// Copyright 2012-2014 Andrew C. Dvorak
//
// This file is part of BDHero.
//
// BDHero is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// BDHero is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with BDHero. If not, see <http://www.gnu.org/licenses/>.
using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
using System.Windows.Forms.VisualStyles;
//Get the latest version of SplitButton at: http://wyday.com/splitbutton/
namespace DotNetUtils.Controls
{
public class SplitButton : Button
{
PushButtonState _state;
const int SplitSectionWidth = 18;
static int BorderSize = SystemInformation.Border3DSize.Width * 2;
bool skipNextOpen;
Rectangle dropDownRectangle;
bool showSplit;
bool isSplitMenuVisible;
ContextMenuStrip m_SplitMenuStrip;
ContextMenu m_SplitMenu;
TextFormatFlags textFormatFlags = TextFormatFlags.Default;
public SplitButton()
{
AutoSize = true;
}
#region Properties
[Browsable(false)]
public override ContextMenuStrip ContextMenuStrip
{
get
{
return SplitMenuStrip;
}
set
{
SplitMenuStrip = value;
}
}
[DefaultValue(null)]
public ContextMenu SplitMenu
{
get { return m_SplitMenu; }
set
{
//remove the event handlers for the old SplitMenu
if (m_SplitMenu != null)
{
m_SplitMenu.Popup -= SplitMenu_Popup;
}
//add the event handlers for the new SplitMenu
if (value != null)
{
ShowSplit = true;
value.Popup += SplitMenu_Popup;
}
else
ShowSplit = false;
m_SplitMenu = value;
}
}
[DefaultValue(null)]
public ContextMenuStrip SplitMenuStrip
{
get
{
return m_SplitMenuStrip;
}
set
{
//remove the event handlers for the old SplitMenuStrip
if (m_SplitMenuStrip != null)
{
m_SplitMenuStrip.Closing -= SplitMenuStrip_Closing;
m_SplitMenuStrip.Opening -= SplitMenuStrip_Opening;
}
//add the event handlers for the new SplitMenuStrip
if (value != null)
{
ShowSplit = true;
value.Closing += SplitMenuStrip_Closing;
value.Opening += SplitMenuStrip_Opening;
}
else
ShowSplit = false;
m_SplitMenuStrip = value;
}
}
[DefaultValue(false)]
public bool ShowSplit
{
set
{
if (value != showSplit)
{
showSplit = value;
Invalidate();
if (Parent != null)
Parent.PerformLayout();
}
}
}
private PushButtonState State
{
get
{
return _state;
}
set
{
if (!_state.Equals(value))
{
_state = value;
Invalidate();
}
}
}
#endregion Properties
protected override bool IsInputKey(Keys keyData)
{
if (keyData.Equals(Keys.Down) && showSplit)
return true;
return base.IsInputKey(keyData);
}
protected override void OnGotFocus(EventArgs e)
{
if (!showSplit)
{
base.OnGotFocus(e);
return;
}
if (!State.Equals(PushButtonState.Pressed) && !State.Equals(PushButtonState.Disabled))
{
State = PushButtonState.Default;
}
}
protected override void OnKeyDown(KeyEventArgs kevent)
{
if (showSplit)
{
if (kevent.KeyCode.Equals(Keys.Down) && !isSplitMenuVisible)
{
ShowContextMenuStrip();
}
else if (kevent.KeyCode.Equals(Keys.Space) && kevent.Modifiers == Keys.None)
{
State = PushButtonState.Pressed;
}
}
base.OnKeyDown(kevent);
}
protected override void OnKeyUp(KeyEventArgs kevent)
{
if (kevent.KeyCode.Equals(Keys.Space))
{
if (MouseButtons == MouseButtons.None)
{
State = PushButtonState.Normal;
}
}
else if (kevent.KeyCode.Equals(Keys.Apps))
{
if (MouseButtons == MouseButtons.None && !isSplitMenuVisible)
{
ShowContextMenuStrip();
}
}
base.OnKeyUp(kevent);
}
protected override void OnEnabledChanged(EventArgs e)
{
State = Enabled ? PushButtonState.Normal : PushButtonState.Disabled;
base.OnEnabledChanged(e);
}
protected override void OnLostFocus(EventArgs e)
{
if (!showSplit)
{
base.OnLostFocus(e);
return;
}
if (!State.Equals(PushButtonState.Pressed) && !State.Equals(PushButtonState.Disabled))
{
State = PushButtonState.Normal;
}
}
bool isMouseEntered;
protected override void OnMouseEnter(EventArgs e)
{
if (!showSplit)
{
base.OnMouseEnter(e);
