public override bool PreProcessMessage(ref Message msg)
{
if (msg.Msg == WM_KEYDOWN)
{
if (focusedItem != null && items.Count > 0)
{
Keys keyData = ((Keys) (int) msg.WParam) | ModifierKeys;
Keys keyCode = ((Keys) (int) msg.WParam);
if (keyData == Keys.Down)
{
if (focusedIndex < items.Count-1)
{
focusedItem.Focused = false;
focusedItem.Selected = false;
focusedIndex++;
items[focusedIndex].Focused = true;
items[focusedIndex].Selected = true;
focusedItem = items[focusedIndex];
MakeSelectedVisible();
Invalidate(this.ClientRectangle);
}
return true;
}
else if (keyData == Keys.Up)
{
if (focusedIndex > 0)
{
focusedItem.Focused = false;
focusedItem.Selected = false;
focusedIndex--;
items[focusedIndex].Focused = true;
items[focusedIndex].Selected = true;
focusedItem = items[focusedIndex];
MakeSelectedVisible();
Invalidate(this.ClientRectangle);
}
return true;
}
}
}
return base.PreProcessMessage(ref msg);
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (!isFocused)
{
this.Focus();
if (!captureFocusClick)
return;
}
lastClickedPoint = new Point(e.X, e.Y);
// determine if a header was pressed
if (headerStyle != ColumnHeaderStyle.None)
{
if (MouseInRect(e, headerRect) && e.Button == MouseButtons.Left)
{
for (int i=0; i<columns.Count; i++)
{
columns[i].Pressed = false;
if (MouseInRect(e, columnSizeRects[i]) && items.Count > 0)
{
if (columns[i].ScaleStyle == ColumnScaleStyle.Slide)
{
// autosize column
if (e.Clicks == 2 && e.Button == MouseButtons.Left && items.Count > 0)
{
int mwid = 0;
int twid = 0;
for (int j=0; j<items.Count; j++)
{
if (i > 0 && items[j].SubItems.Count > 0)
twid = GetStringWidth(items[j].SubItems[i-1].Text) + 10;
else if (i == 0)
twid = GetStringWidth(items[j].Text) + 10;
twid += 5;
if (twid > mwid)
mwid = twid;
}
twid = GetStringWidth(columns[i].Text);
if (twid > mwid)
mwid = twid;
mwid += 5;
columns[i].Width = mwid;
}
// scale column
else
{
colScaleMode = true;
colScaleWid = columnRects[i].Width;
scaledCol = i;
}
}
}
else if (MouseInRect(e, columnRects[i]) && !MouseInRect(e, columnSizeRects[i]))
{
columns[i].Pressed = true;
lastColPressed = i;
}
}
Invalidate();
return;
}
}
// determine if a row was pressed
bool selChange = false;
if (e.Button == MouseButtons.Left || e.Button == MouseButtons.Right)
{
if (MouseInRect(e, rowsRect) && items.Count>0)
{
GenerateRowRects();
//focusedIndex = -1;
if (multiSelectMode == MultiSelectMode.Single)
{
selectedIndices.Clear();
selectedItems.Clear();
for (int i=0; i<items.Count; i++)
{
items[i].Focused = false;
items[i].Selected = false;
if (MouseInRect(e, rowRects[i]))
{
items[i].Focused = true;
items[i].Selected = true;
focusedIndex = firstSelected = i;
// set selected items and indices collections
selectedIndices.Add(i);
selectedItems.Add(items[i]);
MakeSelectedVisible();
}
}
OnSelectedIndexChanged(new EventArgs());
}
else if (multiSelectMode == MultiSelectMode.Range)
{
for (int i=0; i<items.Count; i++)
{
if (firstSelected == -1)
{
items[i].Focused = true;
items[i].Selected = true;
firstSelected = focusedIndex = i;
// set selected items and indices collections
selectedIndices.Clear();
selectedIndices.Add(i);
selectedItems.Clear();
selectedItems.Add(items[i]);
MakeSelectedVisible();
OnSelectedIndexChanged(new EventArgs());
}
else
{
// unfocus the previously focused item
if (focusedIndex >= 0 && focusedIndex < items.Count)
items[focusedIndex].Focused = false;
if (MouseInRect(e, rowRects[i]))
{
lastSelected = focusedIndex = i;
}
if (lastSelected >= 0 && lastSelected < firstSelected)
{
selectedIndices.Clear();
selectedItems.Clear();
for (int j=0; j<items.Count; j++)
{
if (j <= firstSelected && j >= lastSelected)
{
items[j].Selected = true;
// set selected items and indices collections
selectedIndices.Add(j);
selectedItems.Add(items[j]);
selChange = true;
}
else
items[j].Selected = false;
if (j == lastSelected)
items[j].Focused = true;
else
items[j].Focused = false;
}
}
else if (lastSelected >= 0 && lastSelected > firstSelected)
{
selectedIndices.Clear();
selectedItems.Clear();
for (int j=0; j<items.Count; j++)
{
if (j >= firstSelected && j <= lastSelected)
{
items[j].Selected = true;
// set selected items and indices collections
selectedIndices.Add(j);
selectedItems.Add(items[j]);
selChange = true;
}
else
items[j].Selected = false;
if (j == lastSelected)
items[j].Focused = true;
else
items[j].Focused = false;
}
}
else
{
selectedIndices.Clear();
selectedItems.Clear();
for (int j=0; j<items.Count; j++)
{
if (j == firstSelected && j == lastSelected)
{
items[j].Selected = true;
items[j].Focused = true;
selectedIndices.Add(j);
selectedItems.Add(items[j]);
selChange = true;
}
else
{
items[j].Selected = false;
items[j].Focused = false;
}
}
}
}
if (selChange)
{
MakeSelectedVisible();
OnSelectedIndexChanged(new EventArgs());
}
}
}
else if (multiSelectMode == MultiSelectMode.Selective)
{
for (int i=0; i<items.Count; i++)
{
if (MouseInRect(e, rowRects[i]))
{
// unfocus the previously focused item
if (focusedIndex >= 0 && focusedIndex < items.Count)
items[focusedIndex].Focused = false;
if (items[i].Selected)
{
items[i].Focused = false;
items[i].Selected = false;
selectedIndices.Remove(i);
selectedItems.Remove(items[i]);
MakeSelectedVisible();
OnSelectedIndexChanged(new EventArgs());
}
else
{
items[i].Focused = true;
items[i].Selected = true;
selectedIndices.Add(i);
selectedItems.Add(items[i]);
MakeSelectedVisible();
OnSelectedIndexChanged(new EventArgs());
}
focusedIndex = i;
}
}
}
if (focusedIndex >= 0)
focusedItem = items[focusedIndex];
else
focusedItem = null;
Invalidate();
return;
}
}
}
