mirror of https://github.com/dahall/Vanara.git
447 lines
17 KiB
C#
447 lines
17 KiB
C#
using System;
|
|
using System.ComponentModel;
|
|
using System.Drawing;
|
|
using System.Windows.Forms;
|
|
using System.Windows.Forms.VisualStyles;
|
|
using Vanara.Drawing;
|
|
using Vanara.Extensions;
|
|
using static Vanara.PInvoke.ComCtl32;
|
|
using static Vanara.PInvoke.UxTheme;
|
|
using static Vanara.PInvoke.Macros;
|
|
using static Vanara.PInvoke.User32;
|
|
using ComboBoxStyle = System.Windows.Forms.ComboBoxStyle;
|
|
|
|
namespace Vanara.Windows.Forms
|
|
{
|
|
/// <summary>Interface that exposes an <c>Enabled</c> property for an item supplied to <see cref="DisabledItemComboBox"/>.</summary>
|
|
public interface IEnableable
|
|
{
|
|
/// <summary>Gets a value indicating whether an item is enabled.</summary>
|
|
/// <value><c>true</c> if enabled; otherwise, <c>false</c>.</value>
|
|
bool Enabled { get; }
|
|
}
|
|
|
|
/// <summary>A version of <see cref="ComboBox"/> that allows for disabled items.</summary>
|
|
[ToolboxBitmap(typeof(DisabledItemComboBox), "Control")]
|
|
public class DisabledItemComboBox : ComboBox
|
|
{
|
|
private const TextFormatFlags tff = TextFormatFlags.Default | TextFormatFlags.VerticalCenter | TextFormatFlags.SingleLine | TextFormatFlags.NoPadding;
|
|
|
|
private bool animationsNeedCleanup;
|
|
private ComboBoxState currentState = ComboBoxState.Normal, newState = ComboBoxState.Normal;
|
|
private ListBoxNativeWindow dropDownWindow;
|
|
private readonly VisualStyleRenderer vsr;
|
|
|
|
/// <summary>Initializes a new instance of the <see cref="DisabledItemComboBox"/> class.</summary>
|
|
public DisabledItemComboBox()
|
|
{
|
|
SetStyle(/*ControlStyles.Opaque |*/ ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint, true);
|
|
DrawMode = DrawMode.OwnerDrawFixed;
|
|
DropDownStyle = ComboBoxStyle.DropDownList;
|
|
if (Environment.OSVersion.Version.Major >= 6 && VisualStyleRenderer.IsSupported && Application.RenderWithVisualStyles)
|
|
vsr = new VisualStyleRenderer("COMBOBOX", 5, 0);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets or sets a value indicating whether your code or the operating system will handle drawing of elements in the list.
|
|
/// </summary>
|
|
/// <returns>One of the <see cref="T:System.Windows.Forms.DrawMode"/> enumeration values. The default is <see cref="F:System.Windows.Forms.DrawMode.Normal"/>.</returns>
|
|
/// <PermissionSet><IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true"/><IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true"/><IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence"/><IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true"/></PermissionSet>
|
|
[DefaultValue(DrawMode.OwnerDrawFixed), Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
|
|
public new DrawMode DrawMode
|
|
{
|
|
get => base.DrawMode;
|
|
set => base.DrawMode = value;
|
|
}
|
|
|
|
/// <summary>Gets or sets a value specifying the style of the combo box.</summary>
|
|
/// <returns>One of the <see cref="T:System.Windows.Forms.ComboBoxStyle"/> values. The default is DropDown.</returns>
|
|
/// <PermissionSet><IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true"/><IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true"/><IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence"/><IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true"/></PermissionSet>
|
|
[DefaultValue(ComboBoxStyle.DropDownList), Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
|
|
public new ComboBoxStyle DropDownStyle
|
|
{
|
|
get => base.DropDownStyle;
|
|
set => base.DropDownStyle = value;
|
|
}
|
|
|
|
/// <summary>Gets or sets the state of the combobox.</summary>
|
|
/// <value>The state.</value>
|
|
private ComboBoxState State
|
|
{
|
|
get => currentState;
|
|
set
|
|
{
|
|
var diff = !Equals(currentState, value);
|
|
newState = value;
|
|
if (diff)
|
|
{
|
|
if (animationsNeedCleanup && IsHandleCreated && !IsDisposed)
|
|
BufferedPaintStopAllAnimations(Handle);
|
|
Invalidate();
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>Determines whether an item is enabled.</summary>
|
|
/// <param name="idx">The index of the item.</param>
|
|
/// <returns><c>true</c> if enabled; otherwise, <c>false</c>.</returns>
|
|
public bool IsItemEnabled(int idx) => !(idx > -1 && idx < Items.Count && Items[idx] is IEnableable && !((IEnableable)Items[idx]).Enabled);
|
|
|
|
/// <summary>
|
|
/// Releases the unmanaged resources used by the <see cref="T:System.Windows.Forms.ComboBox"/> and optionally releases the managed resources.
