728 lines
19 KiB
C#
728 lines
19 KiB
C#
// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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// Copyright (c) 2004-2006 Novell, Inc.
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//
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// Authors:
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// Jordi Mas i Hernandez, jordi@ximian.com
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// Peter Bartok, pbartok@novell.com
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//
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//
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// COMPLETE
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using System.ComponentModel;
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using System.ComponentModel.Design;
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using System.Drawing;
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using System.Drawing.Text;
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using System.Drawing.Imaging;
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using System.Runtime.InteropServices;
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using System.Windows.Forms.Theming;
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namespace System.Windows.Forms
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{
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[DefaultProperty ("Text")]
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[Designer ("System.Windows.Forms.Design.LabelDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
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[ClassInterface (ClassInterfaceType.AutoDispatch)]
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[ComVisible (true)]
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[ToolboxItem ("System.Windows.Forms.Design.AutoSizeToolboxItem," + Consts.AssemblySystem_Design)]
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[DefaultBindingProperty ("Text")]
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public class Label : Control
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{
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private bool autosize;
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private bool auto_ellipsis;
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private Image image;
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private bool render_transparent;
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private FlatStyle flat_style;
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private bool use_mnemonic;
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private int image_index = -1;
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private string image_key = string.Empty;
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private ImageList image_list;
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internal ContentAlignment image_align;
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internal StringFormat string_format;
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internal ContentAlignment text_align;
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static SizeF req_witdthsize = new SizeF (0,0);
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#region Events
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static object AutoSizeChangedEvent = new object ();
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static object TextAlignChangedEvent = new object ();
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[Browsable (true)]
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[EditorBrowsable (EditorBrowsableState.Always)]
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public new event EventHandler AutoSizeChanged {
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add { Events.AddHandler (AutoSizeChangedEvent, value); }
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remove { Events.RemoveHandler (AutoSizeChangedEvent, value); }
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}
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[Browsable(false)]
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[EditorBrowsable(EditorBrowsableState.Never)]
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public new event EventHandler BackgroundImageChanged {
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add { base.BackgroundImageChanged += value; }
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remove { base.BackgroundImageChanged -= value; }
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}
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[Browsable (false)]
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[EditorBrowsable (EditorBrowsableState.Never)]
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public new event EventHandler BackgroundImageLayoutChanged {
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add { base.BackgroundImageLayoutChanged += value; }
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remove { base.BackgroundImageLayoutChanged -= value; }
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}
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[Browsable(false)]
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[EditorBrowsable(EditorBrowsableState.Never)]
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public new event EventHandler ImeModeChanged {
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add { base.ImeModeChanged += value; }
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remove { base.ImeModeChanged -= value; }
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}
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[Browsable(false)]
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[EditorBrowsable(EditorBrowsableState.Never)]
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public new event KeyEventHandler KeyDown {
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add { base.KeyDown += value; }
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remove { base.KeyDown -= value; }
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}
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[Browsable(false)]
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[EditorBrowsable(EditorBrowsableState.Never)]
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public new event KeyPressEventHandler KeyPress {
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add { base.KeyPress += value; }
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remove { base.KeyPress -= value; }
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}
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[Browsable(false)]
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[EditorBrowsable(EditorBrowsableState.Never)]
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public new event KeyEventHandler KeyUp {
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add { base.KeyUp += value; }
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remove { base.KeyUp -= value; }
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}
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[Browsable(false)]
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[EditorBrowsable(EditorBrowsableState.Never)]
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public new event EventHandler TabStopChanged {
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add { base.TabStopChanged += value; }
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remove { base.TabStopChanged -= value; }
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}
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public event EventHandler TextAlignChanged {
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add { Events.AddHandler (TextAlignChangedEvent, value); }
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remove { Events.RemoveHandler (TextAlignChangedEvent, value); }
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}
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#endregion
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public Label ()
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{
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// Defaults in the Spec
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autosize = false;
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TabStop = false;
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string_format = new StringFormat();
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string_format.FormatFlags = StringFormatFlags.LineLimit;
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TextAlign = ContentAlignment.TopLeft;
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image = null;
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UseMnemonic = true;
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image_list = null;
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image_align = ContentAlignment.MiddleCenter;
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SetUseMnemonic (UseMnemonic);
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flat_style = FlatStyle.Standard;
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SetStyle (ControlStyles.Selectable, false);
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SetStyle (ControlStyles.ResizeRedraw |
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ControlStyles.UserPaint |
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ControlStyles.AllPaintingInWmPaint |
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ControlStyles.SupportsTransparentBackColor |
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ControlStyles.OptimizedDoubleBuffer
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, true);
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HandleCreated += new EventHandler (OnHandleCreatedLB);
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}
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#region Public Properties
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[DefaultValue (false)]
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[Browsable (true)]
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[EditorBrowsable (EditorBrowsableState.Always)]
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public bool AutoEllipsis {
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get { return this.auto_ellipsis; }
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set
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{
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if (this.auto_ellipsis != value) {
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this.auto_ellipsis = value;
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if (this.auto_ellipsis)
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string_format.Trimming = StringTrimming.EllipsisCharacter;
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else
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string_format.Trimming = StringTrimming.Character;
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if (Parent != null)
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Parent.PerformLayout (this, "AutoEllipsis");
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this.Invalidate ();
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}
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}
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}
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[Browsable (true)]
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[DesignerSerializationVisibility (DesignerSerializationVisibility.Visible)]
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[EditorBrowsable (EditorBrowsableState.Always)]
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[DefaultValue(false)]
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[Localizable(true)]
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[RefreshProperties(RefreshProperties.All)]
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public override bool AutoSize {
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get { return autosize; }
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set {
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if (autosize == value)
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return;
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base.SetAutoSizeMode (AutoSizeMode.GrowAndShrink);
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base.AutoSize = value;
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autosize = value;
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CalcAutoSize ();
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Invalidate ();
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OnAutoSizeChanged (EventArgs.Empty);
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}
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}
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[Browsable(false)]
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[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
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[EditorBrowsable(EditorBrowsableState.Never)]
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public override Image BackgroundImage {
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get { return base.BackgroundImage; }
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set {
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base.BackgroundImage = value;
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Invalidate ();
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}
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}
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[Browsable (false)]
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[EditorBrowsable (EditorBrowsableState.Never)]
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public override ImageLayout BackgroundImageLayout {
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get { return base.BackgroundImageLayout; }
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set { base.BackgroundImageLayout = value; }
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}
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[DefaultValue(BorderStyle.None)]
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[DispId(-504)]
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public virtual BorderStyle BorderStyle {
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get { return InternalBorderStyle; }
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set { InternalBorderStyle = value; }
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}
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protected override CreateParams CreateParams {
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get {
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CreateParams create_params = base.CreateParams;
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if (BorderStyle != BorderStyle.Fixed3D)
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return create_params;
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create_params.ExStyle &= ~(int) WindowExStyles.WS_EX_CLIENTEDGE;
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create_params.ExStyle |= (int)WindowExStyles.WS_EX_STATICEDGE;
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return create_params;
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}
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}
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protected override ImeMode DefaultImeMode {
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get { return ImeMode.Disable;}
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}
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protected override Padding DefaultMargin {
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get { return new Padding (3, 0, 3, 0); }
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}
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protected override Size DefaultSize {
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get { return ThemeElements.LabelPainter.DefaultSize; }
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}
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[DefaultValue(FlatStyle.Standard)]
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public FlatStyle FlatStyle {
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get { return flat_style; }
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set {
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if (!Enum.IsDefined (typeof (FlatStyle), value))
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throw new InvalidEnumArgumentException (string.Format("Enum argument value '{0}' is not valid for FlatStyle", value));
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if (flat_style == value)
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return;
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flat_style = value;
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if (Parent != null)
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Parent.PerformLayout (this, "FlatStyle");
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Invalidate ();
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}
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}
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[Localizable(true)]
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public Image Image {
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get {
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if (this.image != null)
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return this.image;
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if (this.image_index >= 0)
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if (this.image_list != null)
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return this.image_list.Images[this.image_index];
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if (!string.IsNullOrEmpty (this.image_key))
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if (this.image_list != null)
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return this.image_list.Images[this.image_key];
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return null;
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}
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set {
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if (this.image != value) {
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this.image = value;
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this.image_index = -1;
