package com.android.launcher3;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.animation.PropertyValuesHolder;
import android.animation.ValueAnimator;
import android.animation.ValueAnimator.AnimatorUpdateListener;
import android.appwidget.AppWidgetHostView;
import android.appwidget.AppWidgetProviderInfo;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Rect;
import android.view.Gravity;
import android.widget.FrameLayout;
import android.widget.ImageView;
public class AppWidgetResizeFrame extends FrameLayout {
private static final int SNAP_DURATION = 150;
private static final float DIMMED_HANDLE_ALPHA = 0f;
private static final float RESIZE_THRESHOLD = 0.66f;
private static Rect sTmpRect = new Rect();
private final Launcher mLauncher;
private final LauncherAppWidgetHostView mWidgetView;
private final CellLayout mCellLayout;
private final DragLayer mDragLayer;
private final ImageView mLeftHandle;
private final ImageView mRightHandle;
private final ImageView mTopHandle;
private final ImageView mBottomHandle;
private final Rect mWidgetPadding;
private final int mBackgroundPadding;
private final int mTouchTargetWidth;
private final int[] mDirectionVector = new int[2];
private final int[] mLastDirectionVector = new int[2];
private final int[] mTmpPt = new int[2];
private boolean mLeftBorderActive;
private boolean mRightBorderActive;
private boolean mTopBorderActive;
private boolean mBottomBorderActive;
private int mBaselineWidth;
private int mBaselineHeight;
private int mBaselineX;
private int mBaselineY;
private int mResizeMode;
private int mRunningHInc;
private int mRunningVInc;
private int mMinHSpan;
private int mMinVSpan;
private int mDeltaX;
private int mDeltaY;
private int mDeltaXAddOn;
private int mDeltaYAddOn;
private int mTopTouchRegionAdjustment = 0;
private int mBottomTouchRegionAdjustment = 0;
public AppWidgetResizeFrame(Context context,
LauncherAppWidgetHostView widgetView, CellLayout cellLayout, DragLayer dragLayer) {
super(context);
mLauncher = (Launcher) context;
mCellLayout = cellLayout;
mWidgetView = widgetView;
LauncherAppWidgetProviderInfo info = (LauncherAppWidgetProviderInfo)
widgetView.getAppWidgetInfo();
mResizeMode = info.resizeMode;
mDragLayer = dragLayer;
mMinHSpan = info.minSpanX;
mMinVSpan = info.minSpanY;
setBackgroundResource(R.drawable.widget_resize_shadow);
setForeground(getResources().getDrawable(R.drawable.widget_resize_frame));
setPadding(0, 0, 0, 0);
final int handleMargin = getResources().getDimensionPixelSize(R.dimen.widget_handle_margin);
LayoutParams lp;
mLeftHandle = new ImageView(context);
mLeftHandle.setImageResource(R.drawable.ic_widget_resize_handle);
lp = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT,
Gravity.LEFT | Gravity.CENTER_VERTICAL);
lp.leftMargin = handleMargin;
addView(mLeftHandle, lp);
mRightHandle = new ImageView(context);
mRightHandle.setImageResource(R.drawable.ic_widget_resize_handle);
lp = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT,
Gravity.RIGHT | Gravity.CENTER_VERTICAL);
lp.rightMargin = handleMargin;
addView(mRightHandle, lp);
mTopHandle = new ImageView(context);
mTopHandle.setImageResource(R.drawable.ic_widget_resize_handle);
lp = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT,
Gravity.CENTER_HORIZONTAL | Gravity.TOP);
lp.topMargin = handleMargin;
addView(mTopHandle, lp);
mBottomHandle = new ImageView(context);
mBottomHandle.setImageResource(R.drawable.ic_widget_resize_handle);
lp = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT,
Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM);
lp.bottomMargin = handleMargin;
addView(mBottomHandle, lp);
if (!info.isCustomWidget) {
mWidgetPadding = AppWidgetHostView.getDefaultPaddingForWidget(context,
widgetView.getAppWidgetInfo().provider, null);
} else {
Resources r = context.getResources();
int padding = r.getDimensionPixelSize(R.dimen.default_widget_padding);
mWidgetPadding = new Rect(padding, padding, padding, padding);
}
if (mResizeMode == AppWidgetProviderInfo.RESIZE_HORIZONTAL) {
mTopHandle.setVisibility(GONE);
mBottomHandle.setVisibility(GONE);
} else if (mResizeMode == AppWidgetProviderInfo.RESIZE_VERTICAL) {
mLeftHandle.setVisibility(GONE);
mRightHandle.setVisibility(GONE);
}
mBackgroundPadding = getResources()
.getDimensionPixelSize(R.dimen.resize_frame_background_padding);
mTouchTargetWidth = 2 * mBackgroundPadding;
// When we create the resize frame, we first mark all cells as unoccupied. The appropriate
// cells (same if not resized, or different) will be marked as occupied when the resize
// frame is dismissed.
mCellLayout.markCellsAsUnoccupiedForView(mWidgetView);
}
public boolean beginResizeIfPointInRegion(int x, int y) {
boolean horizontalActive = (mResizeMode & AppWidgetProviderInfo.RESIZE_HORIZONTAL) != 0;
boolean verticalActive = (mResizeMode & AppWidgetProviderInfo.RESIZE_VERTICAL) != 0;
mLeftBorderActive = (x < mTouchTargetWidth) && horizontalActive;
mRightBorderActive = (x > getWidth() - mTouchTargetWidth) && horizontalActive;
mTopBorderActive = (y < mTouchTargetWidth + mTopTouchRegionAdjustment) && verticalActive;
mBottomBorderActive = (y > getHeight() - mTouchTargetWidth + mBottomTouchRegionAdjustment)
&& verticalActive;
boolean anyBordersActive = mLeftBorderActive || mRightBorderActive
|| mTopBorderActive || mBottomBorderActive;
mBaselineWidth = getMeasuredWidth();
mBaselineHeight = getMeasuredHeight();
mBaselineX = getLeft();
mBaselineY = getTop();
if (anyBordersActive) {
mLeftHandle.setAlpha(mLeftBorderActive ? 1.0f : DIMMED_HANDLE_ALPHA);
mRightHandle.setAlpha(mRightBorderActive ? 1.0f :DIMMED_HANDLE_ALPHA);
mTopHandle.setAlpha(mTopBorderActive ? 1.0f : DIMMED_HANDLE_ALPHA);
mBottomHandle.setAlpha(mBottomBorderActive ? 1.0f : DIMMED_HANDLE_ALPHA);
}
return anyBordersActive;
}
/**
* Here we bound the deltas such that the frame cannot be stretched beyond the extents
* of the CellLayout, and such that the frame's borders can't cross.
*/
public void updateDeltas(int deltaX, int deltaY) {
if (mLeftBorderActive) {
mDeltaX = Math.max(-mBaselineX, deltaX);
mDeltaX = Math.min(mBaselineWidth - 2 * mTouchTargetWidth, mDeltaX);
} else if (mRightBorderActive) {
mDeltaX = Math.min(mDragLayer.getWidth() - (mBaselineX + mBaselineWidth), deltaX);
mDeltaX = Math.max(-mBaselineWidth + 2 * mTouchTargetWidth, mDeltaX);
}
if (mTopBorderActive) {
mDeltaY = Math.max(-mBaselineY, deltaY);
mDeltaY = Math.min(mBaselineHeight - 2 * mTouchTargetWidth, mDeltaY);
} else if (mBottomBorderActive) {
mDeltaY = Math.min(mDragLayer.getHeight() - (mBaselineY + mBaselineHeight), deltaY);
mDeltaY = Math.max(-mBaselineHeight + 2 * mTouchTargetWidth, mDeltaY);
}
}
public void visualizeResizeForDelta(int deltaX, int deltaY) {
visualizeResizeForDelta(deltaX, deltaY, false);
}
/**
* Based on the deltas, we resize the frame, and, if needed, we resize the widget.