|
|
/// </summary>
|
|
/// <param name="disposing">true to release both managed and unmanaged resources; false to release only unmanaged resources.</param>
|
|
protected override void Dispose(bool disposing)
|
|
{
|
|
if (animationsNeedCleanup && !IsDisposed)
|
|
{
|
|
BufferedPaintUnInit();
|
|
animationsNeedCleanup = false;
|
|
}
|
|
base.Dispose(disposing);
|
|
}
|
|
|
|
/// <summary>Raises the <see cref="E:System.Windows.Forms.ComboBox.DrawItem"/> event.</summary>
|
|
/// <param name="e">A <see cref="T:System.Windows.Forms.DrawItemEventArgs"/> that contains the event data.</param>
|
|
protected override void OnDrawItem(DrawItemEventArgs e)
|
|
{
|
|
var itemString = e.Index >= 0 ? GetItemText(Items[e.Index]) : string.Empty;
|
|
|
|
if ((e.State & DrawItemState.ComboBoxEdit) != DrawItemState.ComboBoxEdit)
|
|
{
|
|
if (e.Index >= 0)
|
|
{
|
|
var iEnabled = IsItemEnabled(e.Index);
|
|
if (iEnabled)
|
|
{
|
|
e.DrawBackground();
|
|
e.DrawFocusRectangle();
|
|
}
|
|
else
|
|
{
|
|
using (var bb = new SolidBrush(e.BackColor))
|
|
e.Graphics.FillRectangle(bb, e.Bounds);
|
|
}
|
|
TextRenderer.DrawText(e.Graphics, itemString, e.Font, Rectangle.Inflate(e.Bounds, -2, 0), iEnabled ? e.ForeColor : SystemColors.GrayText, tff);
|
|
}
|
|
}
|
|
base.OnDrawItem(e);
|
|
}
|
|
|
|
/// <summary>Raises the <see cref="E:System.Windows.Forms.ComboBox.DropDown"/> event.</summary>
|
|
/// <param name="e">An <see cref="T:System.EventArgs"/> that contains the event data.</param>
|
|
protected override void OnDropDown(EventArgs e)
|
|
{
|
|
base.OnDropDown(e);
|
|
State = ComboBoxState.Pressed;
|
|
}
|
|
|
|
/// <summary>Raises the <see cref="E:System.Windows.Forms.ComboBox.DropDownClosed"/> event.</summary>
|
|
/// <param name="e">An <see cref="T:System.EventArgs"/> that contains the event data.</param>
|
|
protected override void OnDropDownClosed(EventArgs e)
|
|
{
|
|
base.OnDropDownClosed(e);
|
|
State = ComboBoxState.Normal;
|
|
}
|
|
|
|
/// <summary>Raises the <see cref="E:System.Windows.Forms.Control.HandleCreated"/> event.</summary>
|
|
/// <param name="e">An <see cref="T:System.EventArgs"/> that contains the event data.</param>
|
|
protected override void OnHandleCreated(EventArgs e)
|
|
{
|
|
base.OnHandleCreated(e);
|
|
if (vsr != null)
|
|
{
|
|
BufferedPaintInit();
|
|
animationsNeedCleanup = true;
|
|
}
|
|
}
|
|
|
|
/// <summary>Raises the <see cref="E:System.Windows.Forms.Control.HandleDestroyed"/> event.</summary>
|
|
/// <param name="e">An <see cref="T:System.EventArgs"/> that contains the event data.</param>
|
|
protected override void OnHandleDestroyed(EventArgs e)
|
|
{
|
|
dropDownWindow?.ReleaseHandle();
|
|
dropDownWindow = null;
|
|
base.OnHandleDestroyed(e);
|
|
}
|
|
|
|
/// <summary>Raises the <see cref="E:System.Windows.Forms.Control.KeyPress"/> event.</summary>
|
|
/// <param name="e">A <see cref="T:System.Windows.Forms.KeyPressEventArgs"/> that contains the event data.</param>
|
