/// <summary>
/// Set timer clok to notify the changes
/// </summary>
private void m_timer_Tick(object sender, EventArgs e)
{
timerCount++;
GridRangeInfo gCells = GridRangeInfo.EmptyRange();
if (oldSize != m_syncGrid.ClientSize)
{
// Dispose graphics context if size was changed.
if (g != null)
{
g.Dispose();
}
g = null;
oldSize = m_syncGrid.ClientSize;
}
if (drawDirectToDC && g == null)
{
g = m_syncGrid.CreateGridGraphics();
}
try
{
for (int i = 0; i < m_numUpdatesPerTick; i++)
{
int recNum = rand.Next(m_set.Count - 1);
int rowNum = recNum + 1;
int col = rand.Next(18) + 1;
int colNum = col + 1;
object[] drow = (object[])m_set[recNum];
drow[col] = rand.Next(100);
GridRangeInfo g1 = GridRangeInfo.Cell(rowNum, colNum);
gCells = GridRangeInfo.UnionRange(gCells, g1);
// Clear our volatile cache
m_syncGrid.ResetVolatileData();
// Handle case when values is change for current cell.
if (g1 == m_syncGrid.CurrentCell.RangeInfo)
{
m_syncGrid.CurrentCell.Model.ResetActiveText(rowNum, colNum);
}
else
{
// Draw direct to dc
if (drawDirectToDC)
{
Rectangle bounds = m_syncGrid.RangeInfoToRectangle(g1);
if (!bounds.IsEmpty)
{
// DrawClippedGrid method lets you simply draw the cells at the specified bounds directly to the graphics context.
m_syncGrid.DrawClippedGrid(g, bounds);
}
}
}
}
if (!drawDirectToDC)
{
m_syncGrid.ResetVolatileData();
m_syncGrid.ViewLayout.Lock(); // Prevent subsequent calls to ViewLayout.Reset method from clearing the layout information. Method was added in 3.1.0.x
Rectangle bounds = m_syncGrid.RangeInfoToRectangle(gCells);
if (!bounds.IsEmpty)
{
m_syncGrid.Invalidate(bounds);
m_syncGrid.Update();
}
m_syncGrid.ViewLayout.Unlock();
}
// Insert or remove a row
if (insertRemoveCount == 0)
{
return;
}
if (toggleInsertRemove > 0 && (timerCount % insertRemoveModulus) == 0)
{
icount = ++icount % (toggleInsertRemove * 2);
shouldInsert = icount <= toggleInsertRemove;
Console.WriteLine(m_syncGrid.RowCount);
if (shouldInsert)
{
for (int ri = 0; ri < insertRemoveCount; ri++)
{
int recNum = rand.Next(m_set.Count - 1);
int rowNum = recNum + 1;
// Underlying data structure (this could be a datatable or whatever structure
// you use behind a virtual grid).
//
// In this case it is a ArrayList
int next = rand.Next(100);
object[] row = new object[] { "Hello world", next + 1, next + 2,
next + 3, next + 4, next + 5, next + 6,
next + 7, next + 8, next + 9, next + 10,
next + 11, next + 12, next + 13, next + 14,
next + 15, next + 16, next + 17,
next + 18, next + 19, next + 20 };
m_set.Insert(recNum, row);
// Now that the change was done in the underlying datasource we need
// to tell the grid to reflect those changes:
m_syncGrid.Model.ResetVolatileData();
// Old way:
if (!drawDirectToDC)
{
m_syncGrid.Rows.OnRangeInserting(new GridRangeInsertingEventArgs(rowNum, 1, null));
m_syncGrid.Rows.OnRangeInserted(new GridRangeInsertedEventArgs(rowNum, 1, null, true));
m_syncGrid.Update();
}
else
{
// Optimized way: Directly calling ScrollWindows, don't let ScrollWindow call Invalidate.
if (rowNum < m_syncGrid.TopRowIndex)
{
if (!allowChangeTopRowWhenInsertBeforeView || !m_syncGrid.ViewLayout.HasPartialVisibleRows) // checks whether the last row is shown and fully visible
{
// in this case we need to insert at top
rowNum = m_syncGrid.TopRowIndex;
}
else
{
// If record is inserted before viewable area, simply increase
// the top row so that the viewable area stays the same. No
// drawing of the screen is needed.
m_syncGrid.InternalSetTopRow(m_syncGrid.TopRowIndex + 1);
m_syncGrid.UpdateScrollBars();
rowNum = -1; // mark it as handled.
if (showNumberedRowHeaders)
{
// Repaint only row headers - they all change
Rectangle rowHeaderBounds = m_syncGrid.RangeInfoToRectangle(GridRangeInfo.Col(0));
m_syncGrid.DrawClippedGrid(g, rowHeaderBounds);
}
}
}
if (rowNum != -1)
{
GridRangeInfo rg = GridRangeInfo.Row(rowNum);
Rectangle bounds = m_syncGrid.RangeInfoToRectangle(rg);
if (!bounds.IsEmpty)
{
if (showNumberedRowHeaders)
{
// don't scroll row header area - leave it as is (only works if all rows have same height ...)