*/
private void visualizeResizeForDelta(int deltaX, int deltaY, boolean onDismiss) {
updateDeltas(deltaX, deltaY);
DragLayer.LayoutParams lp = (DragLayer.LayoutParams) getLayoutParams();
if (mLeftBorderActive) {
lp.x = mBaselineX + mDeltaX;
lp.width = mBaselineWidth - mDeltaX;
} else if (mRightBorderActive) {
lp.width = mBaselineWidth + mDeltaX;
}
if (mTopBorderActive) {
lp.y = mBaselineY + mDeltaY;
lp.height = mBaselineHeight - mDeltaY;
} else if (mBottomBorderActive) {
lp.height = mBaselineHeight + mDeltaY;
}
resizeWidgetIfNeeded(onDismiss);
requestLayout();
}
/**
* Based on the current deltas, we determine if and how to resize the widget.
*/
private void resizeWidgetIfNeeded(boolean onDismiss) {
int xThreshold = mCellLayout.getCellWidth() + mCellLayout.getWidthGap();
int yThreshold = mCellLayout.getCellHeight() + mCellLayout.getHeightGap();
int deltaX = mDeltaX + mDeltaXAddOn;
int deltaY = mDeltaY + mDeltaYAddOn;
float hSpanIncF = 1.0f * deltaX / xThreshold - mRunningHInc;
float vSpanIncF = 1.0f * deltaY / yThreshold - mRunningVInc;
int hSpanInc = 0;
int vSpanInc = 0;
int cellXInc = 0;
int cellYInc = 0;
int countX = mCellLayout.getCountX();
int countY = mCellLayout.getCountY();
if (Math.abs(hSpanIncF) > RESIZE_THRESHOLD) {
hSpanInc = Math.round(hSpanIncF);
}
if (Math.abs(vSpanIncF) > RESIZE_THRESHOLD) {
vSpanInc = Math.round(vSpanIncF);
}
if (!onDismiss && (hSpanInc == 0 && vSpanInc == 0)) return;
CellLayout.LayoutParams lp = (CellLayout.LayoutParams) mWidgetView.getLayoutParams();
int spanX = lp.cellHSpan;
int spanY = lp.cellVSpan;
int cellX = lp.useTmpCoords ? lp.tmpCellX : lp.cellX;
int cellY = lp.useTmpCoords ? lp.tmpCellY : lp.cellY;
int hSpanDelta = 0;
int vSpanDelta = 0;
// For each border, we bound the resizing based on the minimum width, and the maximum
// expandability.
if (mLeftBorderActive) {
cellXInc = Math.max(-cellX, hSpanInc);
cellXInc = Math.min(lp.cellHSpan - mMinHSpan, cellXInc);
hSpanInc *= -1;
hSpanInc = Math.min(cellX, hSpanInc);
hSpanInc = Math.max(-(lp.cellHSpan - mMinHSpan), hSpanInc);
hSpanDelta = -hSpanInc;
} else if (mRightBorderActive) {
hSpanInc = Math.min(countX - (cellX + spanX), hSpanInc);
hSpanInc = Math.max(-(lp.cellHSpan - mMinHSpan), hSpanInc);
hSpanDelta = hSpanInc;
}
if (mTopBorderActive) {
cellYInc = Math.max(-cellY, vSpanInc);
cellYInc = Math.min(lp.cellVSpan - mMinVSpan, cellYInc);
vSpanInc *= -1;
vSpanInc = Math.min(cellY, vSpanInc);
vSpanInc = Math.max(-(lp.cellVSpan - mMinVSpan), vSpanInc);
vSpanDelta = -vSpanInc;
} else if (mBottomBorderActive) {
vSpanInc = Math.min(countY - (cellY + spanY), vSpanInc);
vSpanInc = Math.max(-(lp.cellVSpan - mMinVSpan), vSpanInc);
vSpanDelta = vSpanInc;
}
mDirectionVector[0] = 0;
mDirectionVector[1] = 0;
// Update the widget's dimensions and position according to the deltas computed above
if (mLeftBorderActive || mRightBorderActive) {
spanX += hSpanInc;
cellX += cellXInc;
if (hSpanDelta != 0) {
mDirectionVector[0] = mLeftBorderActive ? -1 : 1;
}
}
if (mTopBorderActive || mBottomBorderActive) {
spanY += vSpanInc;
cellY += cellYInc;
if (vSpanDelta != 0) {
mDirectionVector[1] = mTopBorderActive ? -1 : 1;
}
}
if (!onDismiss && vSpanDelta == 0 && hSpanDelta == 0) return;
// We always want the final commit to match the feedback, so we make sure to use the
// last used direction vector when committing the resize / reorder.
if (onDismiss) {
mDirectionVector[0] = mLastDirectionVector[0];
mDirectionVector[1] = mLastDirectionVector[1];
} else {
mLastDirectionVector[0] = mDirectionVector[0];
mLastDirectionVector[1] = mDirectionVector[1];
}
if (mCellLayout.createAreaForResize(cellX, cellY, spanX, spanY, mWidgetView,
mDirectionVector, onDismiss)) {
lp.tmpCellX = cellX;
lp.tmpCellY = cellY;
lp.cellHSpan = spanX;
lp.cellVSpan = spanY;
mRunningVInc += vSpanDelta;
mRunningHInc += hSpanDelta;
if (!onDismiss) {
updateWidgetSizeRanges(mWidgetView, mLauncher, spanX, spanY);
}
}
mWidgetView.requestLayout();
}
static void updateWidgetSizeRanges(AppWidgetHostView widgetView, Launcher launcher,
int spanX, int spanY) {
getWidgetSizeRanges(launcher, spanX, spanY, sTmpRect);
widgetView.updateAppWidgetSize(null, sTmpRect.left, sTmpRect.top,
sTmpRect.right, sTmpRect.bottom);
}
public static Rect getWidgetSizeRanges(Launcher launcher, int spanX, int spanY, Rect rect) {
if (rect == null) {
rect = new Rect();
}
Rect landMetrics = Workspace.getCellLayoutMetrics(launcher, CellLayout.LANDSCAPE);
Rect portMetrics = Workspace.getCellLayoutMetrics(launcher, CellLayout.PORTRAIT);
final float density = launcher.getResources().getDisplayMetrics().density;
// Compute landscape size
int cellWidth = landMetrics.left;
int cellHeight = landMetrics.top;
int widthGap = landMetrics.right;
int heightGap = landMetrics.bottom;
int landWidth = (int) ((spanX * cellWidth + (spanX - 1) * widthGap) / density);
int landHeight = (int) ((spanY * cellHeight + (spanY - 1) * heightGap) / density);
// Compute portrait size
cellWidth = portMetrics.left;
cellHeight = portMetrics.top;
widthGap = portMetrics.right;
heightGap = portMetrics.bottom;
int portWidth = (int) ((spanX * cellWidth + (spanX - 1) * widthGap) / density);
int portHeight = (int) ((spanY * cellHeight + (spanY - 1) * heightGap) / density);
rect.set(portWidth, landHeight, landWidth, portHeight);
return rect;
}
/**
* This is the final step of the resize. Here we save the new widget size and position
* to LauncherModel and animate the resize frame.
