mirror of
https://github.com/ShareX/ShareX.git
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275 lines
No EOL
9.1 KiB
C#
275 lines
No EOL
9.1 KiB
C#
#region License Information (GPL v3)
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/*
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ShareX - A program that allows you to take screenshots and share any file type
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Copyright (C) 2008-2014 ShareX Developers
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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Optionally you can also view the license at <http://www.gnu.org/licenses/>.
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*/
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#endregion License Information (GPL v3)
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using System;
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using System.Drawing;
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using System.Windows.Forms;
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using System.Windows.Forms.VisualStyles;
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namespace HelpersLib
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{
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public class ToolStripRadioButtonMenuItem : ToolStripMenuItem
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{
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public ToolStripRadioButtonMenuItem()
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{
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Initialize();
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}
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public ToolStripRadioButtonMenuItem(string text)
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: base(text, null, (EventHandler)null)
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{
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Initialize();
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}
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public ToolStripRadioButtonMenuItem(Image image)
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: base(null, image, (EventHandler)null)
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{
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Initialize();
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}
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public ToolStripRadioButtonMenuItem(string text, Image image)
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: base(text, image, (EventHandler)null)
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{
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Initialize();
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}
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public ToolStripRadioButtonMenuItem(string text, Image image,
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EventHandler onClick)
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: base(text, image, onClick)
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{
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Initialize();
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}
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public ToolStripRadioButtonMenuItem(string text, Image image,
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EventHandler onClick, string name)
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: base(text, image, onClick, name)
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{
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Initialize();
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}
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public ToolStripRadioButtonMenuItem(string text, Image image,
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params ToolStripItem[] dropDownItems)
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: base(text, image, dropDownItems)
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{
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Initialize();
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}
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public ToolStripRadioButtonMenuItem(string text, Image image,
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EventHandler onClick, Keys shortcutKeys)
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: base(text, image, onClick)
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{
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Initialize();
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ShortcutKeys = shortcutKeys;
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}
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// Called by all constructors to initialize CheckOnClick.
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private void Initialize()
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{
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CheckOnClick = true;
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}
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protected override void OnCheckedChanged(EventArgs e)
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{
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base.OnCheckedChanged(e);
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if (Checked && Parent != null)
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{
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// Clear the checked state for all siblings.
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foreach (ToolStripItem item in Parent.Items)
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{
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ToolStripRadioButtonMenuItem radioItem = item as ToolStripRadioButtonMenuItem;
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if (radioItem != null && radioItem != this && radioItem.Checked)
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{
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radioItem.Checked = false;
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// Only one item can be selected at a time,
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// so there is no need to continue.
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return;
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}
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}
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}
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}
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protected override void OnClick(EventArgs e)
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{
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// If the item is already in the checked state, do not call
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// the base method, which would toggle the value.
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if (Checked) return;
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base.OnClick(e);
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}
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// Let the item paint itself, and then paint the RadioButton
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// where the check mark is displayed, covering the check mark
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// if it is present.
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protected override void OnPaint(PaintEventArgs e)
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{
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base.OnPaint(e);
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// If the client sets the Image property, the selection behavior
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// remains unchanged, but the RadioButton is not displayed and the
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// selection is indicated only by the selection rectangle.
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if (Image != null) return;
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// Determine the correct state of the RadioButton.
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RadioButtonState buttonState = RadioButtonState.UncheckedNormal;
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if (Enabled)
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{
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if (mouseDownState)
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{
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if (Checked) buttonState = RadioButtonState.CheckedPressed;
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else buttonState = RadioButtonState.UncheckedPressed;
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}
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else if (mouseHoverState)
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{
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if (Checked) buttonState = RadioButtonState.CheckedHot;
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else buttonState = RadioButtonState.UncheckedHot;
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}
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else
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{
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if (Checked) buttonState = RadioButtonState.CheckedNormal;
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}
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}
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else
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{
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if (Checked) buttonState = RadioButtonState.CheckedDisabled;
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else buttonState = RadioButtonState.UncheckedDisabled;
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}
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// Calculate the position at which to display the RadioButton.
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Int32 offset = (ContentRectangle.Height -
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RadioButtonRenderer.GetGlyphSize(
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e.Graphics, buttonState).Height) / 2;
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Point imageLocation = new Point(
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ContentRectangle.Location.X + 4,
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ContentRectangle.Location.Y + offset);
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// If the item is selected and the RadioButton paints with partial
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// transparency, such as when theming is enabled, the check mark
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// shows through the RadioButton image. In this case, paint a
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// non-transparent background first to cover the check mark.
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if (Checked && RadioButtonRenderer
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.IsBackgroundPartiallyTransparent(buttonState))
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{
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Size glyphSize = RadioButtonRenderer
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.GetGlyphSize(e.Graphics, buttonState);
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glyphSize.Height--;
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glyphSize.Width--;
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Rectangle backgroundRectangle =
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new Rectangle(imageLocation, glyphSize);
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e.Graphics.FillEllipse(
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SystemBrushes.Control, backgroundRectangle);
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}
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RadioButtonRenderer.DrawRadioButton(
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e.Graphics, imageLocation, buttonState);
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}
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private bool mouseHoverState;
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protected override void OnMouseEnter(EventArgs e)
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{
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mouseHoverState = true;
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// Force the item to repaint with the new RadioButton state.
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Invalidate();
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base.OnMouseEnter(e);
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}
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protected override void OnMouseLeave(EventArgs e)
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{
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mouseHoverState = false;
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base.OnMouseLeave(e);
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}
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private bool mouseDownState;
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protected override void OnMouseDown(MouseEventArgs e)
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{
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mouseDownState = true;
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// Force the item to repaint with the new RadioButton state.
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Invalidate();
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base.OnMouseDown(e);
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}
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protected override void OnMouseUp(MouseEventArgs e)
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{
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mouseDownState = false;
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base.OnMouseUp(e);
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}
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// Enable the item only if its parent item is in the checked state
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// and its Enabled property has not been explicitly set to false.
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public override bool Enabled
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{
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get
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{
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ToolStripMenuItem ownerMenuItem =
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OwnerItem as ToolStripMenuItem;
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// Use the base value in design mode to prevent the designer
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// from setting the base value to the calculated value.
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if (!DesignMode &&
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ownerMenuItem != null && ownerMenuItem.CheckOnClick)
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{
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return base.Enabled && ownerMenuItem.Checked;
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}
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return base.Enabled;
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}
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set
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{
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base.Enabled = value;
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}
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}
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// When OwnerItem becomes available, if it is a ToolStripMenuItem
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// with a CheckOnClick property value of true, subscribe to its
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// CheckedChanged event.
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protected override void OnOwnerChanged(EventArgs e)
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{
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ToolStripMenuItem ownerMenuItem =
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OwnerItem as ToolStripMenuItem;
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if (ownerMenuItem != null && ownerMenuItem.CheckOnClick)
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{
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ownerMenuItem.CheckedChanged +=
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OwnerMenuItem_CheckedChanged;
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}
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base.OnOwnerChanged(e);
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}
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// When the checked state of the parent item changes,
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// repaint the item so that the new Enabled state is displayed.
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private void OwnerMenuItem_CheckedChanged(
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object sender, EventArgs e)
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{
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Invalidate();
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}
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}
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} |