protected override void OnMeasure(MeasureSpec widthSpec, MeasureSpec heightSpec, Graphics g, Font font, Style style)
{
SizeF size = g.MeasureString(Value, font);
SetDesiredSize(GetChildSize(widthSpec, size.Width), GetChildSize(heightSpec, size.Height));
}
protected override void OnMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
base.OnMeasure(widthMeasureSpec, heightMeasureSpec);
MenuView.Measure(MeasureSpec.MakeMeasureSpec(0,
MeasureSpecMode.Unspecified), MeasureSpec.MakeMeasureSpec(
MeasuredHeight, MeasureSpecMode.Exactly));
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
int resWidth = 0;
int resHeight = 0;
int width = MeasureSpec.GetSize(widthMeasureSpec);
int widthMode = (int)MeasureSpec.GetMode(widthMeasureSpec);
int height = MeasureSpec.GetSize(heightMeasureSpec);
int heightMode = (int)MeasureSpec.GetMode(heightMeasureSpec);
if (widthMode != (int)MeasureSpecMode.Exactly ||
heightMode != (int)MeasureSpecMode.Exactly)
{
resWidth = this.SuggestedMinimumWidth;
resWidth = resWidth == 0 ? getDefaultWidth() : resWidth;
resHeight = this.SuggestedMinimumHeight;
resHeight = resHeight == 0 ? getDefaultWidth() : resHeight;
}
else
{
resWidth = resHeight = Math.Min(width, height);
}
SetMeasuredDimension(resWidth, resHeight);
mRadius = Math.Max(this.MeasuredWidth, this.MeasuredHeight);
int count = ChildCount;
// menu ite
int childSize = (int)(mRadius * RADIO_DEFAULT_CHILD_DIMENSION);
// menu item
int childMode = (int)MeasureSpecMode.Exactly;
for (int i = 0; i < count; i++)
{
View child = GetChildAt(i);
if (child.Visibility == ViewStates.Gone)
{
continue;
}
// menu item
int makeMeasureSpec = -1;
if (child.Id == Resource.Id.circle_menu_item_center)
{
makeMeasureSpec = MeasureSpec.MakeMeasureSpec(
(int)(mRadius * RADIO_DEFAULT_CENTERITEM_DIMENSION),
MeasureSpec.GetMode(childMode));
}
else
{
makeMeasureSpec = (int)MeasureSpec.MakeMeasureSpec(childSize,
MeasureSpec.GetMode(childMode));
}
child.Measure(makeMeasureSpec, makeMeasureSpec);
}
mPadding = RADIO_PADDING_LAYOUT * mRadius;
}
protected override void OnLayout(bool changed, int l, int t, int r, int b)
{
FormsViewPager pager = _viewPager;
Context context = Context;
var width = r - l;
var height = b - t;
if (IsBottomTabPlacement)
{
if (width <= 0 || height <= 0)
{
return;
}
_relativeLayout.Measure(
MeasureSpec.MakeMeasureSpec(width, MeasureSpecMode.Exactly),
MeasureSpec.MakeMeasureSpec(height, MeasureSpecMode.Exactly));
pager.Measure(MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.AtMost), MeasureSpecFactory.MakeMeasureSpec(height, MeasureSpecMode.AtMost));
if (width > 0 && height > 0)
{
PageController.ContainerArea = new Graphics.Rect(0, 0, context.FromPixels(width), context.FromPixels(height - _bottomNavigationView.MeasuredHeight));
SetNavigationRendererPadding(0, _bottomNavigationView.MeasuredHeight);
pager.Layout(0, 0, width, b);
// We need to measure again to ensure that the tabs show up
_relativeLayout.Measure(
MeasureSpec.MakeMeasureSpec(width, MeasureSpecMode.Exactly),
MeasureSpec.MakeMeasureSpec(height, MeasureSpecMode.Exactly));
_relativeLayout.Layout(0, 0, _relativeLayout.MeasuredWidth, _relativeLayout.MeasuredHeight);
}
}
else
{
TabLayout tabs = _tabLayout;
tabs.Measure(MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.Exactly), MeasureSpecFactory.MakeMeasureSpec(height, MeasureSpecMode.AtMost));
var tabsHeight = 0;
if (tabs.Visibility != ViewStates.Gone)
{
tabsHeight = Math.Min(height, Math.Max(tabs.MeasuredHeight, tabs.MinimumHeight));
}
pager.Measure(MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.AtMost), MeasureSpecFactory.MakeMeasureSpec(height, MeasureSpecMode.AtMost));
if (width > 0 && height > 0)
{
PageController.ContainerArea = new Graphics.Rect(0, context.FromPixels(tabsHeight), context.FromPixels(width), context.FromPixels(height - tabsHeight));
SetNavigationRendererPadding(tabsHeight, 0);
pager.Layout(0, 0, width, b);
// We need to measure again to ensure that the tabs show up
tabs.Measure(MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.Exactly), MeasureSpecFactory.MakeMeasureSpec(tabsHeight, MeasureSpecMode.Exactly));
tabs.Layout(0, 0, width, tabsHeight);
UpdateTabBarTranslation(pager.CurrentItem, 0);
}
}
base.OnLayout(changed, l, t, r, b);
}
