public static void ScrollTextChanged(RichTextBox richTextBox, ChatBoxScrollbar.ChatBoxScrollbar advancedVScrollbar)
{
SCROLLINFO scrollinfo = GetScrollInfo(richTextBox);
if (scrollinfo.nMax > advancedVScrollbar.Maximum + richTextBox.Height)
{
PreviousRichTextBoxHeight = richTextBox.Height;
advancedVScrollbar.Maximum = scrollinfo.nMax - richTextBox.Height;
advancedVScrollbar.ThumbPosition = advancedVScrollbar.Maximum;
SetScrollingInfo(richTextBox.Handle, advancedVScrollbar.Maximum);
}
}
public static void ScrollVertically(RichTextBox richTextBox, ChatBoxScrollbar.ChatBoxScrollbar advancedVScrollbar)
{
SCROLLINFO scrollinfo = GetScrollInfo(richTextBox);
if (advancedVScrollbar.ThumbPosition != scrollinfo.nTrackPos)
{
if (scrollinfo.nMax > advancedVScrollbar.Maximum + richTextBox.Height)
{
PreviousRichTextBoxHeight = richTextBox.Height;
advancedVScrollbar.Maximum = scrollinfo.nMax - richTextBox.Height;
}
advancedVScrollbar.ThumbPosition = scrollinfo.nTrackPos;
}
}
public static void ScrollSizeChanged(RichTextBox richTextBox, ChatBoxScrollbar.ChatBoxScrollbar advancedVScrollbar)
{
///a litle bug here, have a look a it later, in certain situations trackbar freezes
if (advancedVScrollbar.Maximum >= 0)
{
SCROLLINFO scrollinfo = GetScrollInfo(richTextBox);
if (scrollinfo.nMax - richTextBox.Height > 0)
{
richTextBox.ScrollToCaret();
advancedVScrollbar.Maximum = scrollinfo.nMax - richTextBox.Height;
if (scrollinfo.nTrackPos <= advancedVScrollbar.Maximum)
{
advancedVScrollbar.ThumbPosition = scrollinfo.nTrackPos;
}
else
{
advancedVScrollbar.ThumbPosition = advancedVScrollbar.Maximum;
}
}
}
}
public static void AdjustRichTextBoxSize(RichTextBox richTextBox, ChatBoxScrollbar.ChatBoxScrollbar advancedVScrollbar)
{
richTextBox.Width -= advancedVScrollbar.Width - SystemInformation.VerticalScrollBarWidth;
}
public static void AdjustVScrollbarLocation(RichTextBox richTextBox, ChatBoxScrollbar.ChatBoxScrollbar advancedVScrollbar)
{
advancedVScrollbar.Location = new Point(richTextBox.Location.X + richTextBox.Width - SystemInformation.VerticalScrollBarWidth, richTextBox.Location.Y);
advancedVScrollbar.Height = richTextBox.Height;
advancedVScrollbar.Width = SystemInformation.VerticalScrollBarWidth;
}