//------------------------------------------------------------------------------
// <copyright file="ButtonBase.cs" company="Microsoft">
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>                                                                
//------------------------------------------------------------------------------
 
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;
    using System.Windows.Forms.Layout;
 
    internal sealed class CheckBoxStandardAdapter : CheckBoxBaseAdapter {
 
        internal CheckBoxStandardAdapter(ButtonBase control) : base(control) {}
 
        internal override void PaintUp(PaintEventArgs e, CheckState state)
        {
            if (Control.Appearance == Appearance.Button) {
				ButtonAdapter.PaintUp(e, Control.CheckState);
            }
            else {
                ColorData colors = PaintRender(e.Graphics).Calculate();
                LayoutData layout = Layout(e).Layout();
                PaintButtonBackground(e, Control.ClientRectangle, null);
 
                if (!layout.options.everettButtonCompat) {
                    layout.textBounds.Offset(-1, -1); 
                }
                layout.imageBounds.Offset(-1, -1);
 
                AdjustFocusRectangle(layout);
 
                if (!AccessibilityImprovements.Level2 || !String.IsNullOrEmpty(Control.Text)) {
                    //minor adjustment to make sure the appearance is exactly the same as Win32 app.
                    int focusRectFixup = layout.focus.X & 0x1; // if it's odd, subtract one pixel for fixup.
                    if (!Application.RenderWithVisualStyles) {
                        focusRectFixup = 1 - focusRectFixup;
                    }
                    layout.focus.Offset(-(focusRectFixup + 1), -2);
                    layout.focus.Width = layout.textBounds.Width + layout.imageBounds.Width - 1;
                    layout.focus.Intersect(layout.textBounds);
 
                    if (layout.options.textAlign != LayoutUtils.AnyLeft && layout.options.useCompatibleTextRendering && layout.options.font.Italic) {
                        // fixup for GDI+ text rendering.  VSW#515164
                        layout.focus.Width += 2;
                    }
                }
 
                PaintImage(e, layout);
                DrawCheckBox(e, layout);
                PaintField(e, layout, colors, colors.windowText, true);
            }
        }
        
        internal override void PaintDown(PaintEventArgs e, CheckState state) {
            if (Control.Appearance == Appearance.Button) {
				ButtonAdapter.PaintDown(e, Control.CheckState);
            }
            else {
                PaintUp(e, state);
            }
        }
        
        internal override void PaintOver(PaintEventArgs e, CheckState state) {
            if (Control.Appearance == Appearance.Button) {
				ButtonAdapter.PaintOver(e, Control.CheckState);
            }
            else {
                PaintUp(e, state);
            }
        }        
 
        internal override Size GetPreferredSizeCore(Size proposedSize) {
            if (Control.Appearance == Appearance.Button) {
				ButtonStandardAdapter adapter = new ButtonStandardAdapter(Control);
                return adapter.GetPreferredSizeCore(proposedSize);
            } 
            else {
                using (Graphics measurementGraphics = WindowsFormsUtils.CreateMeasurementGraphics()) {
                    using (PaintEventArgs pe = new PaintEventArgs(measurementGraphics, new Rectangle())) {
                        LayoutOptions options = Layout(pe);
                        
                        return options.GetPreferredSizeCore(proposedSize);
                    }
                }
            }
        }
 
        #region Layout
 
        private new ButtonStandardAdapter ButtonAdapter {
            get {
                return ((ButtonStandardAdapter)base.ButtonAdapter);
            }
        }
 
        protected override ButtonBaseAdapter CreateButtonAdapter() {
            return new ButtonStandardAdapter(Control);
        }
 
        protected override LayoutOptions Layout(PaintEventArgs e) {
            LayoutOptions layout = CommonLayout();
            layout.checkPaddingSize  = 1;
            layout.everettButtonCompat = !Application.RenderWithVisualStyles;            
 
            // VSWhidbey 420870
            if (Application.RenderWithVisualStyles) {
                using (Graphics g = WindowsFormsUtils.CreateMeasurementGraphics()) {
                    layout.checkSize = CheckBoxRenderer.GetGlyphSize(g, CheckBoxRenderer.ConvertFromButtonState(GetState(), true, Control.MouseIsOver), Control.HandleInternal).Width;
                }
            }
            // Dev10 bug 525537
            else {
                if (DpiHelper.EnableDpiChangedMessageHandling) {
                    layout.checkSize = Control.LogicalToDeviceUnits(layout.checkSize);
                } 
                else { 
                    layout.checkSize = (int)(layout.checkSize * GetDpiScaleRatio(e.Graphics));
                }
            }
 
            return layout;
        }
 
        #endregion
    }
}