|
protected override void OnKeyPress(KeyPressEventArgs e)
|
|
{
|
|
var idx = FindEnabledString(e.KeyChar.ToString(), SelectedIndex);
|
|
if (idx == -1 || idx == SelectedIndex)
|
|
e.Handled = true;
|
|
base.OnKeyPress(e);
|
|
}
|
|
|
|
/// <summary>Raises the <see cref="E:System.Windows.Forms.Control.LostFocus"/> event.</summary>
|
|
/// <param name="e">An <see cref="T:System.EventArgs"/> that contains the event data.</param>
|
|
protected override void OnLostFocus(EventArgs e)
|
|
{
|
|
base.OnLostFocus(e);
|
|
Invalidate();
|
|
}
|
|
|
|
/// <summary>Raises the <see cref="E:System.Windows.Forms.Control.MouseDown"/> event.</summary>
|
|
/// <param name="e">A <see cref="T:System.Windows.Forms.MouseEventArgs"/> that contains the event data.</param>
|
|
protected override void OnMouseDown(MouseEventArgs e)
|
|
{
|
|
base.OnMouseDown(e);
|
|
State = ComboBoxState.Pressed;
|
|
}
|
|
|
|
/// <summary>Raises the <see cref="E:System.Windows.Forms.Control.MouseEnter"/> event.</summary>
|
|
/// <param name="e">An <see cref="T:System.EventArgs"/> that contains the event data.</param>
|
|
protected override void OnMouseEnter(EventArgs e)
|
|
{
|
|
base.OnMouseEnter(e);
|
|
State = ComboBoxState.Hot;
|
|
}
|
|
|
|
/// <summary>Raises the <see cref="E:System.Windows.Forms.Control.MouseLeave"/> event.</summary>
|
|
/// <param name="e">An <see cref="T:System.EventArgs"/> that contains the event data.</param>
|
|
protected override void OnMouseLeave(EventArgs e)
|
|
{
|
|
base.OnMouseLeave(e);
|
|
if (State != ComboBoxState.Pressed)
|
|
State = ComboBoxState.Normal;
|
|
}
|
|
|
|
/// <summary>Raises the <see cref="E:System.Windows.Forms.Control.MouseMove"/> event.</summary>
|
|
/// <param name="e">A <see cref="T:System.Windows.Forms.MouseEventArgs"/> that contains the event data.</param>
|
|
protected override void OnMouseMove(MouseEventArgs e)
|
|
{
|
|
base.OnMouseMove(e);
|
|
if (State != ComboBoxState.Pressed)
|
|
State = ComboBoxState.Hot;
|
|
}
|
|
|
|
/// <summary>Raises the <see cref="E:System.Windows.Forms.Control.Paint"/> event.</summary>
|
|
/// <param name="e">A <see cref="T:System.Windows.Forms.PaintEventArgs"/> that contains the event data.</param>
|
|
protected override void OnPaint(PaintEventArgs e)
|
|
{
|
|
base.OnPaint(e);
|
|
|
|
if (IsDisposed)
|
|
return;
|
|
|
|
BufferedPaint.PaintAnimation(e.Graphics, this, ClientRectangle, PaintControl, currentState, Enabled ? newState : ComboBoxState.Disabled, (a, b) => (int)vsr.GetTransitionDuration((int)a, (int)b));
|
|
}
|
|
|
|
/// <summary>Paints the background of the control.</summary>
|
|
/// <param name="pevent">A <see cref="T:System.Windows.Forms.PaintEventArgs"/> that contains information about the control to paint.</param>
|
|
protected override void OnPaintBackground(PaintEventArgs pevent)
|
|
{
|
|
// don't paint the control's background
|
|
}
|
|
|
|
/// <summary>Paints the control.</summary>
|
|
/// <param name="dc">The dc.</param>
|
