Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / ButtonInternal / CheckableControlBaseAdapter.cs / 1305376 / CheckableControlBaseAdapter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms.ButtonInternal { using System; using System.Diagnostics; using System.Drawing; using System.Drawing.Drawing2D; using System.Drawing.Imaging; using System.Drawing.Text; using System.Windows.Forms; ////// Common class for RadioButtonBaseAdapter and CheckBoxBaseAdapter /// internal abstract class CheckableControlBaseAdapter : ButtonBaseAdapter { private const int standardCheckSize = 13; private ButtonBaseAdapter buttonAdapter; internal CheckableControlBaseAdapter(ButtonBase control) : base(control) {} protected ButtonBaseAdapter ButtonAdapter { get { if (buttonAdapter == null) { buttonAdapter = CreateButtonAdapter(); } return buttonAdapter; } } internal override Size GetPreferredSizeCore(Size proposedSize) { if (Appearance == Appearance.Button) { return ButtonAdapter.GetPreferredSizeCore(proposedSize); } using (Graphics measurementGraphics = WindowsFormsUtils.CreateMeasurementGraphics()) { using (PaintEventArgs pe = new PaintEventArgs(measurementGraphics, new Rectangle())) { LayoutOptions options = Layout(pe); return options.GetPreferredSizeCore(proposedSize); } } } protected abstract ButtonBaseAdapter CreateButtonAdapter(); private Appearance Appearance { get { CheckBox checkBox = Control as CheckBox; if(checkBox != null) { return checkBox.Appearance; } RadioButton radioButton = Control as RadioButton; if(radioButton != null) { return radioButton.Appearance; } Debug.Fail("Unexpected control type '" + Control.GetType().FullName + "'"); return Appearance.Normal; } } internal override LayoutOptions CommonLayout() { LayoutOptions layout = base.CommonLayout(); layout.growBorderBy1PxWhenDefault = false; layout.borderSize = 0; layout.paddingSize = 0; layout.maxFocus = false; layout.focusOddEvenFixup = true; layout.checkSize = standardCheckSize; return layout; } internal static float GetDpiScaleRatio(Graphics g) { if (g == null) return 1.0F; return g.DpiX / 96; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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