, but we have to use matrices to reach that
mOrigRect = RectF(0f, 0f, mGifWidth, mGifHeight)
mWantedRect = RectF(0f, 0f, mScreenWidth, mScreenHeight)
mMatrix.setRectToRect(mOrigRect, mWantedRect, Matrix.ScaleToFit.CENTER)
setTransform(mMatrix)
invalidate()
beVisible()
}
override fun onTouchEvent(event: MotionEvent): Boolean {
mScaleDetector?.onTouchEvent(event)
mMatrix.getValues(mMatrices)
mMatrix.setRectToRect(mOrigRect, mWantedRect, Matrix.ScaleToFit.CENTER)
mMatrix.postScale(mSaveScale, mSaveScale, mLastFocusX, mLastFocusY)
val x = mMatrices[Matrix.MTRANS_X]
val y = mMatrices[Matrix.MTRANS_Y]
when (event.actionMasked) {
MotionEvent.ACTION_DOWN -> {
mTouchDownTime = System.currentTimeMillis()
mCurrZoomMode = ZOOM_MODE_DRAG
mLastTouchX = event.x
mLastTouchY = event.y
mTouchDownX = event.x
mTouchDownY = event.y
}
MotionEvent.ACTION_UP -> {
mCurrZoomMode = ZOOM_MODE_NONE
if (System.currentTimeMillis() - mTouchDownTime < CLICK_MAX_DURATION) {
performClick()
}
}
MotionEvent.ACTION_POINTER_DOWN -> {
mLastTouchX = event.x
mLastTouchY = event.y
mCurrZoomMode = ZOOM_MODE_ZOOM
}
MotionEvent.ACTION_MOVE -> {
if (mCurrZoomMode == ZOOM_MODE_ZOOM || mCurrZoomMode == ZOOM_MODE_DRAG && mSaveScale > MIN_VIDEO_ZOOM_SCALE) {
var diffX = event.x - mLastTouchX
var diffY = event.y - mLastTouchY
if (y + diffY > 0) {
diffY = -y
} else if (y + diffY < -mBottom) {
diffY = -(y + mBottom)
}
if (x + diffX > 0) {
diffX = -x
} else if (x + diffX < -mRight) {
diffX = -(x + mRight)
}
mMatrix.postTranslate(diffX, diffY)
mLastTouchX = event.x
mLastTouchY = event.y
}
}
MotionEvent.ACTION_POINTER_UP -> {
mCurrZoomMode = ZOOM_MODE_NONE
}
}
setTransform(mMatrix)
invalidate()
return true
}
// taken from https://github.com/Manuiq/ZoomableTextureView
private inner class ScaleListener : ScaleGestureDetector.SimpleOnScaleGestureListener() {
override fun onScaleBegin(detector: ScaleGestureDetector): Boolean {
mCurrZoomMode = ZOOM_MODE_ZOOM
return true
}
override fun onScale(detector: ScaleGestureDetector): Boolean {
mLastFocusX = detector.focusX
mLastFocusY = detector.focusY
var scaleFactor = detector.scaleFactor
val origScale = mSaveScale
mSaveScale *= scaleFactor
if (mSaveScale > MAX_VIDEO_ZOOM_SCALE) {
mSaveScale = MAX_VIDEO_ZOOM_SCALE
scaleFactor = MAX_VIDEO_ZOOM_SCALE / origScale
} else if (mSaveScale < MIN_VIDEO_ZOOM_SCALE) {
mSaveScale = MIN_VIDEO_ZOOM_SCALE
scaleFactor = MIN_VIDEO_ZOOM_SCALE / origScale
}
mRight = width * mSaveScale - width
mBottom = height * mSaveScale - height
if (0 <= width || 0 <= height) {
mMatrix.postScale(scaleFactor, scaleFactor, detector.focusX, detector.focusY)
if (scaleFactor < 1) {
mMatrix.getValues(mMatrices)
val x = mMatrices[Matrix.MTRANS_X]
val y = mMatrices[Matrix.MTRANS_Y]
if (scaleFactor < 1) {
if (0 < width) {
if (y < -mBottom) {
mMatrix.postTranslate(0f, -(y + mBottom))
} else if (y > 0) {
mMatrix.postTranslate(0f, -y)
}
} else {
if (x < -mRight) {
mMatrix.postTranslate(-(x + mRight), 0f)
} else if (x > 0) {
mMatrix.postTranslate(-x, 0f)
}
}
}
}
} else {
mMatrix.postScale(scaleFactor, scaleFactor, detector.focusX, detector.focusY)
mMatrix.getValues(mMatrices)
val x = mMatrices[Matrix.MTRANS_X]
val y = mMatrices[Matrix.MTRANS_Y]
if (scaleFactor < 1) {
if (x < -mRight) {
mMatrix.postTranslate(-(x + mRight), 0f)
} else if (x > 0) {
mMatrix.postTranslate(-x, 0f)
}
if (y < -mBottom) {
mMatrix.postTranslate(0f, -(y + mBottom))
} else if (y > 0) {
mMatrix.postTranslate(0f, -y)
}
}
}
return true
}
}
}

7
app/src/main/res/layout/pager_photo_item.xml
View file

@ -11,10 +11,11 @@
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<pl.droidsonroids.gif.GifTextureView
<com.simplemobiletools.gallery.pro.views.MyZoomableGifTextureView
android:id="@+id/gif_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scaleType="matrix"
android:visibility="gone"/>
<com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView