/*
* Copyright (C) 2007 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 android.widget;
import com.android.internal.R;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.view.Gravity;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.view.ViewTreeObserver.OnScrollChangedListener;
import android.view.View.OnTouchListener;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.StateListDrawable;
import android.os.IBinder;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import java.lang.ref.WeakReference;
/**
* <p>A popup window that can be used to display an arbitrary view. The popup
* windows is a floating container that appears on top of the current
* activity.</p>
*
* @see android.widget.AutoCompleteTextView
* @see android.widget.Spinner
*/
public class PopupWindow {
/**
* Mode for {@link #setInputMethodMode(int): the requirements for the
* input method should be based on the focusability of the popup. That is
* if it is focusable than it needs to work with the input method, else
* it doesn't.
*/
public static final int INPUT_METHOD_FROM_FOCUSABLE = 0;
/**
* Mode for {@link #setInputMethodMode(int): this popup always needs to
* work with an input method, regardless of whether it is focusable. This
* means that it will always be displayed so that the user can also operate
* the input method while it is shown.
*/
public static final int INPUT_METHOD_NEEDED = 1;
/**
* Mode for {@link #setInputMethodMode(int): this popup never needs to
* work with an input method, regardless of whether it is focusable. This
* means that it will always be displayed to use as much space on the
* screen as needed, regardless of whether this covers the input method.
*/
public static final int INPUT_METHOD_NOT_NEEDED = 2;
private final Context mContext;
private final WindowManager mWindowManager;
private boolean mIsShowing;
private boolean mIsDropdown;
private View mContentView;
private View mPopupView;
private boolean mFocusable;
private int mInputMethodMode = INPUT_METHOD_FROM_FOCUSABLE;
private boolean mTouchable = true;
private boolean mOutsideTouchable = false;
private boolean mClippingEnabled = true;
private OnTouchListener mTouchInterceptor;
private int mWidthMode;
private int mWidth;
private int mLastWidth;
private int mHeightMode;
private int mHeight;
private int mLastHeight;
private int mPopupWidth;
private int mPopupHeight;
private int[] mDrawingLocation = new int[2];
private int[] mScreenLocation = new int[2];
private Rect mTempRect = new Rect();
private Drawable mBackground;
private Drawable mAboveAnchorBackgroundDrawable;
private Drawable mBelowAnchorBackgroundDrawable;
private boolean mAboveAnchor;
private OnDismissListener mOnDismissListener;
private boolean mIgnoreCheekPress = false;
private int mAnimationStyle = -1;
private static final int[] ABOVE_ANCHOR_STATE_SET = new int[] {
com.android.internal.R.attr.state_above_anchor
};
private WeakReference<View> mAnchor;
private OnScrollChangedListener mOnScrollChangedListener =
new OnScrollChangedListener() {
public void onScrollChanged() {
View anchor = mAnchor.get();
if (anchor != null && mPopupView != null) {
WindowManager.LayoutParams p = (WindowManager.LayoutParams)
mPopupView.getLayoutParams();
mAboveAnchor = findDropDownPosition(anchor, p, mAnchorXoff, mAnchorYoff);
update(p.x, p.y, -1, -1, true);
}
}
};
private int mAnchorXoff, mAnchorYoff;
/**
* <p>Create a new empty, non focusable popup window of dimension (0,0).</p>
*
* <p>The popup does provide a background.</p>
*/
public PopupWindow(Context context) {
this(context, null);
}
/**
* <p>Create a new empty, non focusable popup window of dimension (0,0).</p>
*
* <p>The popup does provide a background.</p>
*/
public PopupWindow(Context context, AttributeSet attrs) {
this(context, attrs, com.android.internal.R.attr.popupWindowStyle);
}
/**
* <p>Create a new empty, non focusable popup window of dimension (0,0).</p>
*
* <p>The popup does provide a background.</p>
*/
public PopupWindow(Context context, AttributeSet attrs, int defStyle) {
mContext = context;
mWindowManager = (WindowManager)context.getSystemService(
Context.WINDOW_SERVICE);
TypedArray a =
context.obtainStyledAttributes(
attrs, com.android.internal.R.styleable.PopupWindow, defStyle, 0);
mBackground = a.getDrawable(R.styleable.PopupWindow_popupBackground);
// If this is a StateListDrawable, try to find and store the drawable to be
// used when the drop-down is placed above its anchor view, and the one to be
// used when the drop-down is placed below its anchor view. We extract
// the drawables ourselves to work around a problem with using refreshDrawableState
// that it will take into account the padding of all drawables specified in a
// StateListDrawable, thus adding superfluous padding to drop-down views.
//
// We assume a StateListDrawable will have a drawable for ABOVE_ANCHOR_STATE_SET and
// at least one other drawable, intended for the 'below-anchor state'.
if (mBackground instanceof StateListDrawable) {
StateListDrawable background = (StateListDrawable) mBackground;
// Find the above-anchor view - this one's easy, it should be labeled as such.
int aboveAnchorStateIndex = background.getStateDrawableIndex(ABOVE_ANCHOR_STATE_SET);
// Now, for the below-anchor view, look for any other drawable specified in the
// StateListDrawable which is not for the above-anchor state and use that.
int count = background.getStateCount();
int belowAnchorStateIndex = -1;
for (int i = 0; i < count; i++) {
if (i != aboveAnchorStateIndex) {
belowAnchorStateIndex = i;
break;
}
}
// Store the drawables we found, if we found them. Otherwise, set them both
// to null so that we'll just use refreshDrawableState.
if (aboveAnchorStateIndex != -1 && belowAnchorStateIndex != -1) {
mAboveAnchorBackgroundDrawable = background.getStateDrawable(aboveAnchorStateIndex);
mBelowAnchorBackgroundDrawable = background.getStateDrawable(belowAnchorStateIndex);
} else {
mBelowAnchorBackgroundDrawable = null;
mAboveAnchorBackgroundDrawable = null;
}
}
a.recycle();
}
/**
* <p>Create a new empty, non focusable popup window of dimension (0,0).</p>
*
* <p>The popup does not provide any background. This should be handled
* by the content view.</p>
*/
public PopupWindow() {
this(null, 0, 0);
}
/**
* <p>Create a new non focusable popup window which can display the
* <tt>contentView</tt>. The dimension of the window are (0,0).</p>
*
* <p>The popup does not provide any background. This should be handled
* by the content view.</p>
*
* @param contentView the popup's content
*/
public PopupWindow(View contentView) {
this(contentView, 0, 0);
}
/**
* <p>Create a new empty, non focusable popup window. The dimension of the
* window must be passed to this constructor.</p>
*
* <p>The popup does not provide any background. This should be handled
* by the content view.</p>
*
* @param width the popup's width
* @param height the popup's height
*/
public PopupWindow(int width, int height) {
this(null, width, height);
}
/**
* <p>Create a new non focusable popup window which can display the
* <tt>contentView</tt>. The dimension of the window must be passed to
* this constructor.</p>
*
* <p>The popup does not provide any background. This should be handled
* by the content view.</p>
*
* @param contentView the popup's content
* @param width the popup's width
* @param height the popup's height
*/
public PopupWindow(View contentView, int width, int height) {
this(contentView, width, height, false);
}
/**
* <p>Create a new popup window which can display the <tt>contentView</tt>.
* The dimension of the window must be passed to this constructor.</p>
*
* <p>The popup does not provide any background. This should be handled
* by the content view.</p>
*
* @param contentView the popup's content
* @param width the popup's width
* @param height the popup's height
* @param focusable true if the popup can be focused, false otherwise
*/
public PopupWindow(View contentView, int width, int height,
boolean focusable) {
mContext = contentView.getContext();
mWindowManager = (WindowManager)mContext.getSystemService(
Context.WINDOW_SERVICE);
setContentView(contentView);
setWidth(width);
setHeight(height);
setFocusable(focusable);
}
/**
* <p>Return the drawable used as the popup window's background.</p>
*
* @return the background drawable or null
*/
public Drawable getBackground() {
return mBackground;
}
/**
* <p>Change the background drawable for this popup window. The background
* can be set to null.</p>
*
* @param background the popup's background
*/
public void setBackgroundDrawable(Drawable background) {
mBackground = background;
}
/**
* <p>Return the animation style to use the popup appears and disappears</p>
*
* @return the animation style to use the popup appears and disappears
*/
public int getAnimationStyle() {
return mAnimationStyle;
}
/**
* Set the flag on popup to ignore cheek press eventt; by default this flag
* is set to false
* which means the pop wont ignore cheek press dispatch events.
*
* <p>If the popup is showing, calling this method will take effect only
* the next time the popup is shown or through a manual call to one of
* the {@link #update()} methods.</p>
*
* @see #update()
*/
public void setIgnoreCheekPress() {
mIgnoreCheekPress = true;
}
/**
* <p>Change the animation style resource for this popup.</p>
*
* <p>If the popup is showing, calling this method will take effect only
* the next time the popup is shown or through a manual call to one of
* the {@link #update()} methods.</p>
*
* @param animationStyle animation style to use when the popup appears
* and disappears. Set to -1 for the default animation, 0 for no
* animation, or a resource identifier for an explicit animation.
