add virtuallistview
This commit is contained in:
zeromus
parent
c680745810
commit
32cb295f7f
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@ -100,6 +100,9 @@
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<Compile Include="ViewportPanel.cs">
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<SubType>Component</SubType>
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</Compile>
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<Compile Include="VirtualListView.cs">
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<SubType>Component</SubType>
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</Compile>
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</ItemGroup>
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<ItemGroup>
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<EmbeddedResource Include="7z\arch\Test.bzip2.7z" />
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@ -0,0 +1,622 @@
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using System;
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using System.Windows.Forms;
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using System.ComponentModel;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using System.Drawing;
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namespace BizHawk
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{
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#region win32interop
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[StructLayout(LayoutKind.Sequential)]
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internal struct LVDISPINFO {
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public NMHDR hdr;
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public LVITEM item;
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}
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[StructLayout(LayoutKind.Sequential)]
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internal struct NMHDR {
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public int hwndFrom;
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public int idFrom;
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public int code;
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}
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[StructLayout(LayoutKind.Sequential)]
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internal struct RECT {
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public int left, top, right, bottom;
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}
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[StructLayout(LayoutKind.Sequential)]
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internal struct NMCUSTOMDRAWINFO {
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public NMHDR hdr;
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public uint dwDrawStage;
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public IntPtr hdc;
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public RECT rc;
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public int dwItemSpec;
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public uint uItemState;
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public int lItemlParam;
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}
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[StructLayout(LayoutKind.Sequential)]
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internal struct NMLVCUSTOMDRAW {
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public NMCUSTOMDRAWINFO nmcd;
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public int clrText;
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public int clrTextBk;
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public int iSubItem;
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}
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[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
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internal struct LVITEM {
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public uint mask;
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public int iItem;
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public int iSubItem;
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public uint state;
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public uint stateMask;
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public IntPtr pszText;
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public int cchTextMax;
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public int iImage;
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public IntPtr lParam;
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//#if (_WIN32_IE >= 0x0300)
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public int iIndent;
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//#endif
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//#if (_WIN32_WINNT >= 0x501)
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//public int iGroupId;
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//public uint cColumns;
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//public IntPtr puColumns;
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//#endif
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}
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[FlagsAttribute]
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enum CUSTOMDRAWRETURNFLAGS {
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CDRF_DODEFAULT = 0x00000000,
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CDRF_NEWFONT = 0x00000002,
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CDRF_SKIPDEFAULT = 0x00000004,
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CDRF_NOTIFYPOSTPAINT = 0x00000010,
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CDRF_NOTIFYITEMDRAW = 0x00000020,
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//#if (_WIN32_IE >= 0x0400)
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CDRF_NOTIFYSUBITEMDRAW = 0x00000020,//[sic]
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//#endif
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CDRF_NOTIFYPOSTERASE = 0x00000040,
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}
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[FlagsAttribute]
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enum CUSTOMDRAWDRAWSTAGEFLAGS {
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CDDS_PREPAINT = 0x00000001,
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CDDS_POSTPAINT = 0x00000002,
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CDDS_PREERASE = 0x00000003,
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CDDS_POSTERASE = 0x00000004,
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// the 0x000010000 bit means it's individual item specific
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CDDS_ITEM = 0x00010000,
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CDDS_ITEMPREPAINT = (CDDS_ITEM | CDDS_PREPAINT),
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CDDS_ITEMPOSTPAINT = (CDDS_ITEM | CDDS_POSTPAINT),
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CDDS_ITEMPREERASE = (CDDS_ITEM | CDDS_PREERASE),
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CDDS_ITEMPOSTERASE = (CDDS_ITEM | CDDS_POSTERASE),
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//#if (_WIN32_IE >= 0x0400)
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CDDS_SUBITEM = 0x00020000,
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CDDS_SUBITEMPREPAINT = (CDDS_SUBITEM | CDDS_ITEMPREPAINT),