return;
}
isMouseEntered = true;
if (!State.Equals(PushButtonState.Pressed) && !State.Equals(PushButtonState.Disabled))
{
State = PushButtonState.Hot;
}
}
protected override void OnMouseLeave(EventArgs e)
{
if (!showSplit)
{
base.OnMouseLeave(e);
return;
}
isMouseEntered = false;
if (!State.Equals(PushButtonState.Pressed) && !State.Equals(PushButtonState.Disabled))
{
State = Focused ? PushButtonState.Default : PushButtonState.Normal;
}
}
protected override void OnMouseDown(MouseEventArgs e)
{
if (!showSplit)
{
base.OnMouseDown(e);
return;
}
//handle ContextMenu re-clicking the drop-down region to close the menu
if (m_SplitMenu != null && e.Button == MouseButtons.Left && !isMouseEntered)
skipNextOpen = true;
if (dropDownRectangle.Contains(e.Location) && !isSplitMenuVisible && e.Button == MouseButtons.Left)
{
ShowContextMenuStrip();
}
else
{
State = PushButtonState.Pressed;
}
}
protected override void OnMouseUp(MouseEventArgs mevent)
{
if (!showSplit)
{
base.OnMouseUp(mevent);
return;
}
// if the right button was released inside the button
if (mevent.Button == MouseButtons.Right && ClientRectangle.Contains(mevent.Location) && !isSplitMenuVisible)
{
ShowContextMenuStrip();
}
else if (m_SplitMenuStrip == null && m_SplitMenu == null || !isSplitMenuVisible)
{
SetButtonDrawState();
if (ClientRectangle.Contains(mevent.Location) && !dropDownRectangle.Contains(mevent.Location))
{
OnClick(new EventArgs());
}
}
}
protected override void OnPaint(PaintEventArgs pevent)
{
base.OnPaint(pevent);
if (!showSplit)
return;
Graphics g = pevent.Graphics;
Rectangle bounds = ClientRectangle;
// draw the button background as according to the current state.
if (State != PushButtonState.Pressed && IsDefault && !Application.RenderWithVisualStyles)
{
Rectangle backgroundBounds = bounds;
backgroundBounds.Inflate(-1, -1);
ButtonRenderer.DrawButton(g, backgroundBounds, State);
// button renderer doesnt draw the black frame when themes are off
g.DrawRectangle(SystemPens.WindowFrame, 0, 0, bounds.Width - 1, bounds.Height - 1);
}
else
{
ButtonRenderer.DrawButton(g, bounds, State);
}
// calculate the current dropdown rectangle.
dropDownRectangle = new Rectangle(bounds.Right - SplitSectionWidth, 0, SplitSectionWidth, bounds.Height);
int internalBorder = BorderSize;
Rectangle focusRect =
new Rectangle(internalBorder - 1,
internalBorder - 1,
bounds.Width - dropDownRectangle.Width - internalBorder,
bounds.Height - (internalBorder * 2) + 2);
bool drawSplitLine = (State == PushButtonState.Hot || State == PushButtonState.Pressed || !Application.RenderWithVisualStyles);
if (RightToLeft == RightToLeft.Yes)
{
dropDownRectangle.X = bounds.Left + 1;
focusRect.X = dropDownRectangle.Right;
if (drawSplitLine)
{
// draw two lines at the edge of the dropdown button
g.DrawLine(SystemPens.ButtonShadow, bounds.Left + SplitSectionWidth, BorderSize, bounds.Left + SplitSectionWidth, bounds.Bottom - BorderSize);
g.DrawLine(SystemPens.ButtonFace, bounds.Left + SplitSectionWidth + 1, BorderSize, bounds.Left + SplitSectionWidth + 1, bounds.Bottom - BorderSize);
}
}
else
{
if (drawSplitLine)
{
// draw two lines at the edge of the dropdown button
g.DrawLine(SystemPens.ButtonShadow, bounds.Right - SplitSectionWidth, BorderSize, bounds.Right - SplitSectionWidth, bounds.Bottom - BorderSize);
g.DrawLine(SystemPens.ButtonFace, bounds.Right - SplitSectionWidth - 1, BorderSize, bounds.Right - SplitSectionWidth - 1, bounds.Bottom - BorderSize);
}
}
// Draw an arrow in the correct location
PaintArrow(g, dropDownRectangle);
//paint the image and text in the "button" part of the splitButton
PaintTextandImage(g, new Rectangle(0, 0, ClientRectangle.Width - SplitSectionWidth, ClientRectangle.Height));
// draw the focus rectangle.