*/
public void commitResize() {
resizeWidgetIfNeeded(true);
requestLayout();
}
public void onTouchUp() {
int xThreshold = mCellLayout.getCellWidth() + mCellLayout.getWidthGap();
int yThreshold = mCellLayout.getCellHeight() + mCellLayout.getHeightGap();
mDeltaXAddOn = mRunningHInc * xThreshold;
mDeltaYAddOn = mRunningVInc * yThreshold;
mDeltaX = 0;
mDeltaY = 0;
post(new Runnable() {
@Override
public void run() {
snapToWidget(true);
}
});
}
public void snapToWidget(boolean animate) {
final DragLayer.LayoutParams lp = (DragLayer.LayoutParams) getLayoutParams();
int newWidth = mWidgetView.getWidth() + 2 * mBackgroundPadding
- mWidgetPadding.left - mWidgetPadding.right;
int newHeight = mWidgetView.getHeight() + 2 * mBackgroundPadding
- mWidgetPadding.top - mWidgetPadding.bottom;
mTmpPt[0] = mWidgetView.getLeft();
mTmpPt[1] = mWidgetView.getTop();
mDragLayer.getDescendantCoordRelativeToSelf(mCellLayout.getShortcutsAndWidgets(), mTmpPt);
int newX = mTmpPt[0] - mBackgroundPadding + mWidgetPadding.left;
int newY = mTmpPt[1] - mBackgroundPadding + mWidgetPadding.top;
// We need to make sure the frame's touchable regions lie fully within the bounds of the
// DragLayer. We allow the actual handles to be clipped, but we shift the touch regions
// down accordingly to provide a proper touch target.
if (newY < 0) {
// In this case we shift the touch region down to start at the top of the DragLayer
mTopTouchRegionAdjustment = -newY;
} else {
mTopTouchRegionAdjustment = 0;
}
if (newY + newHeight > mDragLayer.getHeight()) {
// In this case we shift the touch region up to end at the bottom of the DragLayer
mBottomTouchRegionAdjustment = -(newY + newHeight - mDragLayer.getHeight());
} else {
mBottomTouchRegionAdjustment = 0;
}
if (!animate) {
lp.width = newWidth;
lp.height = newHeight;
lp.x = newX;
lp.y = newY;
mLeftHandle.setAlpha(1.0f);
mRightHandle.setAlpha(1.0f);
mTopHandle.setAlpha(1.0f);
mBottomHandle.setAlpha(1.0f);
requestLayout();
} else {
PropertyValuesHolder width = PropertyValuesHolder.ofInt("width", lp.width, newWidth);
PropertyValuesHolder height = PropertyValuesHolder.ofInt("height", lp.height,
newHeight);
PropertyValuesHolder x = PropertyValuesHolder.ofInt("x", lp.x, newX);
PropertyValuesHolder y = PropertyValuesHolder.ofInt("y", lp.y, newY);
ObjectAnimator oa =
LauncherAnimUtils.ofPropertyValuesHolder(lp, this, width, height, x, y);
ObjectAnimator leftOa = LauncherAnimUtils.ofFloat(mLeftHandle, "alpha", 1.0f);
ObjectAnimator rightOa = LauncherAnimUtils.ofFloat(mRightHandle, "alpha", 1.0f);
ObjectAnimator topOa = LauncherAnimUtils.ofFloat(mTopHandle, "alpha", 1.0f);
ObjectAnimator bottomOa = LauncherAnimUtils.ofFloat(mBottomHandle, "alpha", 1.0f);
oa.addUpdateListener(new AnimatorUpdateListener() {
public void onAnimationUpdate(ValueAnimator animation) {
requestLayout();
}
});
AnimatorSet set = LauncherAnimUtils.createAnimatorSet();
if (mResizeMode == AppWidgetProviderInfo.RESIZE_VERTICAL) {
set.playTogether(oa, topOa, bottomOa);
} else if (mResizeMode == AppWidgetProviderInfo.RESIZE_HORIZONTAL) {
set.playTogether(oa, leftOa, rightOa);
} else {
set.playTogether(oa, leftOa, rightOa, topOa, bottomOa);
}
set.setDuration(SNAP_DURATION);
set.start();
}
}
}