use of android.graphics.Point in project XobotOS by xamarin.
the class View method setRight.
/**
* Sets the right position of this view relative to its parent. This method is meant to be called
* by the layout system and should not generally be called otherwise, because the property
* may be changed at any time by the layout.
*
* @param right The bottom of this view, in pixels.
*/
public final void setRight(int right) {
if (right != mRight) {
updateMatrix();
final boolean matrixIsIdentity = mTransformationInfo == null || mTransformationInfo.mMatrixIsIdentity;
if (matrixIsIdentity) {
if (mAttachInfo != null) {
int maxRight;
if (right < mRight) {
maxRight = mRight;
} else {
maxRight = right;
}
invalidate(0, 0, maxRight - mLeft, mBottom - mTop);
}
} else {
// Double-invalidation is necessary to capture view's old and new areas
invalidate(true);
}
int oldWidth = mRight - mLeft;
int height = mBottom - mTop;
mRight = right;
onSizeChanged(mRight - mLeft, height, oldWidth, height);
if (!matrixIsIdentity) {
if ((mPrivateFlags & PIVOT_EXPLICITLY_SET) == 0) {
// A change in dimension means an auto-centered pivot point changes, too
mTransformationInfo.mMatrixDirty = true;
}
// force another invalidation with the new orientation
mPrivateFlags |= DRAWN;
invalidate(true);
}
mBackgroundSizeChanged = true;
invalidateParentIfNeeded();
}
}
use of android.graphics.Point in project XobotOS by xamarin.
the class View method startDrag.
/**
* Starts a drag and drop operation. When your application calls this method, it passes a
* {@link android.view.View.DragShadowBuilder} object to the system. The
* system calls this object's {@link DragShadowBuilder#onProvideShadowMetrics(Point, Point)}
* to get metrics for the drag shadow, and then calls the object's
* {@link DragShadowBuilder#onDrawShadow(Canvas)} to draw the drag shadow itself.
* <p>
* Once the system has the drag shadow, it begins the drag and drop operation by sending
* drag events to all the View objects in your application that are currently visible. It does
* this either by calling the View object's drag listener (an implementation of
* {@link android.view.View.OnDragListener#onDrag(View,DragEvent) onDrag()} or by calling the
* View object's {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} method.
* Both are passed a {@link android.view.DragEvent} object that has a
* {@link android.view.DragEvent#getAction()} value of
* {@link android.view.DragEvent#ACTION_DRAG_STARTED}.
* </p>
* <p>
* Your application can invoke startDrag() on any attached View object. The View object does not
* need to be the one used in {@link android.view.View.DragShadowBuilder}, nor does it need to
* be related to the View the user selected for dragging.
* </p>
* @param data A {@link android.content.ClipData} object pointing to the data to be
* transferred by the drag and drop operation.
* @param shadowBuilder A {@link android.view.View.DragShadowBuilder} object for building the
* drag shadow.
* @param myLocalState An {@link java.lang.Object} containing local data about the drag and
* drop operation. This Object is put into every DragEvent object sent by the system during the
* current drag.
* <p>
* myLocalState is a lightweight mechanism for the sending information from the dragged View
* to the target Views. For example, it can contain flags that differentiate between a
* a copy operation and a move operation.
* </p>
* @param flags Flags that control the drag and drop operation. No flags are currently defined,
* so the parameter should be set to 0.
* @return {@code true} if the method completes successfully, or
* {@code false} if it fails anywhere. Returning {@code false} means the system was unable to
* do a drag, and so no drag operation is in progress.