if (State != PushButtonState.Pressed && Focused && ShowFocusCues)
{
ControlPaint.DrawFocusRectangle(g, focusRect);
}
}
private void PaintTextandImage(Graphics g, Rectangle bounds)
{
// Figure out where our text and image should go
Rectangle text_rectangle;
Rectangle image_rectangle;
CalculateButtonTextAndImageLayout(ref bounds, out text_rectangle, out image_rectangle);
//draw the image
if (Image != null)
{
if (Enabled)
g.DrawImage(Image, image_rectangle.X, image_rectangle.Y, Image.Width, Image.Height);
else
ControlPaint.DrawImageDisabled(g, Image, image_rectangle.X, image_rectangle.Y, BackColor);
}
// If we dont' use mnemonic, set formatFlag to NoPrefix as this will show ampersand.
if (!UseMnemonic)
textFormatFlags = textFormatFlags | TextFormatFlags.NoPrefix;
else if (!ShowKeyboardCues)
textFormatFlags = textFormatFlags | TextFormatFlags.HidePrefix;
//draw the text
if (!string.IsNullOrEmpty(Text))
{
if (Enabled)
TextRenderer.DrawText(g, Text, Font, text_rectangle, ForeColor, textFormatFlags);
else
ControlPaint.DrawStringDisabled(g, Text, Font, BackColor, text_rectangle, textFormatFlags);
}
}
private void PaintArrow(Graphics g, Rectangle dropDownRect)
{
Point middle = new Point(Convert.ToInt32(dropDownRect.Left + dropDownRect.Width / 2), Convert.ToInt32(dropDownRect.Top + dropDownRect.Height / 2));
//if the width is odd - favor pushing it over one pixel right.
middle.X += (dropDownRect.Width % 2);
Point[] arrow = new[] { new Point(middle.X - 2, middle.Y - 1), new Point(middle.X + 3, middle.Y - 1), new Point(middle.X, middle.Y + 2) };
if (Enabled)
g.FillPolygon(SystemBrushes.ControlText, arrow);
else
g.FillPolygon(SystemBrushes.ButtonShadow, arrow);
}
public override Size GetPreferredSize(Size proposedSize)
{
Size preferredSize = base.GetPreferredSize(proposedSize);
//autosize correctly for splitbuttons
if (showSplit)
{
if (AutoSize)
return CalculateButtonAutoSize();
if (!string.IsNullOrEmpty(Text) && TextRenderer.MeasureText(Text, Font).Width + SplitSectionWidth > preferredSize.Width)
return preferredSize + new Size(SplitSectionWidth + BorderSize * 2, 0);
}
return preferredSize;
}
private Size CalculateButtonAutoSize()
{
Size ret_size = Size.Empty;
Size text_size = TextRenderer.MeasureText(Text, Font);
Size image_size = Image == null ? Size.Empty : Image.Size;
// Pad the text size
if (Text.Length != 0)
{
text_size.Height += 4;
text_size.Width += 4;
}
switch (TextImageRelation)
{
case TextImageRelation.Overlay:
ret_size.Height = Math.Max(Text.Length == 0 ? 0 : text_size.Height, image_size.Height);
ret_size.Width = Math.Max(text_size.Width, image_size.Width);
break;
case TextImageRelation.ImageAboveText:
case TextImageRelation.TextAboveImage:
ret_size.Height = text_size.Height + image_size.Height;
ret_size.Width = Math.Max(text_size.Width, image_size.Width);
break;
case TextImageRelation.ImageBeforeText:
case TextImageRelation.TextBeforeImage:
ret_size.Height = Math.Max(text_size.Height, image_size.Height);
ret_size.Width = text_size.Width + image_size.Width;
break;
}
// Pad the result
ret_size.Height += (Padding.Vertical + 6);
ret_size.Width += (Padding.Horizontal + 6);
//pad the splitButton arrow region
if (showSplit)
ret_size.Width += SplitSectionWidth;
return ret_size;
}
#region Button Layout Calculations
//The following layout functions were taken from Mono's Windows.Forms
//implementation, specifically "ThemeWin32Classic.cs",
//then modified to fit the context of this splitButton
private void CalculateButtonTextAndImageLayout(ref Rectangle content_rect, out Rectangle textRectangle, out Rectangle imageRectangle)
{
Size text_size = TextRenderer.MeasureText(Text, Font, content_rect.Size, textFormatFlags);
