diff options
Diffstat (limited to 'mcs/class/Managed.Windows.Forms/System.Windows.Forms/Label.cs')
| -rw-r--r-- | mcs/class/Managed.Windows.Forms/System.Windows.Forms/Label.cs | 657 |
1 files changed, 657 insertions, 0 deletions
diff --git a/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Label.cs b/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Label.cs new file mode 100644 index 00000000000..d82870b312c --- /dev/null +++ b/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Label.cs @@ -0,0 +1,657 @@ +// Permission is hereby granted, free of charge, to any person obtaining +// a copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to +// permit persons to whom the Software is furnished to do so, subject to +// the following conditions: +// +// The above copyright notice and this permission notice shall be +// included in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +// +// Copyright (c) 2004-2006 Novell, Inc. +// +// Authors: +// Jordi Mas i Hernandez, jordi@ximian.com +// Peter Bartok, pbartok@novell.com +// +// + +// COMPLETE + +using System.ComponentModel; +using System.ComponentModel.Design; +using System.Drawing; +using System.Drawing.Text; +using System.Drawing.Imaging; +using System.Runtime.InteropServices; + +namespace System.Windows.Forms +{ + [DefaultProperty("Text")] + [Designer ("System.Windows.Forms.Design.LabelDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")] + public class Label : Control + { + private bool autosize; + private Image image; + private bool render_transparent; + private FlatStyle flat_style; + private int preferred_height; + private int preferred_width; + private bool use_mnemonic; + private int image_index = -1; + private ImageList image_list; + internal ContentAlignment image_align; + internal StringFormat string_format; + internal ContentAlignment text_align; + static SizeF req_witdthsize = new SizeF (0,0); + + #region Events + public event EventHandler AutoSizeChanged; + + [Browsable(false)] + [EditorBrowsable(EditorBrowsableState.Never)] + public new event EventHandler BackgroundImageChanged { + add { + base.BackgroundImageChanged += value; + } + remove { + base.BackgroundImageChanged -= value; + } + } + + [Browsable(false)] + [EditorBrowsable(EditorBrowsableState.Never)] + public new event EventHandler ImeModeChanged { + add { + base.ImeModeChanged += value; + } + remove { + base.ImeModeChanged -= value; + } + } + + [Browsable(false)] + [EditorBrowsable(EditorBrowsableState.Never)] + public new event KeyEventHandler KeyDown { + add { + base.KeyDown += value; + } + remove { + base.KeyDown -= value; + } + } + + + [Browsable(false)] + [EditorBrowsable(EditorBrowsableState.Never)] + public new event KeyPressEventHandler KeyPress { + add { + base.KeyPress += value; + } + remove { + base.KeyPress -= value; + } + } + + + [Browsable(false)] + [EditorBrowsable(EditorBrowsableState.Never)] + public new event KeyEventHandler KeyUp { + add { + base.KeyUp += value; + } + remove { + base.KeyUp -= value; + } + } + + + [Browsable(false)] + [EditorBrowsable(EditorBrowsableState.Never)] + public new event EventHandler TabStopChanged { + add { + base.TabStopChanged += value; + } + remove { + base.TabStopChanged -= value; + } + } + + public event EventHandler TextAlignChanged; + #endregion + + public Label () + { + // Defaults in the Spec + autosize = false; + tab_stop = false; + string_format = new StringFormat(); + TextAlign = ContentAlignment.TopLeft; + image = null; + UseMnemonic = true; + image_list = null; + image_align = ContentAlignment.MiddleCenter; + SetUseMnemonic (UseMnemonic); + flat_style = FlatStyle.Standard; + + CalcPreferredHeight (); + CalcPreferredWidth (); + + AutoSizeChanged = null; + TextAlignChanged = null; + + SetStyle (ControlStyles.Selectable, false); + SetStyle (ControlStyles.ResizeRedraw | + ControlStyles.UserPaint | + ControlStyles.AllPaintingInWmPaint | + ControlStyles.SupportsTransparentBackColor | + ControlStyles.DoubleBuffer, true); + + HandleCreated += new EventHandler (OnHandleCreatedLB); + } + + #region Public Properties + [DefaultValue(false)] + [Localizable(true)] + [RefreshProperties(RefreshProperties.All)] + public virtual bool AutoSize { + get { return autosize; } + set { + if (autosize == value) + return; + + autosize = value; + CalcAutoSize (); + Refresh (); + + OnAutoSizeChanged (EventArgs.Empty); + } + } + + [Browsable(false)] + [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)] + [EditorBrowsable(EditorBrowsableState.Never)] + public override Image BackgroundImage { + get { + return base.BackgroundImage; + } + set { + base.BackgroundImage = value; + Refresh (); + } + } + + [DefaultValue(BorderStyle.None)] + [DispId(-504)] + public virtual BorderStyle BorderStyle { + get { return InternalBorderStyle; } + set { InternalBorderStyle = value; } + } + + protected override CreateParams CreateParams { + get { return base.CreateParams;} + } + + protected override ImeMode DefaultImeMode { + get { return ImeMode.Disable;} + } + + protected override Size DefaultSize { + get {return ThemeEngine.Current.LabelDefaultSize;} + } + + [DefaultValue(FlatStyle.Standard)] + public FlatStyle FlatStyle { + get { + return flat_style; + } + set { + if (!Enum.IsDefined (typeof (FlatStyle), value)) + throw new InvalidEnumArgumentException (string.Format("Enum argument value '{0}' is not valid for FlatStyle", value)); + + if (flat_style == value) + return; + + flat_style = value; + Refresh (); + } + } + + [Localizable(true)] + public Image Image { + get { + if (image != null) { + return image; + } + + if (image_list != null && ImageIndex >= 0) { + return image_list.Images[ImageIndex]; + } + + return null; + } + set { + if (image == value) + return; + + image = value; + Refresh (); + } + } + + [DefaultValue(ContentAlignment.MiddleCenter)] + [Localizable(true)] + public ContentAlignment ImageAlign { + get { + return image_align; + } + set { + if (!Enum.IsDefined (typeof (ContentAlignment), value)) + throw new InvalidEnumArgumentException (string.Format("Enum argument value '{0}' is not valid for ContentAlignment", value)); + + if (image_align == value) + return; + + image_align = value; + Refresh (); + } + } + + [DefaultValue (-1)] + [Editor ("System.Windows.Forms.Design.ImageIndexEditor, " + Consts.AssemblySystem_Design, typeof (System.Drawing.Design.UITypeEditor))] + [Localizable (true)] + [TypeConverter (typeof (ImageIndexConverter))] + public int ImageIndex { + get { + if (ImageList == null) { + return -1; + } + + if (image_index >= image_list.Images.Count) { + return image_list.Images.Count - 1; + } + + return image_index; + } + set { + + if (value < -1) + throw new ArgumentException (); + + if (image_index == value) + return; + + image_index = value; + + if (ImageList != null && image_index !=-1) + Image = null; + + Refresh (); + } + } + + [DefaultValue(null)] + public ImageList ImageList { + get { return image_list;} + set { + if (image_list == value) + return; + + image_list = value; + + if (image_list != null && image_index !=-1) + Image = null; + + Refresh (); + } + } + + [Browsable(false)] + [EditorBrowsable(EditorBrowsableState.Never)] + public new ImeMode ImeMode { + get { return base.ImeMode; } + set { base.ImeMode = value; } + } + + [Browsable(false)] + [DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Hidden)] + [EditorBrowsable(EditorBrowsableState.Advanced)] + public virtual int PreferredHeight { + get { return preferred_height; } + } + + [Browsable(false)] + [DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Hidden)] + [EditorBrowsable(EditorBrowsableState.Advanced)] + public virtual int PreferredWidth { + get {return preferred_width; } + } + + protected virtual bool RenderTransparent { + get { return render_transparent; } + set { render_transparent = value;} + } + + [Browsable(false)] + [DefaultValue(false)] + [EditorBrowsable(EditorBrowsableState.Never)] + public new bool TabStop { + get { return base.TabStop; } + set { base.TabStop = value; } + } + + [DefaultValue(ContentAlignment.TopLeft)] + [Localizable(true)] + public virtual ContentAlignment TextAlign { + get { return text_align; } + + set { + if (!Enum.IsDefined (typeof (ContentAlignment), value)) + throw new InvalidEnumArgumentException (string.Format("Enum argument value '{0}' is not valid for ContentAlignment", value)); + + if (text_align != value) { + + text_align = value; + + switch (value) { + + case ContentAlignment.BottomLeft: + string_format.LineAlignment = StringAlignment.Far; + string_format.Alignment = StringAlignment.Near; + break; + case ContentAlignment.BottomCenter: + string_format.LineAlignment = StringAlignment.Far; + string_format.Alignment = StringAlignment.Center; + break; + case ContentAlignment.BottomRight: + string_format.LineAlignment = StringAlignment.Far; + string_format.Alignment = StringAlignment.Far; + break; + case ContentAlignment.TopLeft: + string_format.LineAlignment = StringAlignment.Near; + string_format.Alignment = StringAlignment.Near; + break; + case ContentAlignment.TopCenter: + string_format.LineAlignment = StringAlignment.Near; + string_format.Alignment = StringAlignment.Center; + break; + case ContentAlignment.TopRight: + string_format.LineAlignment = StringAlignment.Near; + string_format.Alignment = StringAlignment.Far; + break; + case ContentAlignment.MiddleLeft: + string_format.LineAlignment = StringAlignment.Center; + string_format.Alignment = StringAlignment.Near; + break; + case ContentAlignment.MiddleRight: + string_format.LineAlignment = StringAlignment.Center; + string_format.Alignment = StringAlignment.Far; + break; + case ContentAlignment.MiddleCenter: + string_format.LineAlignment = StringAlignment.Center; + string_format.Alignment = StringAlignment.Center; + break; + default: + break; + } + + OnTextAlignChanged (EventArgs.Empty); + Refresh(); + } + } + } + + [DefaultValue(true)] + public bool UseMnemonic { + get { return use_mnemonic; } + set { + if (use_mnemonic != value) { + use_mnemonic = value; + SetUseMnemonic (use_mnemonic); + Refresh (); + } + } + } + + #endregion + + + #region Public Methods + + protected Rectangle CalcImageRenderBounds (Image image, Rectangle area, ContentAlignment img_align) + { + Rectangle rcImageClip = area; + rcImageClip.Inflate (-2,-2); + + int X = area.X; + int Y = area.Y; + + if (img_align == ContentAlignment.TopCenter || + img_align == ContentAlignment.MiddleCenter || + img_align == ContentAlignment.BottomCenter) { + X += (area.Width - image.Width) / 2; + } + else if (img_align == ContentAlignment.TopRight || + img_align == ContentAlignment.MiddleRight|| + img_align == ContentAlignment.BottomRight) { + X += (area.Width - image.Width); + } + + if( img_align == ContentAlignment.BottomCenter || + img_align == ContentAlignment.BottomLeft || + img_align == ContentAlignment.BottomRight) { + Y += area.Height - image.Height; + } + else if(img_align == ContentAlignment.MiddleCenter || + img_align == ContentAlignment.MiddleLeft || + img_align == ContentAlignment.MiddleRight) { + Y += (area.Height - image.Height) / 2; + } + + rcImageClip.X = X; + rcImageClip.Y = Y; + rcImageClip.Width = image.Width; + rcImageClip.Height = image.Height; + + return rcImageClip; + } + + + protected override AccessibleObject CreateAccessibilityInstance () + { + return base.CreateAccessibilityInstance (); + } + + protected override void Dispose(bool disposing) + { + base.Dispose (disposing); + + if (disposing) + string_format.Dispose (); + } + + protected void DrawImage (Graphics g, Image image, Rectangle area, ContentAlignment img_align) + { + if (image == null || g == null) + return; + + Rectangle rcImageClip = CalcImageRenderBounds (image, area, img_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 virtual void OnAutoSizeChanged (EventArgs e) + { + if (AutoSizeChanged != null) + AutoSizeChanged (this, e); + } + + protected override void OnEnabledChanged (EventArgs e) + { + base.OnEnabledChanged (e); + } + + protected override void OnFontChanged (EventArgs e) + { + base.OnFontChanged (e); + if (autosize) { + CalcAutoSize(); + } else { + CalcPreferredHeight (); + } + Refresh (); + } + + protected override void OnPaint (PaintEventArgs pevent) + { + ThemeEngine.Current.DrawLabel (pevent.Graphics, ClientRectangle, this); + DrawImage (pevent.Graphics, Image, ClientRectangle, image_align); + base.OnPaint(pevent); + } + + protected override void OnParentChanged (EventArgs e) + { + base.OnParentChanged (e); + } + + protected virtual void OnTextAlignChanged (EventArgs e) + { + if (TextAlignChanged != null) + TextAlignChanged (this, e); + } + + protected override void OnTextChanged (EventArgs e) + { + base.OnTextChanged (e); + if (autosize) { + CalcAutoSize (); + } else { + CalcPreferredWidth (); + } + Refresh (); + } + + protected override void OnVisibleChanged (EventArgs e) + { + base.OnVisibleChanged (e); + } + + protected override bool ProcessMnemonic (char charCode) + { + if (IsMnemonic(charCode, Text) == true) { + // 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 (IsHandleCreated == false || AutoSize == false) + return; + + CalcPreferredWidth (); + CalcPreferredHeight (); + + Width = PreferredWidth; + Height = PreferredHeight; + } + + private void CalcPreferredHeight () + { + preferred_height = Font.Height; + + switch (border_style) { + case BorderStyle.None: + preferred_height += 3; + break; + case BorderStyle.FixedSingle: + case BorderStyle.Fixed3D: + preferred_height += 6; + break; + default: + break; + } + + } + + private void CalcPreferredWidth () + { + SizeF size; + size = DeviceContext.MeasureString (Text, Font, req_witdthsize, string_format); + preferred_width = (int) size.Width + 3; + } + + 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 +#if NET_2_0 + + public bool UseCompatibleTextRendering { + get { + return use_compatible_text_rendering; + } + + set { + use_compatible_text_rendering = value; + } + } +#endif + + } +} |