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CDDS_SUBITEMPOSTPAINT = (CDDS_SUBITEM | CDDS_ITEMPOSTPAINT),
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CDDS_SUBITEMPREERASE = (CDDS_SUBITEM | CDDS_ITEMPREERASE),
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CDDS_SUBITEMPOSTERASE = (CDDS_SUBITEM | CDDS_ITEMPOSTERASE),
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//#endif
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}
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[FlagsAttribute]
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enum LVHITTESTFLAGS {
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LVHT_NOWHERE = 0x0001,
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LVHT_ONITEMICON = 0x0002,
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LVHT_ONITEMLABEL = 0x0004,
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LVHT_ONITEMSTATEICON = 0x0008,
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LVHT_ONITEM = (LVHT_ONITEMICON | LVHT_ONITEMLABEL | LVHT_ONITEMSTATEICON),
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LVHT_ABOVE = 0x0008,
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LVHT_BELOW = 0x0010,
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LVHT_TORIGHT = 0x0020,
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LVHT_TOLEFT = 0x0040
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}
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[StructLayout(LayoutKind.Sequential)]
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internal struct POINT {
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public int x;
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public int y;
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}
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[StructLayout(LayoutKind.Sequential)]
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internal class LVHITTESTINFO {
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public POINT pt;
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public uint flags;
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public int iItem;
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public int iSubItem;
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}
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[StructLayout(LayoutKind.Sequential)]
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internal struct NMLISTVIEW {
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public NMHDR hdr;
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public int iItem;
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public int iSubItem;
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public uint uNewState;
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public uint uOldState;
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public uint uChanged;
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public POINT ptAction;
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public IntPtr lParam;
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}
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internal enum ListViewItemMask : short {
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LVIF_TEXT = 0x0001,
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LVIF_IMAGE = 0x0002,
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LVIF_PARAM = 0x0004,
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LVIF_STATE = 0x0008,
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LVIF_INDENT = 0x0010,
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LVIF_NORECOMPUTE = 0x0800,
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LVIF_GROUPID = 0x0100,
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LVIF_COLUMNS = 0x0200
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}
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internal enum LVNI {
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ALL = 0x0000,
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FOCUSED = 0x0001,
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SELECTED = 0x0002,
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CUT = 0x0004,
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DROPHILITED = 0x0008,
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ABOVE = 0x0100,
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BELOW = 0x0200,
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TOLEFT = 0x0400,
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TORIGHT = 0x0800
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}
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internal enum ListViewMessages {
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LVM_FIRST = 0x1000,
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LVM_GETITEMCOUNT = (LVM_FIRST + 4),
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LVM_SETCALLBACKMASK = (LVM_FIRST + 11),
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LVM_GETNEXTITEM = (LVM_FIRST + 12),
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LVM_HITTEST = (LVM_FIRST + 18),
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LVM_ENSUREVISIBLE = (LVM_FIRST + 19),
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LVM_SETITEMSTATE = (LVM_FIRST + 43),
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LVM_GETITEMSTATE = (LVM_FIRST + 44),
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LVM_SETITEMCOUNT = (LVM_FIRST + 47),
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LVM_GETSUBITEMRECT = (LVM_FIRST + 56)
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}
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internal enum ListViewStyles : short {
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LVS_OWNERDATA = 0x1000,
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LVS_SORTASCENDING = 0x0010,
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LVS_SORTDESCENDING = 0x0020,
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LVS_SHAREIMAGELISTS = 0x0040,
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LVS_NOLABELWRAP = 0x0080,
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LVS_AUTOARRANGE = 0x0100
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}
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internal enum ListViewStylesICF : uint {
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LVSICF_NOINVALIDATEALL = 0x00000001,
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LVSICF_NOSCROLL = 0x00000002
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}
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internal enum WindowsMessage : uint {
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WM_LBUTTONDOWN = 0x0201,
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WM_LBUTTONUP = 0x0202,
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WM_LBUTTONDBLCLK = 0x0203,
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WM_RBUTTONDOWN = 0x0204,
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WM_RBUTTONUP = 0x0205,
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WM_RBUTTONDBLCLK = 0x0206,
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WM_SETFOCUS = 0x0007,
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WM_NOTIFY = 0x004E,
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WM_USER = 0x0400,
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WM_REFLECT = WM_USER + 0x1c00
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}
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internal enum Notices : int {
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NM_FIRST = 0,
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NM_CUSTOMDRAW = NM_FIRST - 12
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}
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internal enum ListViewNotices : int {
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LVN_FIRST = (0 - 100),
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LVN_LAST = (0 - 199),
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LVN_BEGINDRAG = (int)LVN_FIRST - 9,
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LVN_BEGINRDRAG = (int)LVN_FIRST - 11,
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LVN_GETDISPINFOA = (int)LVN_FIRST - 50,
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LVN_GETDISPINFOW = (int)LVN_FIRST - 77,
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LVN_SETDISPINFOA = (int)LVN_FIRST - 51,
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LVN_SETDISPINFOW = (int)LVN_FIRST - 78,
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LVN_ODCACHEHINT = (int)LVN_FIRST - 13,
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LVN_ODFINDITEMW = (int)LVN_FIRST - 79
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}
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[Flags]
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internal enum ListViewCallBackMask : uint {
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LVIS_FOCUSED = 0x0001,
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LVIS_SELECTED = 0x0002,
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LVIS_CUT = 0x0004,
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LVIS_DROPHILITED = 0x0008,
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LVIS_GLOW = 0x0010,
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LVIS_ACTIVATING = 0x0020,
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LVIS_OVERLAYMASK = 0x0F00,
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LVIS_STATEIMAGEMASK = 0xF000,
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}
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internal struct WindowsFunction {
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[DllImport("user32.dll", CharSet = CharSet.Auto)]
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public static extern int SendMessage(IntPtr hWnd, int msg, int wParam, int lParam);
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}
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#endregion
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#region VirtualListView Delegates
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/// <summary>
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/// Retrieve the background color for a Listview cell (item and subitem).
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/// </summary>
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/// <param name="item">Listview item (row).</param>
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/// <param name="subItem">Listview subitem (column).</param>
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/// <param name="color">Background color to use</param>
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public delegate void QueryItemBkColorHandler(int item, int subItem, ref Color color);
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/// <summary>
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/// Retrieve the text for a Listview cell (item and subitem).
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/// </summary>
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/// <param name="item">Listview item (row).</param>
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/// <param name="subItem">Listview subitem (column).</param>
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/// <param name="text">Text to display.</param>
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public delegate void QueryItemTextHandler(int item, int subItem, out string text);
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/// <summary>
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/// Retrieve the image index for a Listview item.
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/// </summary>
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/// <param name="item">Listview item (row).</param>
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/// <param name="subItem">Listview subitem (column) - should always be zero.</param>
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/// <param name="imageIndex">Index of associated ImageList.</param>
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public delegate void QueryItemImageHandler(int item, int subItem, out int imageIndex);
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/// <summary>
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/// Retrieve the indent for a Listview item. The indent is always width of an image.
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/// For example, 1 indents the Listview item one image width.
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/// </summary>
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/// <param name="item">Listview item (row).</param>
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/// <param name="itemIndent">The amount to indent the Listview item.</param>
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public delegate void QueryItemIndentHandler(int item, out int itemIndent);
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public delegate void QueryItemHandler(int idx, out ListViewItem item);
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#endregion
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/// <summary>
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/// VirtualListView is a virtual Listview which allows for a large number of items(rows)
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/// to be displayed. The virtual Listview contains very little actual information -
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/// mainly item selection and focus information.
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/// </summary>
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public class VirtualListView : ListView {
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// store the item count to prevent the call to SendMessage(LVM_GETITEMCOUNT)
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private int itemCount = 0;
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#region Display query callbacks
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/// <summary>
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/// Fire the QueryItemBkColor event which requests the background color for the passed Listview cell
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/// </summary>
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public event QueryItemBkColorHandler QueryItemBkColor;
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/// <summary>
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/// Fire the QueryItemText event which requests the text for the passed Listview cell.
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/// </summary>
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[Category("Data")]
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public event QueryItemTextHandler QueryItemText;
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/// <summary>
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/// Fire the QueryItemImage event which requests the ImageIndex for the passed Listview item.