Size image_size = Image == null ? Size.Empty : Image.Size;
textRectangle = Rectangle.Empty;
imageRectangle = Rectangle.Empty;
switch (TextImageRelation)
{
case TextImageRelation.Overlay:
// Overlay is easy, text always goes here
textRectangle = OverlayObjectRect(ref content_rect, ref text_size, TextAlign); // Rectangle.Inflate(content_rect, -4, -4);
//Offset on Windows 98 style when button is pressed
if (_state == PushButtonState.Pressed && !Application.RenderWithVisualStyles)
textRectangle.Offset(1, 1);
// Image is dependent on ImageAlign
if (Image != null)
imageRectangle = OverlayObjectRect(ref content_rect, ref image_size, ImageAlign);
break;
case TextImageRelation.ImageAboveText:
content_rect.Inflate(-4, -4);
LayoutTextAboveOrBelowImage(content_rect, false, text_size, image_size, out textRectangle, out imageRectangle);
break;
case TextImageRelation.TextAboveImage:
content_rect.Inflate(-4, -4);
LayoutTextAboveOrBelowImage(content_rect, true, text_size, image_size, out textRectangle, out imageRectangle);
break;
case TextImageRelation.ImageBeforeText:
content_rect.Inflate(-4, -4);
LayoutTextBeforeOrAfterImage(content_rect, false, text_size, image_size, out textRectangle, out imageRectangle);
break;
case TextImageRelation.TextBeforeImage:
content_rect.Inflate(-4, -4);
LayoutTextBeforeOrAfterImage(content_rect, true, text_size, image_size, out textRectangle, out imageRectangle);
break;
}
}
private static Rectangle OverlayObjectRect(ref Rectangle container, ref Size sizeOfObject, System.Drawing.ContentAlignment alignment)
{
int x, y;
switch (alignment)
{
case System.Drawing.ContentAlignment.TopLeft:
x = 4;
y = 4;
break;
case System.Drawing.ContentAlignment.TopCenter:
x = (container.Width - sizeOfObject.Width) / 2;
y = 4;
break;
case System.Drawing.ContentAlignment.TopRight:
x = container.Width - sizeOfObject.Width - 4;
y = 4;
break;
case System.Drawing.ContentAlignment.MiddleLeft:
x = 4;
y = (container.Height - sizeOfObject.Height) / 2;
break;
case System.Drawing.ContentAlignment.MiddleCenter:
x = (container.Width - sizeOfObject.Width) / 2;
y = (container.Height - sizeOfObject.Height) / 2;
break;
case System.Drawing.ContentAlignment.MiddleRight:
x = container.Width - sizeOfObject.Width - 4;
y = (container.Height - sizeOfObject.Height) / 2;
break;
case System.Drawing.ContentAlignment.BottomLeft:
x = 4;
y = container.Height - sizeOfObject.Height - 4;
break;
case System.Drawing.ContentAlignment.BottomCenter:
x = (container.Width - sizeOfObject.Width) / 2;
y = container.Height - sizeOfObject.Height - 4;
break;
case System.Drawing.ContentAlignment.BottomRight:
x = container.Width - sizeOfObject.Width - 4;
y = container.Height - sizeOfObject.Height - 4;
break;
default:
x = 4;
y = 4;
break;
}
return new Rectangle(x, y, sizeOfObject.Width, sizeOfObject.Height);
}
private void LayoutTextBeforeOrAfterImage(Rectangle totalArea, bool textFirst, Size textSize, Size imageSize, out Rectangle textRect, out Rectangle imageRect)
{
int element_spacing = 0; // Spacing between the Text and the Image
int total_width = textSize.Width + element_spacing + imageSize.Width;
if (!textFirst)
element_spacing += 2;
// If the text is too big, chop it down to the size we have available to it
if (total_width > totalArea.Width)
{
textSize.Width = totalArea.Width - element_spacing - imageSize.Width;
total_width = totalArea.Width;
}
int excess_width = totalArea.Width - total_width;
int offset = 0;
Rectangle final_text_rect;
Rectangle final_image_rect;
HorizontalAlignment h_text = GetHorizontalAlignment(TextAlign);
HorizontalAlignment h_image = GetHorizontalAlignment(ImageAlign);
if (h_image == HorizontalAlignment.Left)
offset = 0;
