internal virtual int measureContentWidth(android.widget.SpinnerAdapter adapter, android.graphics.drawable.Drawable
background)
{
if (adapter == null)
{
return 0;
}
int width = 0;
android.view.View itemView = null;
int itemType = 0;
int widthMeasureSpec = android.view.View.MeasureSpec.makeMeasureSpec(0, android.view.View
.MeasureSpec.UNSPECIFIED);
int heightMeasureSpec = android.view.View.MeasureSpec.makeMeasureSpec(0, android.view.View
.MeasureSpec.UNSPECIFIED);
// Make sure the number of items we'll measure is capped. If it's a huge data set
// with wildly varying sizes, oh well.
int start = System.Math.Max(0, getSelectedItemPosition());
int end = System.Math.Min(adapter.getCount(), start + MAX_ITEMS_MEASURED);
int count = end - start;
start = System.Math.Max(0, start - (MAX_ITEMS_MEASURED - count));
{
for (int i = start; i < end; i++)
{
int positionType = adapter.getItemViewType(i);
if (positionType != itemType)
{
itemType = positionType;
itemView = null;
}
itemView = adapter.getView(i, itemView, this);
if (itemView.getLayoutParams() == null)
{
itemView.setLayoutParams(new android.view.ViewGroup.LayoutParams(android.view.ViewGroup
.LayoutParams.WRAP_CONTENT, android.view.ViewGroup.LayoutParams.WRAP_CONTENT));
}
itemView.measure(widthMeasureSpec, heightMeasureSpec);
width = System.Math.Max(width, itemView.getMeasuredWidth());
}
}
// Add background padding to measured width
if (background != null)
{
background.getPadding(mTempRect);
width += mTempRect.left + mTempRect.right;
}
return width;
}
/// <summary>
/// Supply a Drawable that is to be rendered on top of all of the child
/// views in the frame layout.
/// </summary>
/// <remarks>
/// Supply a Drawable that is to be rendered on top of all of the child
/// views in the frame layout. Any padding in the Drawable will be taken
/// into account by ensuring that the children are inset to be placed
/// inside of the padding area.
/// </remarks>
/// <param name="drawable">The Drawable to be drawn on top of the children.</param>
/// <attr>ref android.R.styleable#FrameLayout_foreground</attr>
public virtual void setForeground(android.graphics.drawable.Drawable drawable)
{
if (mForeground != drawable)
{
if (mForeground != null)
{
mForeground.setCallback(null);
unscheduleDrawable(mForeground);
}
mForeground = drawable;
mForegroundPaddingLeft = 0;
mForegroundPaddingTop = 0;
mForegroundPaddingRight = 0;
mForegroundPaddingBottom = 0;
if (drawable != null)
{
setWillNotDraw(false);
drawable.setCallback(this);
if (drawable.isStateful())
{
drawable.setState(getDrawableState());
}
if (mForegroundGravity == android.view.Gravity.FILL)
{
android.graphics.Rect padding = new android.graphics.Rect();
if (drawable.getPadding(padding))
{
mForegroundPaddingLeft = padding.left;
mForegroundPaddingTop = padding.top;
mForegroundPaddingRight = padding.right;
mForegroundPaddingBottom = padding.bottom;
}
}
}
else
{
setWillNotDraw(true);
}
requestLayout();
invalidate();
}
}