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/// </summary>
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[Category("Data")]
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public event QueryItemImageHandler QueryItemImage;
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/// <summary>
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/// Fire the QueryItemIndent event which requests the indent for the passed Listview item.
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/// </summary>
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[Category("Data")]
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public event QueryItemIndentHandler QueryItemIndent;
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[Category("Data")]
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public event QueryItemHandler QueryItem;
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#endregion
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#region Properties
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/// <summary>
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/// Gets/sets the sets the virtual number of items to be displayed.
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/// </summary>
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[Category("Behavior")]
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public int ItemCount {
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get {
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return itemCount;
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}
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set {
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itemCount = value;
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// if the virtual item count is set before the handle is created
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// then the image lists don't get loaded properly
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if(!this.IsHandleCreated)
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return;
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SetVirtualItemCount();
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}
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}
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/// <summary>
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/// Gets/sets how list items are to be displayed.
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///
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/// Hide the ListView.View property.
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/// Virtual Listviews only allow Details or List.
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/// </summary>
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public new System.Windows.Forms.View View {
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get {
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return base.View;
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}
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set {
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if(value == View.LargeIcon ||
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value == View.SmallIcon) {
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throw new ArgumentException("Icon views are invalid for virtual ListViews", "View");
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}
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base.View = value;
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}
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}
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/// <summary>
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/// Gets the required creation parameters when the control handle is created.
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///
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/// Use LVS_OWNERDATA to set this as a virtual Listview.
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/// </summary>
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protected override System.Windows.Forms.CreateParams CreateParams {
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get {
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CreateParams cp = base.CreateParams;
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// LVS_OWNERDATA style must be set when the control is created
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cp.Style |= (int)ListViewStyles.LVS_OWNERDATA;
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return cp;
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}
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}
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#endregion
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#region Constructors
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/// <summary>
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/// Create a new instance of this control.
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/// </summary>
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public VirtualListView() {
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// virtual listviews must be Details or List view with no sorting
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View = View.Details;
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Sorting = SortOrder.None;
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ptrlvhti = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(LVHITTESTINFO)));
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SetStyle(ControlStyles.DoubleBuffer, true);
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SetStyle(ControlStyles.Opaque, true);
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}
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~VirtualListView() {
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Marshal.FreeHGlobal(ptrlvhti);
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}
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#endregion
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#region Methods
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/// <summary>
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/// Set the state of the passed Listview item's index.
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/// </summary>
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/// <param name="index">Listview item's index.</param>
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/// <param name="selected">Select the passed item?</param>
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public void SelectItem(int index, bool selected) {
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IntPtr ptrItem = IntPtr.Zero;
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try {
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// Determine whether selecting or unselecting.
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uint select = selected ? (uint)ListViewCallBackMask.LVIS_SELECTED : 0;
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// Fill in the LVITEM structure with state fields.
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LVITEM stateItem = new LVITEM();
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stateItem.mask = (uint)ListViewItemMask.LVIF_STATE;
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stateItem.iItem = index;
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stateItem.iSubItem = 0;
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stateItem.state = select;
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stateItem.stateMask = (uint)ListViewCallBackMask.LVIS_SELECTED;
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// Copy the structure to unmanaged memory.
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ptrItem = Marshal.AllocHGlobal(Marshal.SizeOf(stateItem.GetType()));
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Marshal.StructureToPtr(stateItem, ptrItem, true);
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// Send the message to the control window.
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int result = WindowsFunction.SendMessage(
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this.Handle,
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(int)ListViewMessages.LVM_SETITEMSTATE,
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index,
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ptrItem.ToInt32());
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} catch(Exception ex) {
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System.Diagnostics.Trace.WriteLine("VirtualListView.SetItemState error=" + ex.Message);
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// TODO: should this eat any exceptions?
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throw ex;
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} finally {
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// Always release the unmanaged memory.
