// 当文档尺寸和文档原点改变后，更新卷滚条等等设施状态，以便文档可见
void AfterDocumentChanged(ScrollBarMember member)
{
if (member == ScrollBarMember.Both ||
member == ScrollBarMember.Horz)
{
this.m_lContentWidth = this.m_nCellWidth * 16 + (long)this.m_nLineTitleWidth + (long)this.m_nCommentWidth;
}
if (member == ScrollBarMember.Both ||
member == ScrollBarMember.Vert)
{
this.m_lContentHeight = this.m_nLineHeight * this.LineCount;
}
SetScrollBars(member);
}
// 当文档尺寸和文档原点改变后，
// 更新卷滚条，小edit控件 等设施状态，和使文档某区域失效以便文档可见
// parameters:
// scrollBarMember 卷滚条枚举值
// iRect 失效区域 当为null，则不失效，如bAll等于true则全部区域
internal void AfterDocumentChanged(ScrollBarMember scrollBarMember,
InvalidateRect iRect)
{
// 设小edit控件
this.SetEditPos(false); // 2008/11/26 changed 单纯改变文档尺寸，不应变动小edit的focus特性。也就是说，原来如果没有focus，现在也应没有
// 设卷滚条信息
this.SetScrollBars(scrollBarMember);
// 失效区域
if (iRect != null)
{
if (iRect.bAll == true)
this.Invalidate();
else
this.Invalidate(iRect.rect);
}
}
// 设卷滚条
// parameter:
// member
private void SetScrollBars(ScrollBarMember member)
{
if (member == ScrollBarMember.Horz
|| member == ScrollBarMember.Both)
{
// 水平方向
API.ScrollInfoStruct si = new API.ScrollInfoStruct();
si.cbSize = Marshal.SizeOf(si);
si.fMask = API.SIF_RANGE | API.SIF_POS | API.SIF_PAGE;
si.nMin = 0;
si.nMax = this.DocumentWidth;
si.nPage = this.ClientWidth;
si.nPos = - this.DocumentOrgX;
API.SetScrollInfo(this.Handle, API.SB_HORZ, ref si, true);
}
if (member == ScrollBarMember.Vert
|| member == ScrollBarMember.Both)
{
// 垂直方向
API.ScrollInfoStruct si = new API.ScrollInfoStruct();
si.cbSize = Marshal.SizeOf(si);
si.fMask = API.SIF_RANGE | API.SIF_POS | API.SIF_PAGE;
si.nMin = 0;
si.nMax = this.DocumentHeight;
si.nPage = this.ClientHeight;
si.nPos = -this.DocumentOrgY;
API.SetScrollInfo(this.Handle, API.SB_VERT, ref si, true);
}
}
void SetScrollBars(ScrollBarMember member)
{
nNestedSetScrollBars++;
try
{
int nClientWidth = this.ClientSize.Width;
int nClientHeight = this.ClientSize.Height;
// 文档尺寸
long lDocumentWidth = DocumentWidth;
long lDocumentHeight = DocumentHeight;
long lWindowOrgX = this.m_lWindowOrgX;
long lWindowOrgY = this.m_lWindowOrgY;
if (member == ScrollBarMember.Horz ||
member == ScrollBarMember.Both)
{
if (TooLarge(lDocumentWidth) == true)
{
this.m_h_ratio = (double)(Int16.MaxValue - 1) / (double)lDocumentWidth;
lDocumentWidth = (long)((double)lDocumentWidth * m_h_ratio);
nClientWidth = (int)((double)nClientWidth * m_h_ratio);
lWindowOrgX = (long)((double)lWindowOrgX * m_h_ratio);
}
else
{
this.m_h_ratio = 1.0F;
}
// 水平方向
API.ScrollInfoStruct si = new API.ScrollInfoStruct();
si.cbSize = Marshal.SizeOf(si);
si.fMask = API.SIF_RANGE | API.SIF_POS | API.SIF_PAGE;
si.nMin = 0;
si.nMax = (int)lDocumentWidth;
si.nPage = nClientWidth;
si.nPos = -(int)lWindowOrgX;
API.SetScrollInfo(this.Handle, API.SB_HORZ, ref si, true);
}
if (member == ScrollBarMember.Vert ||
member == ScrollBarMember.Both)
{
if (TooLarge(lDocumentHeight) == true)
{
this.m_v_ratio = (double)(Int16.MaxValue - 1) / (double)lDocumentHeight;
lDocumentHeight = (long)((double)lDocumentHeight * m_v_ratio);
nClientHeight = (int)((double)nClientHeight * m_v_ratio);
lWindowOrgY = (long)((double)lWindowOrgY * m_v_ratio);
}
else
{
this.m_v_ratio = 1.0F;
}
// 垂直方向
API.ScrollInfoStruct si = new API.ScrollInfoStruct();
si.cbSize = Marshal.SizeOf(si);
si.fMask = API.SIF_RANGE | API.SIF_POS | API.SIF_PAGE;
si.nMin = 0;
si.nMax = (int)lDocumentHeight;
si.nPage = nClientHeight;
si.nPos = -(int)lWindowOrgY;
// Debug.Assert(si.nPos != 0, "");
