protected void FormatPrepare(int AFirstDrawItemNo, int ALastItemNo = -1)
{
if (FFormatCount != 0)
{
return;
}
FormatInit();
if ((AFirstDrawItemNo > 0) && (!DrawItems[AFirstDrawItemNo].LineFirst))
{
throw new Exception("行中格式化必需从行首开始，否则会影响分散的计算！");
}
//vFirstDrawItemNo := Items[AStartItemNo].FirstDItemNo;
int vLastItemNo = -1, vFmtTopOffset = -1;
if (ALastItemNo < 0)
{
vLastItemNo = DrawItems[AFirstDrawItemNo].ItemNo;
}
else
{
vLastItemNo = ALastItemNo;
}
int vLastDrawItemNo = GetItemLastDrawItemNo(vLastItemNo);
DrawItems.MarkFormatDelete(AFirstDrawItemNo, vLastDrawItemNo);
if (AFirstDrawItemNo > 0)
{
FFormatStartTop = DrawItems[AFirstDrawItemNo - 1].Rect.Bottom;
vFmtTopOffset = DrawItems[AFirstDrawItemNo].Rect.Top - FFormatStartTop;
}
else
{
FFormatStartTop = 0;
vFmtTopOffset = 0;
}
for (int i = AFirstDrawItemNo + 1; i <= vLastDrawItemNo; i++)
{
if (DrawItems[i].LineFirst)
{
vFmtTopOffset = vFmtTopOffset + DrawItems[i].Rect.Top - DrawItems[i - 1].Rect.Bottom;
}
}
if (vFmtTopOffset != 0)
{
FFormatEndBottom = -1;
}
else
{
FFormatEndBottom = DrawItems[vLastDrawItemNo].Rect.Bottom - vFmtTopOffset;
}
}
public virtual void ReFormat()
{
if (FFormatCount == 0)
{
DrawItems.Clear();
InitializeField();
DrawItems.MarkFormatDelete(0, DrawItems.Count - 1);
FormatInit();
FormatRange(0, Items.Count - 1);
FFormatHeightChange = true;
}
if ((SelectInfo.StartItemNo >= 0) && (SelectInfo.StartItemNo < Items.Count))
{
ReSetSelectAndCaret(SelectInfo.StartItemNo, SelectInfo.StartItemOffset); // 防止清空后格式化完成后没有选中起始访问出错
}
else
{
ReSetSelectAndCaret(0, 0);
}
}