else if (h_image == HorizontalAlignment.Right && h_text == HorizontalAlignment.Right)
offset = excess_width;
else if (h_image == HorizontalAlignment.Center && (h_text == HorizontalAlignment.Left || h_text == HorizontalAlignment.Center))
offset += excess_width / 3;
else
offset += 2 * (excess_width / 3);
if (textFirst)
{
final_text_rect = new Rectangle(totalArea.Left + offset, AlignInRectangle(totalArea, textSize, TextAlign).Top, textSize.Width, textSize.Height);
final_image_rect = new Rectangle(final_text_rect.Right + element_spacing, AlignInRectangle(totalArea, imageSize, ImageAlign).Top, imageSize.Width, imageSize.Height);
}
else
{
final_image_rect = new Rectangle(totalArea.Left + offset, AlignInRectangle(totalArea, imageSize, ImageAlign).Top, imageSize.Width, imageSize.Height);
final_text_rect = new Rectangle(final_image_rect.Right + element_spacing, AlignInRectangle(totalArea, textSize, TextAlign).Top, textSize.Width, textSize.Height);
}
textRect = final_text_rect;
imageRect = final_image_rect;
}
private void LayoutTextAboveOrBelowImage(Rectangle totalArea, bool textFirst, Size textSize, Size imageSize, out Rectangle textRect, out Rectangle imageRect)
{
int element_spacing = 0; // Spacing between the Text and the Image
int total_height = textSize.Height + element_spacing + imageSize.Height;
if (textFirst)
element_spacing += 2;
if (textSize.Width > totalArea.Width)
textSize.Width = totalArea.Width;
// If the there isn't enough room and we're text first, cut out the image
if (total_height > totalArea.Height && textFirst)
{
imageSize = Size.Empty;
total_height = totalArea.Height;
}
int excess_height = totalArea.Height - total_height;
int offset = 0;
Rectangle final_text_rect;
Rectangle final_image_rect;
VerticalAlignment v_text = GetVerticalAlignment(TextAlign);
VerticalAlignment v_image = GetVerticalAlignment(ImageAlign);
if (v_image == VerticalAlignment.Top)
offset = 0;
else if (v_image == VerticalAlignment.Bottom && v_text == VerticalAlignment.Bottom)
offset = excess_height;
else if (v_image == VerticalAlignment.Center && (v_text == VerticalAlignment.Top || v_text == VerticalAlignment.Center))
offset += excess_height / 3;
else
offset += 2 * (excess_height / 3);
if (textFirst)
{
final_text_rect = new Rectangle(AlignInRectangle(totalArea, textSize, TextAlign).Left, totalArea.Top + offset, textSize.Width, textSize.Height);
final_image_rect = new Rectangle(AlignInRectangle(totalArea, imageSize, ImageAlign).Left, final_text_rect.Bottom + element_spacing, imageSize.Width, imageSize.Height);
}
else
{
final_image_rect = new Rectangle(AlignInRectangle(totalArea, imageSize, ImageAlign).Left, totalArea.Top + offset, imageSize.Width, imageSize.Height);
final_text_rect = new Rectangle(AlignInRectangle(totalArea, textSize, TextAlign).Left, final_image_rect.Bottom + element_spacing, textSize.Width, textSize.Height);
if (final_text_rect.Bottom > totalArea.Bottom)
final_text_rect.Y = totalArea.Top;
}
textRect = final_text_rect;
imageRect = final_image_rect;
}
private static HorizontalAlignment GetHorizontalAlignment(System.Drawing.ContentAlignment align)
{
switch (align)
{
case System.Drawing.ContentAlignment.BottomLeft:
case System.Drawing.ContentAlignment.MiddleLeft:
case System.Drawing.ContentAlignment.TopLeft:
return HorizontalAlignment.Left;
case System.Drawing.ContentAlignment.BottomCenter:
case System.Drawing.ContentAlignment.MiddleCenter:
case System.Drawing.ContentAlignment.TopCenter:
return HorizontalAlignment.Center;
case System.Drawing.ContentAlignment.BottomRight:
case System.Drawing.ContentAlignment.MiddleRight:
case System.Drawing.ContentAlignment.TopRight:
return HorizontalAlignment.Right;
}
return HorizontalAlignment.Left;