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this.image_key = string.Empty;
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this.image_list = null;
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if (this.AutoSize && this.Parent != null)
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this.Parent.PerformLayout (this, "Image");
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Invalidate ();
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}
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}
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}
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[DefaultValue(ContentAlignment.MiddleCenter)]
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[Localizable(true)]
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public ContentAlignment ImageAlign {
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get { return image_align; }
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set {
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if (!Enum.IsDefined (typeof (ContentAlignment), value))
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throw new InvalidEnumArgumentException (string.Format("Enum argument value '{0}' is not valid for ContentAlignment", value));
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if (image_align == value)
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return;
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image_align = value;
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Invalidate ();
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}
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}
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[DefaultValue (-1)]
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[Editor ("System.Windows.Forms.Design.ImageIndexEditor, " + Consts.AssemblySystem_Design, typeof (System.Drawing.Design.UITypeEditor))]
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[Localizable (true)]
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[TypeConverter (typeof (ImageIndexConverter))]
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[RefreshProperties (RefreshProperties.Repaint)]
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public int ImageIndex {
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get {
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if (ImageList == null) {
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return -1;
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}
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if (image_index >= image_list.Images.Count) {
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return image_list.Images.Count - 1;
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}
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return image_index;
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}
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set {
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if (value < -1)
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throw new ArgumentException ();
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if (this.image_index != value) {
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this.image_index = value;
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this.image = null;
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this.image_key = string.Empty;
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Invalidate ();
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}
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}
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}
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[Localizable (true)]
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[DefaultValue ("")]
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[Editor ("System.Windows.Forms.Design.ImageIndexEditor, " + Consts.AssemblySystem_Design, typeof (System.Drawing.Design.UITypeEditor))]
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[RefreshProperties (RefreshProperties.Repaint)]
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[TypeConverter (typeof (ImageKeyConverter))]
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public string ImageKey {
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get { return this.image_key; }
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set {
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if (this.image_key != value) {
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this.image = null;
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this.image_index = -1;
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this.image_key = value;
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this.Invalidate ();
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}
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}
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}
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[DefaultValue(null)]
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[RefreshProperties (RefreshProperties.Repaint)]
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public ImageList ImageList {
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get { return image_list;}
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set {
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if (image_list == value)
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return;
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image_list = value;
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if (image_list != null && image_index !=-1)
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Image = null;
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Invalidate ();
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}
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}
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[Browsable(false)]
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[EditorBrowsable(EditorBrowsableState.Never)]
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public new ImeMode ImeMode {
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get { return base.ImeMode; }
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set { base.ImeMode = value; }
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}
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internal virtual Size InternalGetPreferredSize (Size proposed)
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{
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Size size;
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if (Text == string.Empty) {
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size = new Size (0, Font.Height);
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} else {
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size = Size.Ceiling (TextRenderer.MeasureString (Text, Font, req_witdthsize, string_format));
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size.Width += 3;
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}
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size.Width += Padding.Horizontal;
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size.Height += Padding.Vertical;
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if (!use_compatible_text_rendering)
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return size;
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if (border_style == BorderStyle.None)
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size.Height += 3;
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else
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size.Height += 6;
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return size;
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}
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public override Size GetPreferredSize (Size proposedSize)
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{
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return InternalGetPreferredSize (proposedSize);
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}
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[Browsable(false)]
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[DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Hidden)]
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[EditorBrowsable(EditorBrowsableState.Advanced)]
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public virtual int PreferredHeight {
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get { return InternalGetPreferredSize (Size.Empty).Height; }
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}
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[Browsable(false)]
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[DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Hidden)]
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[EditorBrowsable(EditorBrowsableState.Advanced)]
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public virtual int PreferredWidth {
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get { return InternalGetPreferredSize (Size.Empty).Width; }
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}
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[Obsolete ("This property has been deprecated. Use BackColor instead.")]
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protected virtual bool RenderTransparent {
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get { return render_transparent; }
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set { render_transparent = value;}
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}
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[Browsable(false)]
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[DefaultValue(false)]
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[EditorBrowsable(EditorBrowsableState.Never)]
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public new bool TabStop {
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get { return base.TabStop; }
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set { base.TabStop = value; }
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}
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[DefaultValue(ContentAlignment.TopLeft)]
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[Localizable(true)]
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public virtual ContentAlignment TextAlign {
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get { return text_align; }
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set {
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if (!Enum.IsDefined (typeof (ContentAlignment), value))
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throw new InvalidEnumArgumentException (string.Format("Enum argument value '{0}' is not valid for ContentAlignment", value));
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if (text_align != value) {
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text_align = value;
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switch (value) {
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case ContentAlignment.BottomLeft:
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string_format.LineAlignment = StringAlignment.Far;
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string_format.Alignment = StringAlignment.Near;
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break;
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case ContentAlignment.BottomCenter:
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string_format.LineAlignment = StringAlignment.Far;
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string_format.Alignment = StringAlignment.Center;
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break;
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case ContentAlignment.BottomRight:
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string_format.LineAlignment = StringAlignment.Far;
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string_format.Alignment = StringAlignment.Far;
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break;
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case ContentAlignment.TopLeft:
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string_format.LineAlignment = StringAlignment.Near;
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string_format.Alignment = StringAlignment.Near;
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break;
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case ContentAlignment.TopCenter:
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string_format.LineAlignment = StringAlignment.Near;
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string_format.Alignment = StringAlignment.Center;
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break;
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case ContentAlignment.TopRight:
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string_format.LineAlignment = StringAlignment.Near;
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string_format.Alignment = StringAlignment.Far;
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break;
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case ContentAlignment.MiddleLeft:
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string_format.LineAlignment = StringAlignment.Center;
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string_format.Alignment = StringAlignment.Near;
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break;
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case ContentAlignment.MiddleRight:
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string_format.LineAlignment = StringAlignment.Center;
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string_format.Alignment = StringAlignment.Far;
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break;
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case ContentAlignment.MiddleCenter:
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string_format.LineAlignment = StringAlignment.Center;
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string_format.Alignment = StringAlignment.Center;
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break;
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default:
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break;
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}
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OnTextAlignChanged (EventArgs.Empty);
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Invalidate ();
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}
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}
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}
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[DefaultValue(true)]
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public bool UseMnemonic {
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get { return use_mnemonic; }
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set {
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if (use_mnemonic != value) {
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use_mnemonic = value;
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SetUseMnemonic (use_mnemonic);
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Invalidate ();
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}
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}
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}
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#endregion
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#region Public Methods
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protected Rectangle CalcImageRenderBounds (Image image, Rectangle r, ContentAlignment align)
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{
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Rectangle rcImageClip = r;
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rcImageClip.Inflate (-2,-2);
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int X = r.X;