|
/// <param name="bounds">The bounds.</param>
|
|
/// <param name="state">State of the current.</param>
|
|
/// <param name="data">The data.</param>
|
|
protected virtual void PaintControl(Graphics dc, Rectangle bounds, ComboBoxState state, int data)
|
|
{
|
|
var cbi = COMBOBOXINFO.FromHandle(Handle);
|
|
|
|
var itemText = SelectedIndex >= 0 ? GetItemText(SelectedItem) : string.Empty;
|
|
Rectangle tr = cbi.rcItem;
|
|
/*Rectangle tr = bounds;
|
|
tr.Width -= (SystemInformation.VerticalScrollBarWidth + 2);
|
|
tr.Inflate(0, -2);
|
|
tr.Offset(1, 0);*/
|
|
Rectangle br = cbi.rcButton;
|
|
var vsSuccess = false;
|
|
if (vsr != null)
|
|
{
|
|
/*Rectangle r = Rectangle.Inflate(bounds, 1, 1);
|
|
if (this.DropDownStyle != ComboBoxStyle.DropDownList)
|
|
{
|
|
dc.Clear(this.BackColor);
|
|
ComboBoxRenderer.DrawTextBox(dc, r, itemText, this.Font, tr, tff, state);
|
|
ComboBoxRenderer.DrawDropDownButton(dc, br, state);
|
|
}
|
|
else*/
|
|
{
|
|
try
|
|
{
|
|
vsr.DrawParentBackground(dc, bounds, this);
|
|
vsr.DrawBackground(dc, bounds);
|
|
if (DropDownStyle != ComboBoxStyle.DropDownList) br.Inflate(1, 1);
|
|
var cr = DropDownStyle == ComboBoxStyle.DropDownList ? Rectangle.Inflate(br, -1, -1) : br;
|
|
vsr.SetState((int)(br.Contains(PointToClient(Cursor.Position)) ? state : ComboBoxState.Normal));
|
|
vsr.DrawBackground(dc, br, cr);
|
|
if (Focused && State != ComboBoxState.Pressed)
|
|
{
|
|
var sz = TextRenderer.MeasureText(dc, "Wg", Font, tr.Size, TextFormatFlags.Default);
|
|
var fr = Rectangle.Inflate(tr, 0, (sz.Height - tr.Height) / 2 + 1);
|
|
ControlPaint.DrawFocusRectangle(dc, fr);
|
|
}
|
|
TextRenderer.DrawText(dc, itemText, Font, tr, ForeColor, tff);
|
|
vsSuccess = true;
|
|
}
|
|
catch { }
|
|
}
|
|
}
|
|
|
|
if (!vsSuccess)
|
|
{
|
|
System.Diagnostics.Debug.WriteLine($"CR:{bounds};Foc:{Focused};St:{state};Tx:{itemText}");
|
|
var bgc = Enabled ? BackColor : SystemColors.Control;
|
|
dc.Clear(bgc);
|
|
ControlPaint.DrawBorder3D(dc, bounds, Border3DStyle.Sunken);
|
|
ControlPaint.DrawComboButton(dc, br, Enabled ? (state == ComboBoxState.Pressed ? ButtonState.Pushed : ButtonState.Normal) : ButtonState.Inactive);
|
|
//using (var bb = new SolidBrush(this.BackColor))
|
|
// dc.FillRectangle(bb, tr);
|
|
if (Focused)
|
|
{
|
|
var sz = TextRenderer.MeasureText(dc, "Wg", Font, tr.Size, TextFormatFlags.Default);
|
|
var fr = Rectangle.Inflate(tr, 0, (sz.Height - tr.Height) / 2 + 1);
|
|
dc.FillRectangle(SystemBrushes.Highlight, fr);
|
|
ControlPaint.DrawFocusRectangle(dc, fr); //, this.ForeColor, SystemColors.Highlight);
|
|
}
|
|
TextRenderer.DrawText(dc, itemText, Font, tr, Focused ? SystemColors.HighlightText : (Enabled ? ForeColor : SystemColors.GrayText), bgc, tff);
|
|
}
|
|
}
|
|
|
|
/// <summary>Processes a command key.</summary>
|
|
/// <param name="msg">
|
|
/// A <see cref="T:System.Windows.Forms.Message"/>, passed by reference, that represents the window message to process.