}
private static VerticalAlignment GetVerticalAlignment(System.Drawing.ContentAlignment align)
{
switch (align)
{
case System.Drawing.ContentAlignment.TopLeft:
case System.Drawing.ContentAlignment.TopCenter:
case System.Drawing.ContentAlignment.TopRight:
return VerticalAlignment.Top;
case System.Drawing.ContentAlignment.MiddleLeft:
case System.Drawing.ContentAlignment.MiddleCenter:
case System.Drawing.ContentAlignment.MiddleRight:
return VerticalAlignment.Center;
case System.Drawing.ContentAlignment.BottomLeft:
case System.Drawing.ContentAlignment.BottomCenter:
case System.Drawing.ContentAlignment.BottomRight:
return VerticalAlignment.Bottom;
}
return VerticalAlignment.Top;
}
internal static Rectangle AlignInRectangle(Rectangle outer, Size inner, System.Drawing.ContentAlignment align)
{
int x = 0;
int y = 0;
if (align == System.Drawing.ContentAlignment.BottomLeft || align == System.Drawing.ContentAlignment.MiddleLeft || align == System.Drawing.ContentAlignment.TopLeft)
x = outer.X;
else if (align == System.Drawing.ContentAlignment.BottomCenter || align == System.Drawing.ContentAlignment.MiddleCenter || align == System.Drawing.ContentAlignment.TopCenter)
x = Math.Max(outer.X + ((outer.Width - inner.Width) / 2), outer.Left);
else if (align == System.Drawing.ContentAlignment.BottomRight || align == System.Drawing.ContentAlignment.MiddleRight || align == System.Drawing.ContentAlignment.TopRight)
x = outer.Right - inner.Width;
if (align == System.Drawing.ContentAlignment.TopCenter || align == System.Drawing.ContentAlignment.TopLeft || align == System.Drawing.ContentAlignment.TopRight)
y = outer.Y;
else if (align == System.Drawing.ContentAlignment.MiddleCenter || align == System.Drawing.ContentAlignment.MiddleLeft || align == System.Drawing.ContentAlignment.MiddleRight)
y = outer.Y + (outer.Height - inner.Height) / 2;
else if (align == System.Drawing.ContentAlignment.BottomCenter || align == System.Drawing.ContentAlignment.BottomRight || align == System.Drawing.ContentAlignment.BottomLeft)
y = outer.Bottom - inner.Height;
return new Rectangle(x, y, Math.Min(inner.Width, outer.Width), Math.Min(inner.Height, outer.Height));
}
#endregion Button Layout Calculations
private void ShowContextMenuStrip()
{
if (skipNextOpen)
{
// we were called because we're closing the context menu strip
// when clicking the dropdown button.
skipNextOpen = false;
return;
}
State = PushButtonState.Pressed;
if (m_SplitMenu != null)
{
m_SplitMenu.Show(this, new Point(0, Height));
}
else if (m_SplitMenuStrip != null)
{
m_SplitMenuStrip.Show(this, new Point(0, Height), ToolStripDropDownDirection.BelowRight);
}
}
void SplitMenuStrip_Opening(object sender, CancelEventArgs e)
{
isSplitMenuVisible = true;
}
void SplitMenuStrip_Closing(object sender, ToolStripDropDownClosingEventArgs e)
{
isSplitMenuVisible = false;
SetButtonDrawState();
if (e.CloseReason == ToolStripDropDownCloseReason.AppClicked)
{
skipNextOpen = (dropDownRectangle.Contains(PointToClient(Cursor.Position))) && MouseButtons == MouseButtons.Left;
}
}
void SplitMenu_Popup(object sender, EventArgs e)
{
isSplitMenuVisible = true;
}
protected override void WndProc(ref Message m)
{
//0x0212 == WM_EXITMENULOOP
if (m.Msg == 0x0212)
{
//this message is only sent when a ContextMenu is closed (not a ContextMenuStrip)
isSplitMenuVisible = false;
SetButtonDrawState();
}
base.WndProc(ref m);
}
private void SetButtonDrawState()
{
if (Bounds.Contains(Parent.PointToClient(Cursor.Position)))
{
State = PushButtonState.Hot;
}
else if (Focused)
{
State = PushButtonState.Default;
}
else if (!Enabled)
{
State = PushButtonState.Disabled;
}
else
{
State = PushButtonState.Normal;
}
}
}
}