*/
public final boolean startDrag(ClipData data, DragShadowBuilder shadowBuilder, Object myLocalState, int flags) {
if (ViewDebug.DEBUG_DRAG) {
Log.d(VIEW_LOG_TAG, "startDrag: data=" + data + " flags=" + flags);
}
boolean okay = false;
Point shadowSize = new Point();
Point shadowTouchPoint = new Point();
shadowBuilder.onProvideShadowMetrics(shadowSize, shadowTouchPoint);
if ((shadowSize.x < 0) || (shadowSize.y < 0) || (shadowTouchPoint.x < 0) || (shadowTouchPoint.y < 0)) {
throw new IllegalStateException("Drag shadow dimensions must not be negative");
}
if (ViewDebug.DEBUG_DRAG) {
Log.d(VIEW_LOG_TAG, "drag shadow: width=" + shadowSize.x + " height=" + shadowSize.y + " shadowX=" + shadowTouchPoint.x + " shadowY=" + shadowTouchPoint.y);
}
Surface surface = new Surface();
try {
IBinder token = mAttachInfo.mSession.prepareDrag(mAttachInfo.mWindow, flags, shadowSize.x, shadowSize.y, surface);
if (ViewDebug.DEBUG_DRAG)
Log.d(VIEW_LOG_TAG, "prepareDrag returned token=" + token + " surface=" + surface);
if (token != null) {
Canvas canvas = surface.lockCanvas(null);
try {
canvas.drawColor(0, PorterDuff.Mode.CLEAR);
shadowBuilder.onDrawShadow(canvas);
} finally {
surface.unlockCanvasAndPost(canvas);
}
final ViewRootImpl root = getViewRootImpl();
// Cache the local state object for delivery with DragEvents
root.setLocalDragState(myLocalState);
// repurpose 'shadowSize' for the last touch point
root.getLastTouchPoint(shadowSize);
okay = mAttachInfo.mSession.performDrag(mAttachInfo.mWindow, token, shadowSize.x, shadowSize.y, shadowTouchPoint.x, shadowTouchPoint.y, data);
if (ViewDebug.DEBUG_DRAG)
Log.d(VIEW_LOG_TAG, "performDrag returned " + okay);
// Off and running! Release our local surface instance; the drag
// shadow surface is now managed by the system process.
surface.release();
}
} catch (Exception e) {
Log.e(VIEW_LOG_TAG, "Unable to initiate drag", e);
surface.destroy();
}
return okay;
}
use of android.graphics.Point in project XobotOS by xamarin.
the class View method invalidate.
/**
* Mark the area defined by the rect (l,t,r,b) as needing to be drawn.
* The coordinates of the dirty rect are relative to the view.
* If the view is visible, {@link #onDraw(android.graphics.Canvas)}
* will be called at some point in the future. This must be called from
* a UI thread. To call from a non-UI thread, call {@link #postInvalidate()}.
* @param l the left position of the dirty region
* @param t the top position of the dirty region
* @param r the right position of the dirty region
* @param b the bottom position of the dirty region
*/
public void invalidate(int l, int t, int r, int b) {
if (ViewDebug.TRACE_HIERARCHY) {
ViewDebug.trace(this, ViewDebug.HierarchyTraceType.INVALIDATE);
}
if (skipInvalidate()) {
return;
}
if ((mPrivateFlags & (DRAWN | HAS_BOUNDS)) == (DRAWN | HAS_BOUNDS) || (mPrivateFlags & DRAWING_CACHE_VALID) == DRAWING_CACHE_VALID || (mPrivateFlags & INVALIDATED) != INVALIDATED) {
mPrivateFlags &= ~DRAWING_CACHE_VALID;
mPrivateFlags |= INVALIDATED;
mPrivateFlags |= DIRTY;
final ViewParent p = mParent;
final AttachInfo ai = mAttachInfo;
//noinspection PointlessBooleanExpression,ConstantConditions
if (!HardwareRenderer.RENDER_DIRTY_REGIONS) {
if (p != null && ai != null && ai.mHardwareAccelerated) {
// fast-track for GL-enabled applications; just invalidate the whole hierarchy
// with a null dirty rect, which tells the ViewAncestor to redraw everything
p.invalidateChild(this, null);
return;
}
}
if (p != null && ai != null && l < r && t < b) {
final int scrollX = mScrollX;
final int scrollY = mScrollY;
final Rect tmpr = ai.mTmpInvalRect;
tmpr.set(l - scrollX, t - scrollY, r - scrollX, b - scrollY);
p.invalidateChild(this, tmpr);
}
}
}
use of android.graphics.Point in project XobotOS by xamarin.
the class View method gatherTransparentRegion.
