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seven332 committed 2015-01-27 20:10:45 +08:00
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commit 6004602ab3
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app/src/main/java/com/hippo/util/ViewUtils.java
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/*
* Copyright (C) 2015 Hippo Seven
*
* 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
* 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.hippo.util;
import android.annotation.TargetApi;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.os.Build;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;
public final class ViewUtils {
/**
* Get view center location in window
*
* @param view the view to check
* @param location an array of two integers in which to hold the coordinates
*/
public static void getCenterInWindows(View view, int[] location) {
getLocationInWindow(view, location);
location[0] += view.getWidth() / 2;
location[1] += view.getHeight() / 2;
}
/**
* Get view location in window
*
* @param view the view to check
* @param location an array of two integers in which to hold the coordinates
*/
public static void getLocationInWindow(View view, int[] location) {
if (location == null || location.length < 2) {
throw new IllegalArgumentException(
"location must be an array of two integers");
}
float[] position = new float[2];
position[0] = view.getLeft();
position[1] = view.getTop();
ViewParent viewParent = view.getParent();
while (viewParent instanceof View) {
view = (View) viewParent;
if (view.getId() == android.R.id.content) {
break;
}
position[0] -= view.getScrollX();
position[1] -= view.getScrollY();
position[0] += view.getLeft();
position[1] += view.getTop();
viewParent = view.getParent();
}
location[0] = (int) (position[0] + 0.5f);
location[1] = (int) (position[1] + 0.5f);
}
/**
* Look for a ancestor view with the given id. If this view has the given
* id, return this view.
*
* @param view the view to start with
* @param id The id to search for.
* @return The view that has the given id in the hierarchy or null
*/
public static View getAncestor(View view, int id) {
if (view.getId() == id) {
return view;
}
ViewParent viewParent = view.getParent();
while (viewParent instanceof View) {
view = (View) viewParent;
if (view.getId() == id) {
return view;
}
viewParent = view.getParent();
}
return null;
}
/**
* Returns a bitmap showing a screenshot of the view passed in.
*
* @param v The view to get screenshot
* @return The screenshot
*/
public static Bitmap getBitmapFromView(View v) {
int width = v.getWidth();
int height = v.getHeight();
if (width == 0 && height == 0) {
width = v.getMeasuredWidth();
height = v.getMeasuredHeight();
}
Bitmap bitmap = Bitmap.createBitmap(width, height,
Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.translate(-v.getScrollX(), -v.getScrollY());
v.draw(canvas);
return bitmap;
}
/**
* Remove view from its parent
*
* @param view the view to remove
*/
public static void removeFromParent(View view) {
ViewParent vp = view.getParent();
if (vp instanceof ViewGroup)
((ViewGroup) vp).removeView(view);
}
/**
* Method that removes the support for HardwareAcceleration from a
* {@link android.view.View}.<br/>
* <br/>
* Check AOSP notice:<br/>
*
* <pre>
* 'ComposeShader can only contain shaders of different types (a BitmapShader and a
* LinearGradient for instance, but not two instances of BitmapShader)'. But, 'If your
* application is affected by any of these missing features or limitations, you can turn
* off hardware acceleration for just the affected portion of your application by calling
* setLayerType(View.LAYER_TYPE_SOFTWARE, null).'
* </pre>
*
* @param v
* The view
*/
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public static void removeHardwareAccelerationSupport(View v) {
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.HONEYCOMB) {
if (v.getLayerType() != View.LAYER_TYPE_SOFTWARE) {
v.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
}
}
public static void measureView(View v, int width, int height) {
int widthMeasureSpec;
int heightMeasureSpec;
if (width == ViewGroup.LayoutParams.WRAP_CONTENT)
widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(0,
View.MeasureSpec.UNSPECIFIED);
else
widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(Math.max(width, 0),
View.MeasureSpec.EXACTLY);
if (height == ViewGroup.LayoutParams.WRAP_CONTENT)
heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(0,
View.MeasureSpec.UNSPECIFIED);
else
heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(Math.max(height, 0),
View.MeasureSpec.EXACTLY);
v.measure(widthMeasureSpec, heightMeasureSpec);
}
/**
* Determine if the supplied view is under the given point in the
* parent view's coordinate system.
*
* @param view Child view of the parent to hit test
* @param x X position to test in the parent's coordinate system
* @param y Y position to test in the parent's coordinate system
* @return true if the supplied view is under the given point, false otherwise
*/
public static boolean isViewUnder(View view, int x, int y) {
if (view == null || view.getVisibility() != View.VISIBLE) {
return false;
}
return x >= view.getLeft() &&
x < view.getRight() &&
y >= view.getTop() &&
y < view.getBottom();
}
/**
* Set the enabled state of this view.
*
* @param v the view to set the enabled state
* @param visibility One of GONE, INVISIBLE, or GONE.
*/
public static void setVisibility(View v, int visibility) {
if (visibility != v.getVisibility()) {
v.setVisibility(visibility);
}
}
public static final int MEASURED_STATE_TOO_SMALL = 0x01000000;
public static final int MEASURED_STATE_MASK = 0xff000000;
/**
* Utility to reconcile a desired size and state, with constraints imposed
* by a MeasureSpec. Will take the desired size, unless a different size
* is imposed by the constraints. The returned value is a compound integer,
* with the resolved size in the MEASURED_SIZE_MASK bits and
* optionally the bit {@link #MEASURED_STATE_TOO_SMALL} set if the resulting
* size is smaller than the size the view wants to be.
*
* @param size How big the view wants to be
* @param measureSpec Constraints imposed by the parent
* @return Size information bit mask as defined by
*/
public static int resolveSizeAndState(int size, int measureSpec, int childMeasuredState) {
int result = size;
int specMode = View.MeasureSpec.getMode(measureSpec);
int specSize = View.MeasureSpec.getSize(measureSpec);
switch (specMode) {
case View.MeasureSpec.UNSPECIFIED:
result = size;
break;
case View.MeasureSpec.AT_MOST:
if (specSize < size) {
result = specSize | MEASURED_STATE_TOO_SMALL;
} else {
result = size;
}
break;
case View.MeasureSpec.EXACTLY:
result = specSize;
break;
}
return result | (childMeasuredState&MEASURED_STATE_MASK);
}
}
app/src/main/java/com/hippo/widget/FixedAspectImageView.java
+256
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/*
* Copyright (C) 2014-2015 Hippo Seven
*
* 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
* 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.hippo.widget;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;
import com.hippo.ehviewer.R;
import com.hippo.util.ViewUtils;
/**
* aspect is width / height
*
* @author Hippo
*
*/
public class FixedAspectImageView extends ImageView {
private static final String TAG = FixedAspectImageView.class.getSimpleName();
private static final int[] ATTRS = new int[] {
android.R.attr.adjustViewBounds,
android.R.attr.maxWidth,
android.R.attr.maxHeight
};
private int mMaxWidth = Integer.MAX_VALUE;
private int mMaxHeight = Integer.MAX_VALUE;
private boolean mAdjustViewBounds = false;
private float mAspect = -1f;
public FixedAspectImageView(Context context) {
super(context);
}
public FixedAspectImageView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public FixedAspectImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
TypedArray a;
// Make sure we get value from xml
a = context.obtainStyledAttributes(attrs, ATTRS, defStyle, 0);
setAdjustViewBounds(a.getBoolean(0, false));
setMaxWidth(a.getDimensionPixelSize(1, Integer.MAX_VALUE));
setMaxHeight(a.getDimensionPixelSize(2, Integer.MAX_VALUE));
a.recycle();
a = context.obtainStyledAttributes(
attrs, R.styleable.FixedAspectImageView, defStyle, 0);
setAspect(a.getFloat(R.styleable.FixedAspectImageView_aspect, -1f));
a.recycle();
}
@Override
public void setMaxWidth(int maxWidth) {
super.setMaxWidth(maxWidth);
mMaxWidth = maxWidth;
}
@Override
public void setMaxHeight(int maxHeight) {
super.setMaxHeight(maxHeight);
mMaxHeight = maxHeight;
}
@Override
public void setAdjustViewBounds(boolean adjustViewBounds) {
super.setAdjustViewBounds(adjustViewBounds);
mAdjustViewBounds = adjustViewBounds;
}
/**
* Enable aspect will set AdjustViewBounds true.
* Any negative float to disable it,
* disable Aspect will not disable AdjustViewBounds.