|
|
/// </param>
|
|
/// <param name="keyData">One of the <see cref="T:System.Windows.Forms.Keys"/> values that represents the key to process.</param>
|
|
/// <returns>true if the character was processed by the control; otherwise, false.</returns>
|
|
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
|
|
{
|
|
var visItems = DropDownHeight / ItemHeight;
|
|
switch (keyData)
|
|
{
|
|
case Keys.Down:
|
|
case Keys.Right:
|
|
SelectedIndex = GetNextEnabledItemIndex(SelectedIndex, true);
|
|
return true;
|
|
|
|
case Keys.Up:
|
|
case Keys.Left:
|
|
SelectedIndex = GetNextEnabledItemIndex(SelectedIndex, false);
|
|
return true;
|
|
|
|
case Keys.PageDown:
|
|
if (SelectedIndex + visItems > Items.Count)
|
|
SelectedIndex = GetNextEnabledItemIndex(Items.Count, false);
|
|
else
|
|
SelectedIndex = GetNextEnabledItemIndex(SelectedIndex + visItems, true);
|
|
return true;
|
|
|
|
case Keys.PageUp:
|
|
if (SelectedIndex - visItems < 0)
|
|
SelectedIndex = GetNextEnabledItemIndex(-1, true);
|
|
else
|
|
SelectedIndex = GetNextEnabledItemIndex(SelectedIndex - visItems, false);
|
|
return true;
|
|
|
|
case Keys.Home:
|
|
SelectedIndex = GetNextEnabledItemIndex(-1, true);
|
|
return true;
|
|
|
|
case Keys.End:
|
|
SelectedIndex = GetNextEnabledItemIndex(Items.Count, false);
|
|
return true;
|
|
|
|
case Keys.Enter:
|
|
var pt = dropDownWindow?.MapPointToClient(Cursor.Position) ?? default;
|
|
var idx = dropDownWindow?.IndexFromPoint(pt.X, pt.Y) ?? default;
|
|
if (idx >= 0 && IsItemEnabled(idx))
|
|
return false;
|
|
DroppedDown = false;
|
|
return true;
|
|
|
|
case Keys.Escape:
|
|
DroppedDown = false;
|
|
return true;
|
|
}
|
|
return base.ProcessCmdKey(ref msg, keyData);
|
|
}
|
|
|
|
/// <summary>Processes Windows messages.</summary>
|
|
/// <param name="m">The Windows <see cref="T:System.Windows.Forms.Message"/> to process.</param>
|
|
protected override void WndProc(ref Message m)
|
|
{
|
|
base.WndProc(ref m);
|
|
if ((int)(long)m.WParam == 0x3e80001 && !IsDisposed)
|
|
{
|
|
dropDownWindow = new ListBoxNativeWindow(m.LParam, this);
|
|
}
|
|
}
|
|
|
|
private int FindEnabledString(string str, int startIndex)
|
|
{
|
|
if (str != null)
|
|
{
|
|
if (startIndex < -1 || startIndex >= Items.Count)
|
|
return -1;
|
|
var length = str.Length;
|
|
var num2 = 0;
|
|
for (var i = (startIndex + 1) % Items.Count; num2 < Items.Count; i = (i + 1) % Items.Count)
|
|
{
|
|
num2++;
|
|
if (IsItemEnabled(i) && string.Compare(str, 0, GetItemText(Items[i]), 0, length, true, System.Globalization.CultureInfo.CurrentUICulture) == 0)
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
private int GetNextEnabledItemIndex(int startIndex, bool forward = true)
|
|
{
|
|
if (forward)
|
|
{
|
|
for (var i = startIndex + 1; i < Items.Count; i++)
|
|
{
|
|
if (IsItemEnabled(i))
|
|
return i;
|
|
}
|
|
return startIndex;
|
|
}
|
|
else
|
|
{
|
|
for (var i = startIndex - 1; i >= 0; i--)
|
|
{
|
|
if (IsItemEnabled(i))
|
|
return i;
|
|
}
|
|
return startIndex;
|
|
}
|
|
}
|
|
|
|
private class ListBoxNativeWindow : NativeWindow
|
|
{
|
|
private readonly DisabledItemComboBox Parent;
|
|
|
|
public ListBoxNativeWindow(IntPtr handle, DisabledItemComboBox parent)
|
|
{
|
|
Parent = parent;
|
|
AssignHandle(handle);
|
|
}
|
|
|
|
public int IndexFromPoint(int x, int y)
|
|
{
|
|
var n = SendMessage(Handle, 0x1a9u /* LB_ITEMFROMPOINT */, IntPtr.Zero, MAKELPARAM((ushort)x, (ushort)y));
|
|
if (HIWORD(n) == 0)
|
|
return LOWORD(n);
|
|
return -1;
|
|
}
|
|
|
|
protected override void WndProc(ref Message m)
|
|
{
|
|
if (!Parent.IsDisposed && m.Msg == 0x0202 || m.Msg == 0x0201 || m.Msg == 0x0203) /* WM_LBUTTONUP or WM_LBUTTONDOWN or WM_LBUTTONDBLCLK */
|
|
{
|
|
var idx = IndexFromPoint(SignedLOWORD(m.LParam), SignedHIWORD(m.LParam));
|
|
if (idx >= 0 && !Parent.IsItemEnabled(idx))
|
|
return;
|
|
}
|
|
base.WndProc(ref m);
|
|
}
|
|
}
|
|
}
|
|
} |