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if(ptrItem != IntPtr.Zero) {
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Marshal.FreeHGlobal(ptrItem);
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}
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}
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}
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private void SetVirtualItemCount() {
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int result;
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result = WindowsFunction.SendMessage(
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this.Handle,
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(int)ListViewMessages.LVM_SETITEMCOUNT,
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itemCount,
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0);
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}
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protected void OnDispInfoNotice(ref Message m, bool useAnsi) {
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LVDISPINFO info = (LVDISPINFO)m.GetLParam(typeof(LVDISPINFO));
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string lvtext = null;
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if((info.item.mask & (uint)ListViewItemMask.LVIF_TEXT) > 0) {
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if(QueryItemText != null) {
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QueryItemText(info.item.iItem, info.item.iSubItem, out lvtext);
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if(lvtext != null) {
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try {
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int maxIndex = Math.Min(info.item.cchTextMax - 1, lvtext.Length);
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char[] data = new char[maxIndex + 1];
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lvtext.CopyTo(0, data, 0, lvtext.Length);
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data[maxIndex] = '\0';
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System.Runtime.InteropServices.Marshal.Copy(data, 0, info.item.pszText, data.Length);
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} catch(Exception e) {
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Debug.WriteLine("Failed to copy text name from client: " + e.ToString(), "VirtualListView.OnDispInfoNotice");
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}
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}
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}
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}
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if((info.item.mask & (uint)ListViewItemMask.LVIF_IMAGE) > 0) {
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int imageIndex = 0;
|
||||
if(QueryItemImage != null) {
|
||||
QueryItemImage(info.item.iItem, info.item.iSubItem, out imageIndex);
|
||||
}
|
||||
info.item.iImage = imageIndex;
|
||||
System.Runtime.InteropServices.Marshal.StructureToPtr(info, m.LParam, false);
|
||||
}
|
||||
|
||||
if((info.item.mask & (uint)ListViewItemMask.LVIF_INDENT) > 0) {
|
||||
int itemIndent = 0;
|
||||
if(QueryItemIndent != null) {
|
||||
QueryItemIndent(info.item.iItem, out itemIndent);
|
||||
}
|
||||
info.item.iIndent = itemIndent;
|
||||
System.Runtime.InteropServices.Marshal.StructureToPtr(info, m.LParam, false);
|
||||
}
|
||||
m.Result = new IntPtr(0);
|
||||
}
|
||||
|
||||
protected void OnCustomDrawNotice(ref System.Windows.Forms.Message m) {
|
||||
NMLVCUSTOMDRAW cd = (NMLVCUSTOMDRAW)m.GetLParam(typeof(NMLVCUSTOMDRAW));
|
||||
switch(cd.nmcd.dwDrawStage) {
|
||||
case (int)CUSTOMDRAWDRAWSTAGEFLAGS.CDDS_ITEMPREPAINT:
|
||||
case (int)CUSTOMDRAWDRAWSTAGEFLAGS.CDDS_PREPAINT:
|
||||
m.Result = new IntPtr((int)CUSTOMDRAWRETURNFLAGS.CDRF_NOTIFYSUBITEMDRAW);
|
||||
break;
|
||||
case (int)CUSTOMDRAWDRAWSTAGEFLAGS.CDDS_SUBITEMPREPAINT:
|
||||
Color color;
|
||||
