void ScrollToLocation_NotRaiseEvent(int x, int y,
out UIScrollEventArgs hScrollEventArgs,
out UIScrollEventArgs vScrollEventArgs)
{
hScrollEventArgs = null;
vScrollEventArgs = null;
Size innerContentSize = this.InnerContentSize;
if (x > innerContentSize.Width - Width)
{
x = innerContentSize.Width - Width;
//inner content_size.Width may shorter than this.Width
//so we check if (x<0) later
}
if (x < 0)
{
x = 0;
}
//
int textLayoutBottom = _textLayer.Bottom;
if (y > textLayoutBottom - Height)
{
y = textLayoutBottom - Height;
//inner content_size.Height may shorter than this.Height
//so we check if (y<0) later
}
if (y < 0)
{
y = 0;
}
this.InvalidateGraphics();
this.SetViewport(x, y);
this.InvalidateGraphics();
}
void MyScrollByNotRaiseEvent(int dx, int dy, out UIScrollEventArgs hScrollEventArgs, out UIScrollEventArgs vScrollEventArgs)
{
vScrollEventArgs = null;
Size innerContentSize = this.InnerContentSize;
if (dy < 0)
{
int old_y = this.ViewportY;
if (ViewportY + dy < 0)
{
dy = -ViewportY;
this.SetViewport(this.ViewportX, 0);
}
else
{
this.SetViewport(this.ViewportX, this.ViewportY + dy);
}
if (this.vscrollableSurface != null && scrollRelation.HasVScrollChanged)
{
vScrollEventArgs = new UIScrollEventArgs(
UIScrollEventType.ThumbPosition,
old_y, ViewportY,
UIScrollOrientation.VerticalScroll);
}
}
else if (dy > 0)
{
int old_y = ViewportY;
int viewportButtom = ViewportY + Height;
if (viewportButtom + dy > innerContentSize.Height)
{
if (viewportButtom < innerContentSize.Height)
{
this.SetViewport(this.ViewportX, innerContentSize.Height - Height);
}
}
else
{
this.SetViewport(this.ViewportX, innerContentSize.Height + dy);
}
if (vscrollableSurface != null && scrollRelation.HasVScrollChanged)
{
vScrollEventArgs = new UIScrollEventArgs(UIScrollEventType.ThumbPosition, old_y, this.ViewportY, UIScrollOrientation.VerticalScroll);
}
}
hScrollEventArgs = null;
if (dx == 0)
{
}
else if (dx > 0)
{
int old_x = this.ViewportX;
int viewportRight = ViewportX + Width;
if (viewportRight + dx > innerContentSize.Width)
{
if (viewportRight < innerContentSize.Width)
{
this.SetViewport(innerContentSize.Width - Width, this.ViewportY);
}
}
else
{
this.SetViewport(this.ViewportX + dx, this.ViewportY);
}
if (vscrollableSurface != null && scrollRelation.HasHScrollChanged)
{
hScrollEventArgs = new UIScrollEventArgs(UIScrollEventType.ThumbPosition, old_x, ViewportX, UIScrollOrientation.HorizontalScroll);
}
}
else
{
int old_x = this.ViewportX;
if (old_x + dx < 0)
{
dx = -ViewportX;
SetViewport(0, this.ViewportY);
}
else
{
SetViewport(this.ViewportX + dx, this.ViewportY);
}
if (vscrollableSurface != null && scrollRelation.HasHScrollChanged)
{
hScrollEventArgs = new UIScrollEventArgs(UIScrollEventType.ThumbPosition,
old_x, this.ViewportX, UIScrollOrientation.HorizontalScroll);
}
}
if (vscrollableSurface != null)
{
vscrollableSurface.QuadPagesCalculateCanvas();
vscrollableSurface.FullModeUpdate = true;
}
}
void MyScrollToNotRaiseEvent(int x, int y,
out UIScrollEventArgs hScrollEventArgs,
out UIScrollEventArgs vScrollEventArgs)
{
hScrollEventArgs = null;
vScrollEventArgs = null;
Size innerContentSize = this.InnerContentSize;
if (x < 0)
{
x = 0;
}
else if (x > 0)
{
if (x > innerContentSize.Width - Width)
{
x = innerContentSize.Width - Width;
if (x < 0)
{
x = 0;
}
}
}
if (y < 0)
{
y = 0;
}
else if (y > 0)
{
if (y > innerContentSize.Height - Height)
{
y = innerContentSize.Height - Height;
if (y < 0)
{
y = 0;
}
}
}
if (vscrollableSurface == null)
{
this.InvalidateGraphics();
this.SetViewport(x, y);
this.InvalidateGraphics();
}
else
{
if (ViewportX != x && scrollRelation.HasHScrollChanged)
{
hScrollEventArgs = new UIScrollEventArgs(UIScrollEventType.ThumbPosition, this.ViewportX, x, UIScrollOrientation.HorizontalScroll);
}
if (ViewportY != y && scrollRelation.HasVScrollChanged)
{
vScrollEventArgs = new UIScrollEventArgs(UIScrollEventType.ThumbPosition, this.ViewportY, y, UIScrollOrientation.VerticalScroll);
}
this.SetViewport(x, y);
vscrollableSurface.QuadPagesCalculateCanvas();
vscrollableSurface.FullModeUpdate = true;
this.InvalidateGraphics();
vscrollableSurface.FullModeUpdate = false;
}
}
void ScrollOffset_NotRaiseEvent(int dx, int dy,
out UIScrollEventArgs hScrollEventArgs, out UIScrollEventArgs vScrollEventArgs)
{
vScrollEventArgs = null;
Size contentSize = this.InnerContentSize;
Size innerContentSize = new Size(this.Width, _textLayer.Bottom);
if (dy < 0)
{
int old_y = this.ViewportTop;
if (ViewportTop + dy < 0)
{
//? limit
this.SetViewport(this.ViewportLeft, 0);
}
else
{
this.SetViewport(this.ViewportLeft, this.ViewportTop + dy);
}
}
else if (dy > 0)
{
int old_y = ViewportTop;
int viewportButtom = ViewportTop + Height;
if (viewportButtom + dy > innerContentSize.Height)
{
int vwY = innerContentSize.Height - Height;
//limit
this.SetViewport(this.ViewportLeft, vwY > 0 ? vwY : 0);
}
else
{
this.SetViewport(this.ViewportLeft, old_y + dy);
}
}
//
hScrollEventArgs = null;
if (dx < 0)
{
int old_x = this.ViewportLeft;
if (old_x + dx < 0)
{
dx = -ViewportLeft;
SetViewport(0, this.ViewportTop);
}
else
{
SetViewport(this.ViewportLeft + dx, this.ViewportTop);
}
}
else if (dx > 0)
{
int old_x = this.ViewportLeft;
int viewportRight = ViewportLeft + Width;
if (viewportRight + dx > innerContentSize.Width)
{
if (viewportRight < innerContentSize.Width)
{
this.SetViewport(innerContentSize.Width - Width, this.ViewportTop);
}
}
else
{
this.SetViewport(this.ViewportLeft + dx, this.ViewportTop);
}
}
}