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int Y = r.Y;
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if (align == ContentAlignment.TopCenter ||
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align == ContentAlignment.MiddleCenter ||
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align == ContentAlignment.BottomCenter) {
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X += (r.Width - image.Width) / 2;
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} else if (align == ContentAlignment.TopRight ||
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align == ContentAlignment.MiddleRight||
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align == ContentAlignment.BottomRight) {
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X += (r.Width - image.Width);
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}
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if( align == ContentAlignment.BottomCenter ||
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align == ContentAlignment.BottomLeft ||
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align == ContentAlignment.BottomRight) {
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Y += r.Height - image.Height;
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} else if(align == ContentAlignment.MiddleCenter ||
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align == ContentAlignment.MiddleLeft ||
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align == ContentAlignment.MiddleRight) {
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Y += (r.Height - image.Height) / 2;
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}
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rcImageClip.X = X;
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rcImageClip.Y = Y;
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rcImageClip.Width = image.Width;
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rcImageClip.Height = image.Height;
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return rcImageClip;
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}
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protected override AccessibleObject CreateAccessibilityInstance ()
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{
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return base.CreateAccessibilityInstance ();
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}
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protected override void Dispose(bool disposing)
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{
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base.Dispose (disposing);
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if (disposing)
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string_format.Dispose ();
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}
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protected internal void DrawImage (Graphics g, Image image, Rectangle r, ContentAlignment align)
|
|
{
|
|
if (image == null || g == null)
|
|
return;
|
|
|
|
Rectangle rcImageClip = CalcImageRenderBounds (image, r, align);
|
|
|
|
if (Enabled)
|
|
g.DrawImage (image, rcImageClip.X, rcImageClip.Y, rcImageClip.Width, rcImageClip.Height);
|
|
else
|
|
ControlPaint.DrawImageDisabled (g, image, rcImageClip.X, rcImageClip.Y, BackColor);
|
|
}
|
|
|
|
protected override void OnEnabledChanged (EventArgs e)
|
|
{
|
|
base.OnEnabledChanged (e);
|
|
}
|
|
|
|
protected override void OnFontChanged (EventArgs e)
|
|
{
|
|
base.OnFontChanged (e);
|
|
if (autosize)
|
|
CalcAutoSize();
|
|
Invalidate ();
|
|
}
|
|
|
|
protected override void OnPaddingChanged (EventArgs e)
|
|
{
|
|
base.OnPaddingChanged (e);
|
|
}
|
|
|
|
protected override void OnPaint (PaintEventArgs e)
|
|
{
|
|
ThemeElements.LabelPainter.Draw (e.Graphics, ClientRectangle, this);
|
|
base.OnPaint(e);
|
|
}
|
|
|
|
protected override void OnParentChanged (EventArgs e)
|
|
{
|
|
base.OnParentChanged (e);
|
|
}
|
|
|
|
protected override void OnRightToLeftChanged (EventArgs e)
|
|
{
|
|
base.OnRightToLeftChanged (e);
|
|
}
|
|
|
|
protected virtual void OnTextAlignChanged (EventArgs e)
|
|
{
|
|
EventHandler eh = (EventHandler)(Events [TextAlignChangedEvent]);
|
|
if (eh != null)
|
|
eh (this, e);
|
|
}
|
|
|
|
protected override void OnTextChanged (EventArgs e)
|
|
{
|
|
base.OnTextChanged (e);
|
|
if (autosize)
|
|
CalcAutoSize ();
|
|
Invalidate ();
|
|
}
|
|
|
|
protected override void OnVisibleChanged (EventArgs e)
|
|
{
|
|
base.OnVisibleChanged (e);
|
|
}
|
|
|
|
protected override bool ProcessMnemonic (char charCode)
|
|
{
|
|
if (IsMnemonic (charCode, Text)) {
|
|
// Select item next in line in tab order
|
|
if (this.Parent != null)
|
|
Parent.SelectNextControl(this, true, false, false, false);
|
|
return true;
|
|
}
|
|
|
|
return base.ProcessMnemonic (charCode);
|
|
}
|
|
|
|
protected override void SetBoundsCore (int x, int y, int width, int height, BoundsSpecified specified)
|
|
{
|
|
base.SetBoundsCore (x, y, width, height, specified);
|
|
}
|
|
|
|
public override string ToString()
|
|
{
|
|
return base.ToString () + ", Text: " + Text;
|
|
}
|
|
|
|
protected override void WndProc (ref Message m)
|
|
{
|
|
switch ((Msg) m.Msg) {
|
|
case Msg.WM_DRAWITEM:
|
|
m.Result = (IntPtr)1;
|
|
break;
|
|
default:
|
|
base.WndProc (ref m);
|
|
break;
|
|
}
|
|
}
|
|
|
|
#endregion Public Methods
|
|
|
|
#region Private Methods
|
|
|
|
private void CalcAutoSize ()
|
|
{
|
|
if (!AutoSize)
|
|
return;
|
|
|
|
Size s = InternalGetPreferredSize (Size.Empty);
|
|
|
|
SetBounds (Left, Top, s.Width, s.Height, BoundsSpecified.Size);
|
|
}
|
|
|
|
private void OnHandleCreatedLB (Object o, EventArgs e)
|
|
{
|
|
if (autosize)
|
|
CalcAutoSize ();
|
|
}
|
|
|
|
private void SetUseMnemonic (bool use)
|
|
{
|
|
if (use)
|
|
string_format.HotkeyPrefix = HotkeyPrefix.Show;
|
|
else
|
|
string_format.HotkeyPrefix = HotkeyPrefix.None;
|
|
}
|
|
|
|
#endregion Private Methods
|
|
[DefaultValue (false)]
|
|
public bool UseCompatibleTextRendering {
|
|
get { return use_compatible_text_rendering; }
|
|
set { use_compatible_text_rendering = value; }
|
|
}
|
|
|
|
[SettingsBindable (true)]
|
|
[Editor ("System.ComponentModel.Design.MultilineStringEditor, " + Consts.AssemblySystem_Design,
|
|
typeof (System.Drawing.Design.UITypeEditor))]
|
|
public override string Text {
|
|
get { return base.Text; }
|
|
set { base.Text = value; }
|
|
}
|
|
|
|
protected override void OnMouseEnter (EventArgs e)
|
|
{
|
|
base.OnMouseEnter (e);
|
|
}
|
|
|
|
protected override void OnMouseLeave (EventArgs e)
|
|
{
|
|
base.OnMouseLeave (e);
|
|
}
|
|
|
|
protected override void OnHandleDestroyed (EventArgs e)
|
|
{
|
|
base.OnHandleDestroyed (e);
|
|
}
|
|
}
|
|
}
|