*
* @see #update()
*/
public void setAnimationStyle(int animationStyle) {
mAnimationStyle = animationStyle;
}
/**
* <p>Return the view used as the content of the popup window.</p>
*
* @return a {@link android.view.View} representing the popup's content
*
* @see #setContentView(android.view.View)
*/
public View getContentView() {
return mContentView;
}
/**
* <p>Change the popup's content. The content is represented by an instance
* of {@link android.view.View}.</p>
*
* <p>This method has no effect if called when the popup is showing. To
* apply it while a popup is showing, call </p>
*
* @param contentView the new content for the popup
*
* @see #getContentView()
* @see #isShowing()
*/
public void setContentView(View contentView) {
if (isShowing()) {
return;
}
mContentView = contentView;
}
/**
* Set a callback for all touch events being dispatched to the popup
* window.
*/
public void setTouchInterceptor(OnTouchListener l) {
mTouchInterceptor = l;
}
/**
* <p>Indicate whether the popup window can grab the focus.</p>
*
* @return true if the popup is focusable, false otherwise
*
* @see #setFocusable(boolean)
*/
public boolean isFocusable() {
return mFocusable;
}
/**
* <p>Changes the focusability of the popup window. When focusable, the
* window will grab the focus from the current focused widget if the popup
* contains a focusable {@link android.view.View}. By default a popup
* window is not focusable.</p>
*
* <p>If the popup is showing, calling this method will take effect only
* the next time the popup is shown or through a manual call to one of
* the {@link #update()} methods.</p>
*
* @param focusable true if the popup should grab focus, false otherwise.
*
* @see #isFocusable()
* @see #isShowing()
* @see #update()
*/
public void setFocusable(boolean focusable) {
mFocusable = focusable;
}
/**
* Return the current value in {@link #setInputMethodMode(int)}.
*
* @see #setInputMethodMode(int)
*/
public int getInputMethodMode() {
return mInputMethodMode;
}
/**
* Control how the popup operates with an input method: one of
* {@link #INPUT_METHOD_FROM_FOCUSABLE}, {@link #INPUT_METHOD_NEEDED},
* or {@link #INPUT_METHOD_NOT_NEEDED}.
*
* <p>If the popup is showing, calling this method will take effect only
* the next time the popup is shown or through a manual call to one of
* the {@link #update()} methods.</p>
*
* @see #getInputMethodMode()
* @see #update()
*/
public void setInputMethodMode(int mode) {
mInputMethodMode = mode;
}
/**
* <p>Indicates whether the popup window receives touch events.</p>
*
* @return true if the popup is touchable, false otherwise
*
* @see #setTouchable(boolean)
*/
public boolean isTouchable() {
return mTouchable;
}
/**
* <p>Changes the touchability of the popup window. When touchable, the
* window will receive touch events, otherwise touch events will go to the
* window below it. By default the window is touchable.</p>
*
* <p>If the popup is showing, calling this method will take effect only
* the next time the popup is shown or through a manual call to one of
* the {@link #update()} methods.</p>
*
* @param touchable true if the popup should receive touch events, false otherwise
*
* @see #isTouchable()
* @see #isShowing()
* @see #update()
*/
public void setTouchable(boolean touchable) {
mTouchable = touchable;
}
/**
* <p>Indicates whether the popup window will be informed of touch events
* outside of its window.</p>
*
* @return true if the popup is outside touchable, false otherwise
*
* @see #setOutsideTouchable(boolean)
*/
public boolean isOutsideTouchable() {
return mOutsideTouchable;
}
/**
* <p>Controls whether the pop-up will be informed of touch events outside
* of its window. This only makes sense for pop-ups that are touchable
* but not focusable, which means touches outside of the window will
* be delivered to the window behind. The default is false.</p>
*
* <p>If the popup is showing, calling this method will take effect only
* the next time the popup is shown or through a manual call to one of
* the {@link #update()} methods.</p>
*
* @param touchable true if the popup should receive outside
* touch events, false otherwise
*
* @see #isOutsideTouchable()
* @see #isShowing()
* @see #update()
*/
public void setOutsideTouchable(boolean touchable) {
mOutsideTouchable = touchable;
}
/**
* <p>Indicates whether clipping of the popup window is enabled.</p>
*
* @return true if the clipping is enabled, false otherwise
*
* @see #setClippingEnabled(boolean)
*/
public boolean isClippingEnabled() {
return mClippingEnabled;
}
/**
* <p>Allows the popup window to extend beyond the bounds of the screen. By default the
* window is clipped to the screen boundaries. Setting this to false will allow windows to be
* accurately positioned.</p>
*
* <p>If the popup is showing, calling this method will take effect only
* the next time the popup is shown or through a manual call to one of
* the {@link #update()} methods.</p>
*
* @param enabled false if the window should be allowed to extend outside of the screen
* @see #isShowing()
* @see #isClippingEnabled()
* @see #update()
*/
public void setClippingEnabled(boolean enabled) {
mClippingEnabled = enabled;
}
/**
* <p>Change the width and height measure specs that are given to the
* window manager by the popup. By default these are 0, meaning that
* the current width or height is requested as an explicit size from
* the window manager. You can supply
* {@link ViewGroup.LayoutParams#WRAP_CONTENT} or
* {@link ViewGroup.LayoutParams#FILL_PARENT} to have that measure
* spec supplied instead, replacing the absolute width and height that
* has been set in the popup.</p>
*
* <p>If the popup is showing, calling this method will take effect only
* the next time the popup is shown.</p>
*
* @param widthSpec an explicit width measure spec mode, either
* {@link ViewGroup.LayoutParams#WRAP_CONTENT},
* {@link ViewGroup.LayoutParams#FILL_PARENT}, or 0 to use the absolute
* width.
* @param heightSpec an explicit height measure spec mode, either
* {@link ViewGroup.LayoutParams#WRAP_CONTENT},
* {@link ViewGroup.LayoutParams#FILL_PARENT}, or 0 to use the absolute
* height.
*/
public void setWindowLayoutMode(int widthSpec, int heightSpec) {
mWidthMode = widthSpec;
mHeightMode = heightSpec;
}
/**
* <p>Return this popup's height MeasureSpec</p>
*
* @return the height MeasureSpec of the popup
*
* @see #setHeight(int)
*/
public int getHeight() {
return mHeight;
}
/**
* <p>Change the popup's height MeasureSpec</p>
*
* <p>If the popup is showing, calling this method will take effect only
* the next time the popup is shown.</p>
*
* @param height the height MeasureSpec of the popup
*
* @see #getHeight()
* @see #isShowing()
*/
public void setHeight(int height) {
mHeight = height;
}
/**
* <p>Return this popup's width MeasureSpec</p>
*
* @return the width MeasureSpec of the popup
*
* @see #setWidth(int)
*/
public int getWidth() {
return mWidth;
}
/**
* <p>Change the popup's width MeasureSpec</p>
*
* <p>If the popup is showing, calling this method will take effect only
* the next time the popup is shown.</p>
*
* @param width the width MeasureSpec of the popup
*
* @see #getWidth()
* @see #isShowing()
*/
public void setWidth(int width) {
mWidth = width;
}
/**
* <p>Indicate whether this popup window is showing on screen.</p>
*
* @return true if the popup is showing, false otherwise
*/
public boolean isShowing() {
return mIsShowing;
}
/**
* <p>
* Display the content view in a popup window at the specified location. If the popup window
* cannot fit on screen, it will be clipped. See {@link android.view.WindowManager.LayoutParams}
* for more information on how gravity and the x and y parameters are related. Specifying
* a gravity of {@link android.view.Gravity#NO_GRAVITY} is similar to specifying
* <code>Gravity.LEFT | Gravity.TOP</code>.
* </p>
*
* @param parent a parent view to get the {@link android.view.View#getWindowToken()} token from
* @param gravity the gravity which controls the placement of the popup window
* @param x the popup's x location offset
* @param y the popup's y location offset
*/
public void showAtLocation(View parent, int gravity, int x, int y) {
if (isShowing() || mContentView == null) {
return;
}
unregisterForScrollChanged();
mIsShowing = true;
mIsDropdown = false;
WindowManager.LayoutParams p = createPopupLayout(parent.getWindowToken());
p.windowAnimations = computeAnimationResource();
preparePopup(p);
if (gravity == Gravity.NO_GRAVITY) {
gravity = Gravity.TOP | Gravity.LEFT;
}
p.gravity = gravity;
p.x = x;
p.y = y;
invokePopup(p);
}
/**
* <p>Display the content view in a popup window anchored to the bottom-left
* corner of the anchor view. If there is not enough room on screen to show
* the popup in its entirety, this method tries to find a parent scroll
* view to scroll. If no parent scroll view can be scrolled, the bottom-left
* corner of the popup is pinned at the top left corner of the anchor view.</p>
*
* @param anchor the view on which to pin the popup window
*
* @see #dismiss()
*/
public void showAsDropDown(View anchor) {
showAsDropDown(anchor, 0, 0);
}
/**
* <p>Display the content view in a popup window anchored to the bottom-left
* corner of the anchor view offset by the specified x and y coordinates.
* If there is not enough room on screen to show
* the popup in its entirety, this method tries to find a parent scroll
* view to scroll. If no parent scroll view can be scrolled, the bottom-left
* corner of the popup is pinned at the top left corner of the anchor view.</p>
* <p>If the view later scrolls to move <code>anchor</code> to a different
* location, the popup will be moved correspondingly.</p>
*
* @param anchor the view on which to pin the popup window
*
* @see #dismiss()
*/
public void showAsDropDown(View anchor, int xoff, int yoff) {
if (isShowing() || mContentView == null) {
return;
}
registerForScrollChanged(anchor, xoff, yoff);
mIsShowing = true;
mIsDropdown = true;
WindowManager.LayoutParams p = createPopupLayout(anchor.getWindowToken());
preparePopup(p);
mAboveAnchor = findDropDownPosition(anchor, p, xoff, yoff);
if (mBackground != null) {
// If the background drawable provided was a StateListDrawable with above-anchor
// and below-anchor states, use those. Otherwise rely on refreshDrawableState to
// do the job.
if (mAboveAnchorBackgroundDrawable != null) {
if (mAboveAnchor) {
mPopupView.setBackgroundDrawable(mAboveAnchorBackgroundDrawable);
} else {
mPopupView.setBackgroundDrawable(mBelowAnchorBackgroundDrawable);
}
} else {
mPopupView.refreshDrawableState();
}
}
if (mHeightMode < 0) p.height = mLastHeight = mHeightMode;
if (mWidthMode < 0) p.width = mLastWidth = mWidthMode;
p.windowAnimations = computeAnimationResource();
invokePopup(p);
}
/**
* Indicates whether the popup is showing above (the y coordinate of the popup's bottom
* is less than the y coordinate of the anchor) or below the anchor view (the y coordinate
* of the popup is greater than y coordinate of the anchor's bottom).
*
* The value returned
* by this method is meaningful only after {@link #showAsDropDown(android.view.View)}
* or {@link #showAsDropDown(android.view.View, int, int)} was invoked.
*
* @return True if this popup is showing above the anchor view, false otherwise.
*/
public boolean isAboveAnchor() {
return mAboveAnchor;
}
/**
* <p>Prepare the popup by embedding in into a new ViewGroup if the
* background drawable is not null. If embedding is required, the layout
* parameters' height is mnodified to take into account the background's
* padding.</p>
*
* @param p the layout parameters of the popup's content view
*/
private void preparePopup(WindowManager.LayoutParams p) {
if (mBackground != null) {
final ViewGroup.LayoutParams layoutParams = mContentView.getLayoutParams();
int height = ViewGroup.LayoutParams.FILL_PARENT;
if (layoutParams != null &&
layoutParams.height == ViewGroup.LayoutParams.WRAP_CONTENT) {
height = ViewGroup.LayoutParams.WRAP_CONTENT;
}
// when a background is available, we embed the content view
// within another view that owns the background drawable
PopupViewContainer popupViewContainer = new PopupViewContainer(mContext);
PopupViewContainer.LayoutParams listParams = new PopupViewContainer.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, height
);
popupViewContainer.setBackgroundDrawable(mBackground);
popupViewContainer.addView(mContentView, listParams);
mPopupView = popupViewContainer;
} else {
mPopupView = mContentView;
}
mPopupWidth = p.width;
mPopupHeight = p.height;
}
/**
* <p>Invoke the popup window by adding the content view to the window
* manager.</p>
*
* <p>The content view must be non-null when this method is invoked.</p>
*
* @param p the layout parameters of the popup's content view
*/
private void invokePopup(WindowManager.LayoutParams p) {
mWindowManager.addView(mPopupView, p);
}
/**
* <p>Generate the layout parameters for the popup window.</p>
*
* @param token the window token used to bind the popup's window
*
* @return the layout parameters to pass to the window manager
*/
private WindowManager.LayoutParams createPopupLayout(IBinder token) {
// generates the layout parameters for the drop down
// we want a fixed size view located at the bottom left of the anchor
WindowManager.LayoutParams p = new WindowManager.LayoutParams();
// these gravity settings put the view at the top left corner of the
// screen. The view is then positioned to the appropriate location
// by setting the x and y offsets to match the anchor's bottom
// left corner
p.gravity = Gravity.LEFT | Gravity.TOP;
p.width = mLastWidth = mWidth;
p.height = mLastHeight = mHeight;
if (mBackground != null) {
p.format = mBackground.getOpacity();
} else {
p.format = PixelFormat.TRANSLUCENT;
}
p.flags = computeFlags(p.flags);
p.type = WindowManager.LayoutParams.TYPE_APPLICATION_PANEL;
p.token = token;
p.setTitle("PopupWindow:" + Integer.toHexString(hashCode()));
return p;
}
private int computeFlags(int curFlags) {
curFlags &= ~(
WindowManager.LayoutParams.FLAG_IGNORE_CHEEK_PRESSES |
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE |
WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH |
WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS |
WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);
if(mIgnoreCheekPress) {
curFlags |= WindowManager.LayoutParams.FLAG_IGNORE_CHEEK_PRESSES;
}
if (!mFocusable) {
curFlags |= WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
if (mInputMethodMode == INPUT_METHOD_NEEDED) {
curFlags |= WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM;
}
} else if (mInputMethodMode == INPUT_METHOD_NOT_NEEDED) {
curFlags |= WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM;
}
if (!mTouchable) {
curFlags |= WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
}
if (mOutsideTouchable) {
curFlags |= WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH;
}
if (!mClippingEnabled) {
curFlags |= WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;
}
return curFlags;
}
private int computeAnimationResource() {
if (mAnimationStyle == -1) {
if (mIsDropdown) {
return mAboveAnchor
? com.android.internal.R.style.Animation_DropDownUp
: com.android.internal.R.style.Animation_DropDownDown;
}
return 0;
}
return mAnimationStyle;
}
/**
* <p>Positions the popup window on screen. When the popup window is too
* tall to fit under the anchor, a parent scroll view is seeked and scrolled
* up to reclaim space. If scrolling is not possible or not enough, the
* popup window gets moved on top of the anchor.</p>
*
* <p>The height must have been set on the layout parameters prior to
* calling this method.</p>
*
* @param anchor the view on which the popup window must be anchored
* @param p the layout parameters used to display the drop down
*
* @return true if the popup is translated upwards to fit on screen
*/
private boolean findDropDownPosition(View anchor, WindowManager.LayoutParams p,
int xoff, int yoff) {
anchor.getLocationInWindow(mDrawingLocation);
p.x = mDrawingLocation[0] + xoff;
p.y = mDrawingLocation[1] + anchor.getMeasuredHeight() + yoff;
boolean onTop = false;
p.gravity = Gravity.LEFT | Gravity.TOP;
anchor.getLocationOnScreen(mScreenLocation);
final Rect displayFrame = new Rect();
anchor.getWindowVisibleDisplayFrame(displayFrame);
final View root = anchor.getRootView();
if (p.y + mPopupHeight > displayFrame.bottom || p.x + mPopupWidth - root.getWidth() > 0) {
// if the drop down disappears at the bottom of the screen. we try to
// scroll a parent scrollview or move the drop down back up on top of
// the edit box
int scrollX = anchor.getScrollX();
int scrollY = anchor.getScrollY();
Rect r = new Rect(scrollX, scrollY, scrollX + mPopupWidth,
scrollY + mPopupHeight + anchor.getMeasuredHeight());
anchor.requestRectangleOnScreen(r, true);
// now we re-evaluate the space available, and decide from that
// whether the pop-up will go above or below the anchor.
anchor.getLocationInWindow(mDrawingLocation);
p.x = mDrawingLocation[0] + xoff;
p.y = mDrawingLocation[1] + anchor.getMeasuredHeight() + yoff;
// determine whether there is more space above or below the anchor
anchor.getLocationOnScreen(mScreenLocation);
onTop = (displayFrame.bottom - mScreenLocation[1] - anchor.getMeasuredHeight() - yoff) <
(mScreenLocation[1] - yoff - displayFrame.top);
if (onTop) {
p.gravity = Gravity.LEFT | Gravity.BOTTOM;
p.y = root.getHeight() - mDrawingLocation[1] + yoff;
} else {
p.y = mDrawingLocation[1] + anchor.getMeasuredHeight() + yoff;
}
}
p.gravity |= Gravity.DISPLAY_CLIP_VERTICAL;
return onTop;
}
/**
* Returns the maximum height that is available for the popup to be
* completely shown. It is recommended that this height be the maximum for
* the popup's height, otherwise it is possible that the popup will be
* clipped.
*
* @param anchor The view on which the popup window must be anchored.
* @return The maximum available height for the popup to be completely
* shown.
*/
public int getMaxAvailableHeight(View anchor) {
return getMaxAvailableHeight(anchor, 0);
}
/**
* Returns the maximum height that is available for the popup to be
* completely shown. It is recommended that this height be the maximum for
* the popup's height, otherwise it is possible that the popup will be
* clipped.
*
* @param anchor The view on which the popup window must be anchored.
* @param yOffset y offset from the view's bottom edge
* @return The maximum available height for the popup to be completely
* shown.
*/
public int getMaxAvailableHeight(View anchor, int yOffset) {
final Rect displayFrame = new Rect();
anchor.getWindowVisibleDisplayFrame(displayFrame);
final int[] anchorPos = mDrawingLocation;
anchor.getLocationOnScreen(anchorPos);
final int distanceToBottom = displayFrame.bottom -
(anchorPos[1] + anchor.getHeight()) - yOffset;
final int distanceToTop = anchorPos[1] - displayFrame.top + yOffset;
// anchorPos[1] is distance from anchor to top of screen
int returnedHeight = Math.max(distanceToBottom, distanceToTop);
if (mBackground != null) {
mBackground.getPadding(mTempRect);
returnedHeight -= mTempRect.top + mTempRect.bottom;
}
return returnedHeight;
}
/**
* <p>Dispose of the popup window. This method can be invoked only after
* {@link #showAsDropDown(android.view.View)} has been executed. Failing that, calling
* this method will have no effect.</p>
*
* @see #showAsDropDown(android.view.View)
*/
public void dismiss() {
if (isShowing() && mPopupView != null) {
unregisterForScrollChanged();
mWindowManager.removeView(mPopupView);
if (mPopupView != mContentView && mPopupView instanceof ViewGroup) {
((ViewGroup) mPopupView).removeView(mContentView);
}
mPopupView = null;
mIsShowing = false;
if (mOnDismissListener != null) {
mOnDismissListener.onDismiss();
}
}
}
/**
* Sets the listener to be called when the window is dismissed.
*
* @param onDismissListener The listener.
*/
public void setOnDismissListener(OnDismissListener onDismissListener) {
mOnDismissListener = onDismissListener;
}
/**
* Updates the state of the popup window, if it is currently being displayed,
* from the currently set state. This include:
* {@link #setClippingEnabled(boolean)}, {@link #setFocusable(boolean)},
* {@link #setIgnoreCheekPress()}, {@link #setInputMethodMode(int)},
* {@link #setTouchable(boolean)}, and {@link #setAnimationStyle(int)}.
*/
public void update() {
if (!isShowing() || mContentView == null) {
return;
}
WindowManager.LayoutParams p = (WindowManager.LayoutParams)
mPopupView.getLayoutParams();
boolean update = false;
final int newAnim = computeAnimationResource();
if (newAnim != p.windowAnimations) {
p.windowAnimations = newAnim;
update = true;
}
final int newFlags = computeFlags(p.flags);
if (newFlags != p.flags) {
p.flags = newFlags;
update = true;
}
if (update) {
mWindowManager.updateViewLayout(mPopupView, p);
}
}
/**
* <p>Updates the position and the dimension of the popup window. Width and
* height can be set to -1 to update location only. Calling this function
* also updates the window with the current popup state as
* described for {@link #update()}.</p>
*
* @param x the new x location
* @param y the new y location
* @param width the new width, can be -1 to ignore
* @param height the new height, can be -1 to ignore
*/
public void update(int x, int y, int width, int height) {
update(x, y, width, height, false);
}
/**
* <p>Updates the position and the dimension of the popup window. Width and
* height can be set to -1 to update location only. Calling this function
* also updates the window with the current popup state as
* described for {@link #update()}.</p>
*
* @param x the new x location
* @param y the new y location
* @param width the new width, can be -1 to ignore
* @param height the new height, can be -1 to ignore
* @param force reposition the window even if the specified position
* already seems to correspond to the LayoutParams
*/
public void update(int x, int y, int width, int height, boolean force) {
if (width != -1) {
mLastWidth = width;
setWidth(width);
}
if (height != -1) {
mLastHeight = height;
setHeight(height);
}
if (!isShowing() || mContentView == null) {
return;
}
WindowManager.LayoutParams p = (WindowManager.LayoutParams)
mPopupView.getLayoutParams();
boolean update = force;
final int finalWidth = mWidthMode < 0 ? mWidthMode : mLastWidth;
if (width != -1 && p.width != finalWidth) {
p.width = mLastWidth = finalWidth;
update = true;
}
final int finalHeight = mHeightMode < 0 ? mHeightMode : mLastHeight;
if (height != -1 && p.height != finalHeight) {
p.height = mLastHeight = finalHeight;
update = true;
}
if (p.x != x) {
p.x = x;
update = true;
}
if (p.y != y) {
p.y = y;
update = true;
}
final int newAnim = computeAnimationResource();
if (newAnim != p.windowAnimations) {
p.windowAnimations = newAnim;
update = true;
}
final int newFlags = computeFlags(p.flags);
if (newFlags != p.flags) {
p.flags = newFlags;
update = true;
}
if (update) {
mWindowManager.updateViewLayout(mPopupView, p);
}
}
/**
* <p>Updates the position and the dimension of the popup window. Calling this
* function also updates the window with the current popup state as described
* for {@link #update()}.</p>
*
* @param anchor the popup's anchor view
* @param width the new width, can be -1 to ignore
* @param height the new height, can be -1 to ignore
*/
public void update(View anchor, int width, int height) {
update(anchor, false, 0, 0, true, width, height);
}
/**
* <p>Updates the position and the dimension of the popup window. Width and
* height can be set to -1 to update location only. Calling this function
* also updates the window with the current popup state as
* described for {@link #update()}.</p>
* <p>If the view later scrolls to move <code>anchor</code> to a different
* location, the popup will be moved correspondingly.</p>
*
* @param anchor the popup's anchor view
* @param xoff x offset from the view's left edge
* @param yoff y offset from the view's bottom edge
* @param width the new width, can be -1 to ignore
* @param height the new height, can be -1 to ignore
*/
public void update(View anchor, int xoff, int yoff, int width, int height) {
update(anchor, true, xoff, yoff, true, width, height);
}
private void update(View anchor, boolean updateLocation, int xoff, int yoff,
boolean updateDimension, int width, int height) {
if (!isShowing() || mContentView == null) {
return;
}
WeakReference<View> oldAnchor = mAnchor;
if (oldAnchor == null || oldAnchor.get() != anchor ||
(updateLocation && (mAnchorXoff != xoff || mAnchorYoff != yoff))) {
registerForScrollChanged(anchor, xoff, yoff);
}
WindowManager.LayoutParams p = (WindowManager.LayoutParams)
mPopupView.getLayoutParams();
if (updateDimension) {
if (width == -1) {
width = mPopupWidth;
} else {
mPopupWidth = width;
}
if (height == -1) {
height = mPopupHeight;
} else {
mPopupHeight = height;
}
}
if (updateLocation) {
mAboveAnchor = findDropDownPosition(anchor, p, xoff, yoff);
} else {
mAboveAnchor = findDropDownPosition(anchor, p, mAnchorXoff, mAnchorYoff);
}
update(p.x, p.y, width, height);
}
/**
* Listener that is called when this popup window is dismissed.
*/
public interface OnDismissListener {
/**
* Called when this popup window is dismissed.
*/
public void onDismiss();
}
private void unregisterForScrollChanged() {
WeakReference<View> anchorRef = mAnchor;
View anchor = null;
if (anchorRef != null) {
anchor = anchorRef.get();
}
if (anchor != null) {
ViewTreeObserver vto = anchor.getViewTreeObserver();
vto.removeOnScrollChangedListener(mOnScrollChangedListener);
}
mAnchor = null;
}
private void registerForScrollChanged(View anchor, int xoff, int yoff) {
unregisterForScrollChanged();
mAnchor = new WeakReference<View>(anchor);
ViewTreeObserver vto = anchor.getViewTreeObserver();
if (vto != null) {
vto.addOnScrollChangedListener(mOnScrollChangedListener);
}
mAnchorXoff = xoff;
mAnchorYoff = yoff;
}
private class PopupViewContainer extends FrameLayout {
public PopupViewContainer(Context context) {
super(context);
}
@Override
protected int[] onCreateDrawableState(int extraSpace) {
if (mAboveAnchor) {
// 1 more needed for the above anchor state
final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
View.mergeDrawableStates(drawableState, ABOVE_ANCHOR_STATE_SET);
return drawableState;
} else {
return super.onCreateDrawableState(extraSpace);
}
}
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
dismiss();
return true;
} else {
return super.dispatchKeyEvent(event);
}
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
if (mTouchInterceptor != null && mTouchInterceptor.onTouch(this, ev)) {
return true;
}
return super.dispatchTouchEvent(ev);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
final int x = (int) event.getX();
final int y = (int) event.getY();
if ((event.getAction() == MotionEvent.ACTION_DOWN)
&& ((x < 0) || (x >= getWidth()) || (y < 0) || (y >= getHeight()))) {
dismiss();
return true;
} else if (event.getAction() == MotionEvent.ACTION_OUTSIDE) {
dismiss();
return true;
} else {
return super.onTouchEvent(event);
}
}
}
}
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