*
* @param ratio width/height
*/
public void setAspect(float ratio) {
if (ratio > 0) {
mAspect = ratio;
setAdjustViewBounds(true);
} else {
mAspect = -1f;
}
requestLayout();
}
private int resolveAdjustedSize(int desiredSize, int maxSize,
int measureSpec) {
int result = desiredSize;
int specMode = MeasureSpec.getMode(measureSpec);
int specSize = MeasureSpec.getSize(measureSpec);
switch (specMode) {
case MeasureSpec.UNSPECIFIED:
/* Parent says we can be as big as we want. Just don't be larger
* than max size imposed on ourselves.
*/
result = Math.min(desiredSize, maxSize);
break;
case MeasureSpec.AT_MOST:
// Parent says we can be as big as we want, up to specSize.
// Don't be larger than specSize, and don't be larger than
// the max size imposed on ourselves.
result = Math.min(Math.min(desiredSize, specSize), maxSize);
break;
case MeasureSpec.EXACTLY:
// No choice. Do what we are told.
result = specSize;
break;
}
return result;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int w;
int h;
// Desired aspect ratio of the view's contents (not including padding)
float desiredAspect = 0.0f;
// We are allowed to change the view's width
boolean resizeWidth = false;
// We are allowed to change the view's height
boolean resizeHeight = false;
final int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
final int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
Drawable drawable = getDrawable();
if (drawable == null) {
// If no drawable, its intrinsic size is 0.
w = h = 0;
if (mAdjustViewBounds && mAspect > 0.0f) {
resizeWidth = widthSpecMode != MeasureSpec.EXACTLY;
resizeHeight = heightSpecMode != MeasureSpec.EXACTLY;
desiredAspect = mAspect;
}
} else {
w = drawable.getIntrinsicWidth();
h = drawable.getIntrinsicHeight();
if (w <= 0) w = 1;
if (h <= 0) h = 1;
// We are supposed to adjust view bounds to match the aspect
// ratio of our drawable. See if that is possible.
if (mAdjustViewBounds) {
resizeWidth = widthSpecMode != MeasureSpec.EXACTLY;
resizeHeight = heightSpecMode != MeasureSpec.EXACTLY;
desiredAspect = mAspect <= 0.0f ? ((float) w / (float) h) : mAspect;
}
}
int pleft = getPaddingLeft();
int pright = getPaddingRight();
int ptop = getPaddingTop();
int pbottom = getPaddingBottom();
int widthSize;
int heightSize;
if (resizeWidth || resizeHeight) {
// If we get here, it means we want to resize to match the
// drawables aspect ratio, and we have the freedom to change at
// least one dimension.
// Get the max possible width given our constraints
widthSize = resolveAdjustedSize(w + pleft + pright, mMaxWidth, widthMeasureSpec);
// Get the max possible height given our constraints
heightSize = resolveAdjustedSize(h + ptop + pbottom, mMaxHeight, heightMeasureSpec);
if (desiredAspect != 0.0f) {
// See what our actual aspect ratio is
float actualAspect = (float)(widthSize - pleft - pright) /
(heightSize - ptop - pbottom);
if (Math.abs(actualAspect - desiredAspect) > 0.0000001) {
boolean done = false;
// Try adjusting width to be proportional to height
if (resizeWidth) {
int newWidth = (int)(desiredAspect * (heightSize - ptop - pbottom)) +
pleft + pright;
// Allow the width to outgrow its original estimate if height is fixed.
if (!resizeHeight) {
widthSize = resolveAdjustedSize(newWidth, mMaxWidth, widthMeasureSpec);
}
if (newWidth <= widthSize) {
widthSize = newWidth;
done = true;
}
}
// Try adjusting height to be proportional to width
if (!done && resizeHeight) {
int newHeight = (int)((widthSize - pleft - pright) / desiredAspect) +
ptop + pbottom;
// Allow the height to outgrow its original estimate if width is fixed.
if (!resizeWidth) {
heightSize = resolveAdjustedSize(newHeight, mMaxHeight,
heightMeasureSpec);
}
if (newHeight <= heightSize) {
heightSize = newHeight;
}
}
}
}
} else {
// We are either don't want to preserve the drawables aspect ratio,
// or we are not allowed to change view dimensions. Just measure in
// the normal way.
w += pleft + pright;
h += ptop + pbottom;
w = Math.max(w, getSuggestedMinimumWidth());
h = Math.max(h, getSuggestedMinimumHeight());
widthSize = ViewUtils.resolveSizeAndState(w, widthMeasureSpec, 0);
heightSize = ViewUtils.resolveSizeAndState(h, heightMeasureSpec, 0);
}
setMeasuredDimension(widthSize, heightSize);
}
}