API.SetScrollInfo(this.Handle, API.SB_VERT, ref si, true);
}
}
finally
{
nNestedSetScrollBars--;
}
}
void SetScrollBars(ScrollBarMember member)
{
nNestedSetScrollBars++;
try
{
int nClientWidth = this.ClientSize.Width;
int nClientHeight = this.ClientSize.Height;
// 文档尺寸
long lDocumentWidth = DocumentWidth;
long lDocumentHeight = DocumentHeight;
long lWindowOrgX = this.m_lWindowOrgX;
long lWindowOrgY = this.m_lWindowOrgY;
if (member == ScrollBarMember.Horz
|| member == ScrollBarMember.Both)
{
if (TooLarge(lDocumentWidth) == true)
{
this.m_h_ratio = (double)(Int16.MaxValue - 1) / (double)lDocumentWidth;
lDocumentWidth = (long)((double)lDocumentWidth * m_h_ratio);
nClientWidth = (int)((double)nClientWidth * m_h_ratio);
lWindowOrgX = (long)((double)lWindowOrgX * m_h_ratio);
}
else
this.m_h_ratio = 1.0F;
// 水平方向
API.ScrollInfoStruct si = new API.ScrollInfoStruct();
si.cbSize = Marshal.SizeOf(si);
si.fMask = API.SIF_RANGE | API.SIF_POS | API.SIF_PAGE;
si.nMin = 0;
si.nMax = (int)lDocumentWidth;
si.nPage = nClientWidth;
si.nPos = -(int)lWindowOrgX;
API.SetScrollInfo(this.Handle, API.SB_HORZ, ref si, true);
}
if (member == ScrollBarMember.Vert
|| member == ScrollBarMember.Both)
{
if (TooLarge(lDocumentHeight) == true)
{
this.m_v_ratio = (double)(Int16.MaxValue - 1) / (double)lDocumentHeight;
lDocumentHeight = (long)((double)lDocumentHeight * m_v_ratio);
nClientHeight = (int)((double)nClientHeight * m_v_ratio);
lWindowOrgY = (long)((double)lWindowOrgY * m_v_ratio);
}
else
this.m_v_ratio = 1.0F;
// 垂直方向
API.ScrollInfoStruct si = new API.ScrollInfoStruct();
si.cbSize = Marshal.SizeOf(si);
si.fMask = API.SIF_RANGE | API.SIF_POS | API.SIF_PAGE;
si.nMin = 0;
si.nMax = (int)lDocumentHeight;
si.nPage = nClientHeight;
si.nPos = -(int)lWindowOrgY;
// Debug.Assert(si.nPos != 0, "");
API.SetScrollInfo(this.Handle, API.SB_VERT, ref si, true);
}
}
finally
{
nNestedSetScrollBars--;
}
}
// 当文档尺寸和文档原点改变后，更新卷滚条等等设施状态，以便文档可见
void AfterDocumentChanged(ScrollBarMember member)
{
if (member == ScrollBarMember.Both
|| member == ScrollBarMember.Horz)
this.m_lContentWidth = this.m_nCellWidth * 16 + (long)this.m_nLineTitleWidth + (long)this.m_nCommentWidth;
if (member == ScrollBarMember.Both
|| member == ScrollBarMember.Vert)
this.m_lContentHeight = this.m_nLineHeight * this.LineCount;
SetScrollBars(member);
}
// 设卷滚条
void SetScrollBars(ScrollBarMember member)
{
if (bAutoSize == true)
{
API.ShowScrollBar(this.Handle,
API.SB_HORZ,
false);
API.ShowScrollBar(this.Handle,
API.SB_VERT,
false);
return;
}
nClientWidth = this.ClientSize.Width;
nClientHeight = this.ClientSize.Height;
if (member == ScrollBarMember.Horz
|| member == ScrollBarMember.Both)
{
// 水平方向
API.ScrollInfoStruct si = new API.ScrollInfoStruct();
si.cbSize = Marshal.SizeOf(si);
si.fMask = API.SIF_RANGE | API.SIF_POS | API.SIF_PAGE;
si.nMin = 0;
si.nMax = DocumentWidth ;
si.nPage = nClientWidth;
si.nPos = -nDocumentOrgX;
API.SetScrollInfo(this.Handle, API.SB_HORZ, ref si, true);
}
if (member == ScrollBarMember.Vert
|| member == ScrollBarMember.Both)
{
// 垂直方向
API.ScrollInfoStruct si = new API.ScrollInfoStruct();
si.cbSize = Marshal.SizeOf(si);
si.fMask = API.SIF_RANGE | API.SIF_POS | API.SIF_PAGE;
si.nMin = 0;
si.nMax = DocumentHeight ;
si.nPage = nClientHeight;
si.nPos = -nDocumentOrgY;
API.SetScrollInfo(this.Handle, API.SB_VERT, ref si, true);
}
}
// 文档尺寸发生变化
internal void AfterDocumentChanged(ScrollBarMember member)
{
if (bAutoSize == true)
{
this.ClientSize = new Size(this.DocumentWidth, this.DocumentHeight);
}
else
{
SetScrollBars(member);
}
}