/**
* This is used by the RootView to perform an optimization when
* the view hierarchy contains one or several SurfaceView.
* SurfaceView is always considered transparent, but its children are not,
* therefore all View objects remove themselves from the global transparent
* region (passed as a parameter to this function).
*
* @param region The transparent region for this ViewAncestor (window).
*
* @return Returns true if the effective visibility of the view at this
* point is opaque, regardless of the transparent region; returns false
* if it is possible for underlying windows to be seen behind the view.
*
* {@hide}
*/
public boolean gatherTransparentRegion(Region region) {
final AttachInfo attachInfo = mAttachInfo;
if (region != null && attachInfo != null) {
final int pflags = mPrivateFlags;
if ((pflags & SKIP_DRAW) == 0) {
// The SKIP_DRAW flag IS NOT set, so this view draws. We need to
// remove it from the transparent region.
final int[] location = attachInfo.mTransparentLocation;
getLocationInWindow(location);
region.op(location[0], location[1], location[0] + mRight - mLeft, location[1] + mBottom - mTop, Region.Op.DIFFERENCE);
} else if ((pflags & ONLY_DRAWS_BACKGROUND) != 0 && mBGDrawable != null) {
// The ONLY_DRAWS_BACKGROUND flag IS set and the background drawable
// exists, so we remove the background drawable's non-transparent
// parts from this transparent region.
applyDrawableToTransparentRegion(mBGDrawable, region);
}
}
return true;
}
use of android.graphics.Point in project XobotOS by xamarin.
the class View method setFrame.
/**
* Assign a size and position to this view.
*
* This is called from layout.
*
* @param left Left position, relative to parent
* @param top Top position, relative to parent
* @param right Right position, relative to parent
* @param bottom Bottom position, relative to parent
* @return true if the new size and position are different than the
* previous ones
* {@hide}
*/
protected boolean setFrame(int left, int top, int right, int bottom) {
boolean changed = false;
if (DBG) {
Log.d("View", this + " View.setFrame(" + left + "," + top + "," + right + "," + bottom + ")");
}
if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) {
changed = true;
// Remember our drawn bit
int drawn = mPrivateFlags & DRAWN;
int oldWidth = mRight - mLeft;
int oldHeight = mBottom - mTop;
int newWidth = right - left;
int newHeight = bottom - top;
boolean sizeChanged = (newWidth != oldWidth) || (newHeight != oldHeight);
// Invalidate our old position
invalidate(sizeChanged);
mLeft = left;
mTop = top;
mRight = right;
mBottom = bottom;
mPrivateFlags |= HAS_BOUNDS;
if (sizeChanged) {
if ((mPrivateFlags & PIVOT_EXPLICITLY_SET) == 0) {
// A change in dimension means an auto-centered pivot point changes, too
if (mTransformationInfo != null) {
mTransformationInfo.mMatrixDirty = true;
}
}
onSizeChanged(newWidth, newHeight, oldWidth, oldHeight);
}
if ((mViewFlags & VISIBILITY_MASK) == VISIBLE) {
// If we are visible, force the DRAWN bit to on so that
// this invalidate will go through (at least to our parent).
// This is because someone may have invalidated this view
// before this call to setFrame came in, thereby clearing
// the DRAWN bit.
mPrivateFlags |= DRAWN;
invalidate(sizeChanged);
// parent display list may need to be recreated based on a change in the bounds
// of any child
invalidateParentCaches();
}
// Reset drawn bit to original value (invalidate turns it off)
mPrivateFlags |= drawn;
mBackgroundSizeChanged = true;
}
return changed;
}
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