// the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
// Boston, MA 02110-1301, USA.
+#nullable enable
+
using System;
using System.Collections.Generic;
using System.Linq;
{
private Rectangle changeBounds;
- public ContextMenuStrip ColumnHeaderContextMenuStrip { get; set; }
+ public ContextMenuStrip? ColumnHeaderContextMenuStrip { get; set; }
- public event EventHandler VScrolled;
- public event EventHandler HScrolled;
+ public event EventHandler? VScrolled;
+ public event EventHandler? HScrolled;
public DetailsListView()
{
DoubleBuffered = true;
}
- //[System.ComponentModel.DefaultValue(0),
- // System.ComponentModel.RefreshProperties(System.ComponentModel.RefreshProperties.Repaint)]
- //public new int VirtualListSize
- //{
- // get { return base.VirtualListSize; }
- // set
- // {
- // if (value == base.VirtualListSize) return;
- // if (base.VirtualListSize > 0 && value > 0)
- // {
- // int topIndex = 0;
- // if (!this.IsDisposed)
- // {
- // if (base.VirtualListSize < value)
- // {
- // if (this.TopItem == null)
- // {
- // topIndex = 0;
- // }
- // else
- // {
- // topIndex = this.TopItem.Index;
- // }
- // topIndex = Math.Min(topIndex, Math.Abs(value - 1));
- // this.TopItem = this.Items[topIndex];
- // }
- // else
- // {
- // if (this.TopItem == null)
- // {
- // topIndex = 0;
- // }
- // else
- // {
- //
- // }
- // this.TopItem = this.Items[0];
- // }
- // }
- // }
- // base.VirtualListSize = value;
- // }
- //}
-
/// <summary>
/// 複数選択時の起点になるアイテム (selection mark) の位置を取得・設定する
/// </summary>
this.OnSelectedIndexChanged(EventArgs.Empty);
}
- public void ChangeItemBackColor(int index, Color backColor)
- => this.ChangeSubItemBackColor(index, 0, backColor);
-
- public void ChangeItemForeColor(int index, Color foreColor)
- => this.ChangeSubItemForeColor(index, 0, foreColor);
-
- public void ChangeItemFont(int index, Font fnt)
- => this.ChangeSubItemFont(index, 0, fnt);
-
- public void ChangeItemFontAndColor(int index, Color foreColor, Font fnt)
- => this.ChangeSubItemStyles(index, 0, BackColor, foreColor, fnt);
-
- public void ChangeItemStyles(int index, Color backColor, Color foreColor, Font fnt)
- => this.ChangeSubItemStyles(index, 0, backColor, foreColor, fnt);
-
- public void ChangeSubItemBackColor(int itemIndex, int subitemIndex, Color backColor)
+ public void ChangeItemBackColor(ListViewItem item, Color backColor)
{
- var item = this.Items[itemIndex];
- item.SubItems[subitemIndex].BackColor = backColor;
- SetUpdateBounds(item, subitemIndex);
- this.Update();
- this.changeBounds = Rectangle.Empty;
- }
+ if (item.BackColor == backColor)
+ return;
- public void ChangeSubItemForeColor(int itemIndex, int subitemIndex, Color foreColor)
- {
- var item = this.Items[itemIndex];
- item.SubItems[subitemIndex].ForeColor = foreColor;
- SetUpdateBounds(item, subitemIndex);
- this.Update();
- this.changeBounds = Rectangle.Empty;
+ item.BackColor = backColor;
+ this.RefreshItemBounds(item);
}
- public void ChangeSubItemFont(int itemIndex, int subitemIndex, Font fnt)
+ public void ChangeItemForeColor(ListViewItem item, Color foreColor)
{
- var item = this.Items[itemIndex];
- item.SubItems[subitemIndex].Font = fnt;
- SetUpdateBounds(item, subitemIndex);
- this.Update();
- this.changeBounds = Rectangle.Empty;
- }
+ if (item.ForeColor == foreColor)
+ return;
- public void ChangeSubItemFontAndColor(int itemIndex, int subitemIndex, Color foreColor, Font fnt)
- {
- var item = this.Items[itemIndex];
- var subItem = item.SubItems[subitemIndex];
- subItem.ForeColor = foreColor;
- subItem.Font = fnt;
- SetUpdateBounds(item, subitemIndex);
- this.Update();
- this.changeBounds = Rectangle.Empty;
+ item.ForeColor = foreColor;
+ this.RefreshItemBounds(item);
}
- public void ChangeSubItemStyles(int itemIndex, int subitemIndex, Color backColor, Color foreColor, Font fnt)
+ public void ChangeItemFontAndColor(ListViewItem item, Color foreColor, Font fnt)
{
- var item = this.Items[itemIndex];
- var subItem = item.SubItems[subitemIndex];
- subItem.BackColor = backColor;
- subItem.ForeColor = foreColor;
- subItem.Font = fnt;
- SetUpdateBounds(item, subitemIndex);
- this.Update();
- this.changeBounds = Rectangle.Empty;
+ if (item.ForeColor == foreColor && item.Font.Equals(fnt))
+ return;
+
+ item.ForeColor = foreColor;
+ item.Font = fnt;
+ this.RefreshItemBounds(item);
}
- private void SetUpdateBounds(ListViewItem item, int subItemIndex)
+ private void RefreshItemBounds(ListViewItem item)
{
try
{
- if (subItemIndex > this.Columns.Count)
- {
- throw new ArgumentOutOfRangeException(nameof(subItemIndex));
- }
- if (item.UseItemStyleForSubItems)
- {
- this.changeBounds = item.Bounds;
- }
- else
- {
- this.changeBounds = this.GetSubItemBounds(item, subItemIndex);
- }
+ var itemBounds = item.Bounds;
+ var drawBounds = Rectangle.Intersect(this.ClientRectangle, itemBounds);
+ if (drawBounds == Rectangle.Empty)
+ return;
+
+ this.changeBounds = drawBounds;
+ this.Update();
+ this.changeBounds = Rectangle.Empty;
}
catch (ArgumentException)
{
}
}
- private Rectangle GetSubItemBounds(ListViewItem item, int subitemIndex)
- {
- if (subitemIndex == 0 && this.Columns.Count > 0)
- {
- Rectangle col0 = item.Bounds;
- return new Rectangle(col0.Left, col0.Top, item.SubItems[1].Bounds.X + 1, col0.Height);
- }
- else
- {
- return item.SubItems[subitemIndex].Bounds;
- }
- }
-
[StructLayout(LayoutKind.Sequential)]
private struct NMHDR
{
const long LVSICF_NOSCROLL = 0x2;
const long LVSICF_NOINVALIDATEALL = 0x1;
- int hPos = -1;
- int vPos = -1;
+ var hPos = -1;
+ var vPos = -1;
switch (m.Msg)
{