mirror of
https://github.com/xcp-ng/xenadmin.git
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254 lines
9.3 KiB
C#
254 lines
9.3 KiB
C#
/* Copyright (c) Citrix Systems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Drawing;
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using System.Windows.Forms;
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namespace XenAdmin.Controls.CustomGridView
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{
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public class GridHeaderItem : GridStringItem
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{
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public const int ResizeGutter = 3; // the space between the columns within which we resize the columns rather than dragging them
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private static readonly Image AscendingTriangle = Properties.Resources.ascending_triangle;
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private static readonly Image DescendingTriangle = Properties.Resources.descending_triangle;
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private static readonly Font SortFont = new Font(Program.DefaultFont.FontFamily, 7.0f);
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private static readonly Pen LinePen = Pens.LightSteelBlue;
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public readonly int MinimumWidth;
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private readonly SortOrder defaultSortOrder;
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public SortOrder Sort = SortOrder.None;
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public int SortPriority = -1;
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public bool IsDefaultSortColumn;
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public bool GreyOut;
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public bool Immovable;
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public bool UnSizable;
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private int width;
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private String columnName;
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public GridHeaderItem(HorizontalAlignment hAlign, VerticalAlignment vAlign, Brush foreBrush,
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Font font, String text, SortOrder defaultSortOrder, int width, int minwidth, Brush hotbrush)
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: base(text, hAlign, vAlign, false, false, foreBrush, font, hotbrush, font)
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{
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this.defaultSortOrder = defaultSortOrder;
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this.width = width;
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MinimumWidth = minwidth;
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}
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public String ColumnName
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{
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get
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{
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return columnName;
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}
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set
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{
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columnName = value;
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}
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}
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public int Width
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{
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get
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{
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return width;
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}
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set
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{
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width = value;
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}
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}
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public override void OnPaint(ItemPaintArgs itemPaintArgs)
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{
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if (!string.IsNullOrEmpty(sortdata.ToString()))
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{
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base.OnPaint(itemPaintArgs);
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DrawGlyphs(itemPaintArgs);
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}
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}
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public void DrawGlyphs(ItemPaintArgs itemPaintArgs)
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{
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Graphics g = itemPaintArgs.Graphics;
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if (SortPriority > -1 && itemPaintArgs.Rectangle.Width - (AscendingTriangle.Width + 16) > 0)
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{
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// Draw the number showing the precedence of sorting in this column versus sorting in other columns
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g.DrawString((SortPriority + 1).ToString(), SortFont, foreBrush, itemPaintArgs.Rectangle.Right - (AscendingTriangle.Width + 15), itemPaintArgs.Rectangle.Top + ((itemPaintArgs.Rectangle.Height / 2) - 7));
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}
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if (Sort != SortOrder.None && itemPaintArgs.Rectangle.Width - (AscendingTriangle.Width + 5) > 0)
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{
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// Draw the triangle showing ascending/descending sort order
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DrawTriangle(g, Sort == SortOrder.Ascending ? AscendingTriangle : DescendingTriangle, itemPaintArgs);
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}
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DrawSideLine(g, itemPaintArgs, itemPaintArgs.Rectangle.Left - 1);
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DrawSideLine(g, itemPaintArgs, itemPaintArgs.Rectangle.Right - 1);
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}
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private void DrawSideLine(Graphics g, ItemPaintArgs itemPaintArgs, int x)
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{
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g.DrawLine(LinePen, x, itemPaintArgs.Rectangle.Top, x, itemPaintArgs.Rectangle.Bottom - 1);
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}
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private void DrawTriangle(Graphics g, Image triangle, ItemPaintArgs itemPaintArgs)
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{
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g.DrawImageUnscaled(triangle, itemPaintArgs.Rectangle.Right - triangle.Width - 5, itemPaintArgs.Rectangle.Top + ((itemPaintArgs.Rectangle.Height - triangle.Height) / 2), triangle.Width, triangle.Height);
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}
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public override void OnEnter(Point p)
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{
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if (!Immovable && !string.IsNullOrEmpty(sortdata.ToString()))
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{
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Hot = true;
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Row.GridView.Refresh();
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}
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}
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public override void OnMouseMove(Point p)
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{
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if ((!UnSizable && (p.X >= CurrentRectangle.Width - ResizeGutter && p.X <= CurrentRectangle.Width)) || (!PreviousUnsizable() && (p.X < ResizeGutter && p.X >= 0)))
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Row.Cursor = Cursors.SizeWE;
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else
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Row.Cursor = Cursors.Hand;
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}
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private bool PreviousUnsizable()
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{
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GridHeaderRow hr = (GridHeaderRow)Row;
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int tindex = hr.Columns.IndexOf(ColumnName);
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if (tindex <= 0)
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return true;
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string tother = hr.Columns[tindex - 1];
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GridItemBase prevItem;
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if (!hr.Items.TryGetValue(tother, out prevItem))
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return true;
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GridHeaderItem prevHeader = prevItem as GridHeaderItem;
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if (prevHeader == null)
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return true;
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return prevHeader.UnSizable;
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}
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public override void OnLeave()
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{
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if (!string.IsNullOrEmpty(sortdata.ToString()))
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{
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Row.Cursor = Cursors.Default;
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Hot = false;
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Row.GridView.Refresh();
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}
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}
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public override void OnClick(Point p)
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{
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if (!string.IsNullOrEmpty(sortdata.ToString()))
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{
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NextSort();
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Row.GridView.Sort();
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Row.GridView.Refresh();
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}
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}
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/// <summary>
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/// Changes the sort order of this column to the next value
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/// </summary>
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private void NextSort()
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{
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switch (Sort)
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{
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case SortOrder.None:
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SetSort(defaultSortOrder);
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break;
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case SortOrder.Ascending:
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SetSort(defaultSortOrder == SortOrder.Ascending ? SortOrder.Descending : SortOrder.None);
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break;
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case SortOrder.Descending:
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SetSort(defaultSortOrder == SortOrder.Ascending ? SortOrder.None : SortOrder.Ascending);
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break;
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}
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}
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private void SetSort(SortOrder sortOrder)
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{
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GridHeaderRow ghr = (GridHeaderRow)Row;
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int oldPriority = SortPriority;
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SortOrder oldSort = Sort;
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Sort = sortOrder;
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if (Sort == SortOrder.None) // removing sorting from this column
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{
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SortPriority = -1;
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foreach (GridHeaderItem other in ghr.Items.Values)
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{
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if (other != this && other.SortPriority > oldPriority)
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other.SortPriority--;
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}
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}
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else if (oldSort == SortOrder.None) // starting to apply sorting to this column
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{
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SortPriority = 0;
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foreach (GridHeaderItem other in ghr.Items.Values)
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{
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if (other != this && other.SortPriority > -1)
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other.SortPriority++;
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}
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}
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ghr.UpdateCompareOrder();
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}
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// When using this function, it is the caller's responsibility to
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// make sure all the columns have a consistent set of priorities
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internal void SetSort(int priority, SortOrder sortOrder)
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{
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SortPriority = priority;
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Sort = sortOrder;
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}
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// When using this function, it is the caller's responsibility to
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// make sure all the columns have a consistent set of priorities
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internal void UnsetSort()
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{
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SortPriority = -1;
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Sort = SortOrder.None;
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}
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}
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}
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