bounds.X += m_syncGrid.ColWidths[0];
if (!m_syncGrid.ViewLayout.HasPartialVisibleRows)
{
// Repaint row headers below last row
Rectangle rowHeaderBounds = m_syncGrid.RangeInfoToRectangle(GridRangeInfo.Cells(m_syncGrid.RowCount, 0, m_syncGrid.RowCount, 0));
m_syncGrid.DrawClippedGrid(g, rowHeaderBounds);
}
}
// If rows can have different heights:
// m_syncGrid.ViewLayout.Reset();
Rectangle scrollBounds = new Rectangle(bounds.Left, bounds.Top, bounds.Right, m_syncGrid.ClientRectangle.Bottom);
m_syncGrid.ScrollWindow(0, bounds.Height, scrollBounds, scrollBounds, false); // don't cause Invalidate being called.
m_syncGrid.Model.ResetVolatileData();
// System.Threading.Thread.Sleep(1000);
// DrawClippedGrid method lets you simply draw the cells at the specified bounds directly to the graphics context.
m_syncGrid.DrawClippedGrid(g, bounds);
}
m_syncGrid.UpdateScrollBars();
}
}
}
}
else
{
for (int ri = 0; ri < insertRemoveCount; ri++)
{
int recNum = 5; //rand.Next(m_set.Count - 1);
int rowNum = recNum + 1;
// Underlying data structure (this could be a datatable or whatever structure
// you use behind a virtual grid).
//
// In this case it is a ArrayList
m_set.RemoveAt(recNum);
// Now that the change was done in the underlying datasource we need
// to tell the grid to reflect those changes:
// Old way:
if (!drawDirectToDC)
{
m_syncGrid.Rows.OnRangeRemoving(new GridRangeRemovingEventArgs(rowNum, rowNum + 1));
GridModelInsertRangeOptions iro = new GridModelInsertRangeOptions();
iro.RowColSizes = new int[m_syncGrid.Rows.DefaultSize];
m_syncGrid.Rows.OnRangeRemoved(new GridRangeRemovedEventArgs(rowNum, rowNum + 1, iro, true));
m_syncGrid.Update();
}
else
{
// Optimized way: Directly calling ScrollWindows, don't let ScrollWindow call Invalidate.
if (rowNum < m_syncGrid.TopRowIndex)
{
if (!allowChangeTopRowWhenInsertBeforeView || !m_syncGrid.ViewLayout.HasPartialVisibleRows) // checks whether the last row is shown and fully visible
{
// in this case we need to insert at top
rowNum = m_syncGrid.TopRowIndex;
}
else
{
// If record is inserted before viewable area, simply increase
// the top row so that the viewable area stays the same. No
// drawing of the screen is needed.
m_syncGrid.InternalSetTopRow(m_syncGrid.TopRowIndex - 1);
m_syncGrid.UpdateScrollBars();
if (showNumberedRowHeaders)
{
// Repaint only row headers - they all change
Rectangle rowHeaderBounds = m_syncGrid.RangeInfoToRectangle(GridRangeInfo.Col(0));
m_syncGrid.DrawClippedGrid(g, rowHeaderBounds);
}
rowNum = -1; // mark it as handled.
}
}
if (rowNum != -1)
{
GridRangeInfo rg = GridRangeInfo.Row(rowNum);
Rectangle bounds = m_syncGrid.RangeInfoToRectangle(rg);
if (!bounds.IsEmpty)
{
if (showNumberedRowHeaders)
{
// don't scroll row header area - leave it as is (only works if all rows have same height ...)
bounds.X += m_syncGrid.ColWidths[0];
}
// If rows can have different heights:
// m_syncGrid.ViewLayout.Reset();
Rectangle scrollBounds = new Rectangle(bounds.Left, bounds.Top, bounds.Right, m_syncGrid.ClientRectangle.Bottom);
Rectangle scrolledInViewBounds = m_syncGrid.ScrollWindow(0, -bounds.Height, scrollBounds, scrollBounds, false); // don't cause Invalidate being called.
m_syncGrid.Model.ResetVolatileData();
// DrawClippedGrid method lets you simply draw the cells at the specified bounds directly to the graphics context.
if (!m_syncGrid.ViewLayout.HasPartialVisibleRows)
{
scrolledInViewBounds = new Rectangle(0, m_syncGrid.ViewLayout.Corner.Y, bounds.Right, bounds.Height);
}
m_syncGrid.DrawClippedGrid(g, scrolledInViewBounds);
}
m_syncGrid.UpdateScrollBars();
}
}
}
}
}
}
finally
{
}
}