if(QueryItemBkColor != null) {
|
||||
color = Color.FromArgb(cd.clrTextBk & 0xFF, (cd.clrTextBk >> 8) & 0xFF, (cd.clrTextBk >> 16) & 0xFF);
|
||||
QueryItemBkColor(cd.nmcd.dwItemSpec, cd.iSubItem, ref color);
|
||||
cd.clrTextBk = (color.B << 16) | (color.G << 8) | (color.R);
|
||||
System.Runtime.InteropServices.Marshal.StructureToPtr(cd, m.LParam, false);
|
||||
}
|
||||
m.Result = new IntPtr((int)CUSTOMDRAWRETURNFLAGS.CDRF_DODEFAULT);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
protected override void WndProc(ref System.Windows.Forms.Message m) {
|
||||
NMHDR nm1;
|
||||
bool messageProcessed = false;
|
||||
switch(m.Msg) {
|
||||
case (int)WindowsMessage.WM_REFLECT + (int)WindowsMessage.WM_NOTIFY:
|
||||
nm1 = (NMHDR)m.GetLParam(typeof(NMHDR));
|
||||
switch(nm1.code) {
|
||||
case (int)Notices.NM_CUSTOMDRAW:
|
||||
OnCustomDrawNotice(ref m);
|
||||
messageProcessed = true;
|
||||
break;
|
||||
case (int)ListViewNotices.LVN_GETDISPINFOW:
|
||||
OnDispInfoNotice(ref m, false);
|
||||
messageProcessed = true;
|
||||
break;
|
||||
case (int)ListViewNotices.LVN_BEGINDRAG:
|
||||
OnBeginItemDrag(MouseButtons.Left, ref m);
|
||||
messageProcessed = true;
|
||||
break;
|
||||
case (int)ListViewNotices.LVN_BEGINRDRAG:
|
||||
OnBeginItemDrag(MouseButtons.Right, ref m);
|
||||
messageProcessed = true;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
if(!messageProcessed) {
|
||||
try {
|
||||
base.WndProc(ref m);
|
||||
} catch(Exception ex) {
|
||||
Trace.WriteLine(string.Format("Message {0} caused an exception: {1}", m, ex.Message));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
protected ListViewItem GetItem(int idx) {
|
||||
ListViewItem item = null;
|
||||
if(QueryItem != null) {
|
||||
QueryItem(idx, out item);
|
||||
}
|
||||
if(item == null) {
|
||||
throw new ArgumentException("cannot find item " + idx.ToString() + " via QueryItem event");
|
||||
}
|
||||
return item;
|
||||
}
|
||||
|
||||
protected void OnBeginItemDrag(MouseButtons mouseButton, ref System.Windows.Forms.Message m) {
|
||||
NMLISTVIEW info = (NMLISTVIEW)m.GetLParam(typeof(NMLISTVIEW));
|
||||
ListViewItem item = null;
|
||||
if(QueryItem != null) {
|
||||
QueryItem(info.iItem, out item);
|
||||
}
|
||||
OnItemDrag(new ItemDragEventArgs(mouseButton, item));
|
||||
}
|
||||
|
||||
protected override void OnHandleCreated(System.EventArgs e) {
|
||||
base.OnHandleCreated(e);
|
||||
// ensure the value for ItemCount is sent to the control properly if the user set it
|
||||
// before the handle was created
|
||||
SetVirtualItemCount();
|
||||
}
|
||||
|
||||
protected override void OnHandleDestroyed(System.EventArgs e) {
|
||||
// the ListView OnHandleDestroyed accesses the Items list for all selected items
|
||||
ItemCount = 0;
|
||||
base.OnHandleDestroyed(e);
|
||||
}
|
||||
#endregion
|
||||
|
||||
LVHITTESTINFO lvhti = new LVHITTESTINFO();
|
||||
IntPtr ptrlvhti;
|
||||
int selection = -1;
|
||||
|
||||
public int hitTest(int x, int y) {
|
||||
lvhti.pt.x = x;
|
||||
lvhti.pt.y = y;
|
||||
Marshal.StructureToPtr(lvhti, ptrlvhti, true);
|
||||
int z = WindowsFunction.SendMessage(this.Handle, (int)ListViewMessages.LVM_HITTEST, 0, ptrlvhti.ToInt32());
|
||||
Marshal.PtrToStructure(ptrlvhti, lvhti);
|
||||
return z;
|
||||
}
|
||||
|
||||
public void ensureVisible(int index) {
|
||||
WindowsFunction.SendMessage(Handle, (int)ListViewMessages.LVM_ENSUREVISIBLE, index, 1);
|
||||
}
|
||||
|
||||
public void ensureVisible() {
|
||||
ensureVisible(selectedItem);
|
||||
}
|
||||
|
||||
public void setSelection(int index) {
|
||||
clearSelection();
|
||||
selection = index;
|
||||
SelectItem(selection, true);
|
||||
}
|
||||
|
||||
public int selectedItem { get { if(SelectedIndices.Count == 0) return -1; else return SelectedIndices[0]; } set { setSelection(value); } }
|
||||
|
||||
public void clearSelection() {
|
||||
if(selection != -1)
|
||||
SelectItem(selection, false);
|
||||
selection = -1;
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue