mirror of
https://github.com/xcp-ng/xenadmin.git
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410 lines
14 KiB
C#
410 lines
14 KiB
C#
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/* Copyright (c) Citrix Systems Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Drawing;
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using System.Data;
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using System.Text;
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using System.Windows.Forms;
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using System.Drawing.Drawing2D;
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namespace XenAdmin.Controls.GradientPanel
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{
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public partial class GradientPanel : Panel
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{
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public enum Schemes
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{
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Tab,
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Properties,
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Title,
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}
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#if xmas
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private readonly Timer refreshTimer;
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private readonly Random random = new Random();
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private const int MaxStars = 16;
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private const float MaxSpeed = 0.012f;
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private const float MaxAngularVelocity = 0.001f;
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private const int MinStarSize = 5;
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private const int MaxStarSize = 13;
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private const int MinStarSeparation = 30;
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private const int MinStarPoints = 5;
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private const int MaxStarPoints = 9;
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private const int MinSpikiness = 3;
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private const int MaxSpikiness = 6;
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private const double NewStarProbability = 0.04;
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private const double EggProbability = 0.001;
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private bool starsEnabled;
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public bool StarsEnabled
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{
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get
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{
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return starsEnabled;
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}
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set
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{
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if (value == starsEnabled)
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return;
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if (value)
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{
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refreshTimer.Start();
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}
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else
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{
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refreshTimer.Stop();
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Invalidate();
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}
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starsEnabled = value;
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}
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}
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#endif
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public GradientPanel()
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{
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SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
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#if xmas
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refreshTimer = new Timer();
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refreshTimer.Interval = 60;
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refreshTimer.Tick += new EventHandler(refreshTimer_Tick);
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StarsEnabled = true;
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}
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private void refreshTimer_Tick(object sender, EventArgs e)
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{
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// Hack
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if (this.Height != 50)
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{
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StarsEnabled = false;
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}
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Invalidate();
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#endif
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}
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#region Properties
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private Schemes scheme;
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public Schemes Scheme
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{
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set
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{
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scheme = value;
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Invalidate();
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}
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get
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{
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return scheme;
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}
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}
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#endregion
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private Brush NonVisualStylesBrush
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{
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get
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{
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switch (scheme)
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{
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case Schemes.Tab:
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return SystemBrushes.Control;
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case Schemes.Properties:
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return SystemBrushes.Control;
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case Schemes.Title:
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return SystemBrushes.Control;
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default:
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System.Diagnostics.Trace.Assert(false);
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return null;
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}
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}
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}
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private Brush GradientBrush(Rectangle bounds)
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{
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switch (scheme)
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{
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case Schemes.Tab:
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return new LinearGradientBrush(bounds, Program.HeaderGradientStartColor, Program.HeaderGradientEndColor, LinearGradientMode.Horizontal);
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case Schemes.Properties:
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return new LinearGradientBrush(bounds, Program.HeaderGradientStartColor, Program.HeaderGradientEndColor, LinearGradientMode.Horizontal);
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case Schemes.Title:
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return new LinearGradientBrush(bounds, Program.TitleBarStartColor, Program.TitleBarEndColor, LinearGradientMode.Vertical);
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default:
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System.Diagnostics.Trace.Assert(false);
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return null;
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}
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}
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protected override void OnPaint(PaintEventArgs e)
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{
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if (Size.Width == 0 || Size.Height == 0)
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return;
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Rectangle bounds = new Rectangle(Point.Empty, Size);
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if (!Application.RenderWithVisualStyles)
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{
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e.Graphics.FillRectangle(NonVisualStylesBrush, bounds);
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}
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else
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{
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using (Brush b = GradientBrush(bounds))
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{
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ButtonRenderer.DrawParentBackground(e.Graphics, bounds, this);
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e.Graphics.FillRectangle(b, bounds);
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#if xmas
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if (StarsEnabled)
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{
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// Update position of each star
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foreach (Star star in stars)
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{
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if (star.isEgg)
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{
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star.Y += MaxSpeed * 5;
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}
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else
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{
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star.Y += star.Radius * MaxSpeed;
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star.Theta += star.AngularVelocity;
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}
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}
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// Remove stars that have fallen off the bottom
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stars.RemoveAll(delegate(Star star)
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{
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return star.Y - star.Radius > this.Bottom;
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});
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if (stars.Count < MaxStars && random.NextDouble() < NewStarProbability)
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{
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// Add new star
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Star newStar = new Star();
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newStar.Radius = random.Next(MinStarSize, MaxStarSize);
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newStar.X = random.Next(0, bounds.Width);
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newStar.Y = -newStar.Radius;
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newStar.AngularVelocity = (float)(random.NextDouble() * MaxAngularVelocity);
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if (random.NextDouble() > 0.5)
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{
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newStar.AngularVelocity = -newStar.AngularVelocity;
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}
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if (random.NextDouble() < EggProbability)
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{
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newStar.isEgg = true;
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newStar.Radius = 40;
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newStar.Y = -newStar.Radius;
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newStar.Theta = 0.1f * (float)(-0.5 + random.NextDouble());
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}
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else
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{
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newStar.NumPoints = random.Next(MinStarPoints, MaxStarPoints);
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newStar.Spikiness = random.Next(MinSpikiness, MaxSpikiness) / 10.0f;
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}
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if (!ContainsClose(stars, newStar, MinStarSeparation))
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{
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// Reject star if there is another nearby
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stars.Add(newStar);
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}
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}
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e.Graphics.SmoothingMode = SmoothingMode.HighQuality;
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foreach (Star star in stars)
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{
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e.Graphics.ResetTransform();
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e.Graphics.TranslateTransform(star.X, star.Y);
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e.Graphics.RotateTransform(360 * star.Theta);
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if (star.isEgg)
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{
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e.Graphics.ScaleTransform(0.35f, 0.35f);
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using (Pen bluePen = new Pen(Color.SteelBlue, 3f), redPen = new Pen(Color.Red, 3f))
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{
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e.Graphics.FillPath(Brushes.MistyRose, EggBeziers);
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e.Graphics.DrawPath(redPen, EggStripe);
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e.Graphics.FillPath(Brushes.Yellow, EggStripe);
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e.Graphics.DrawPath(bluePen, EggBeziers);
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}
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}
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else
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{
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PointF[] points = GetStarShape(star.NumPoints, star.Radius, star.Spikiness);
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e.Graphics.DrawPolygon(Pens.DodgerBlue, points);
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using (SolidBrush brush = new SolidBrush(Color.FromArgb(200, Color.LightBlue)))
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{
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e.Graphics.FillPolygon(brush, points);
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}
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}
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}
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}
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#endif
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}
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}
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if (scheme == Schemes.Title)
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{
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using (Pen p = new Pen(Program.TitleBarBorderColor))
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{
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e.Graphics.DrawRectangle(p, new Rectangle(bounds.Left, bounds.Top, bounds.Width - 1, bounds.Height - 1));
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}
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}
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}
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protected override void OnPaintBackground(PaintEventArgs e)
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{
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// do nothing
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}
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#if xmas
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private static readonly List<Star> stars = new List<Star>();
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private class Star
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{
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public float X, Y, Radius, Theta, AngularVelocity;
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public int NumPoints;
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public double Spikiness;
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public bool isEgg;
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}
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/// <summary>
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/// Determines if there is a star in the list within maxRadius of the given star.
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/// </summary>
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/// <param name="centres"></param>
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/// <param name="centre"></param>
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/// <param name="maxRadius"></param>
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/// <returns></returns>
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private static bool ContainsClose(List<Star> stars, Star s, int maxRadius)
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{
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foreach (Star star in stars)
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{
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if (Math.Sqrt(Math.Pow(star.X - s.X, 2) + Math.Pow(star.Y - s.Y, 2)) < maxRadius)
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{
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return true;
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}
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}
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return false;
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}
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private static PointF[] GetStarShape(int points, double radius, double ratio)
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{
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List<PointF> result = new List<PointF>();
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bool odd = false;
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for (double theta = 0; theta < 2 * Math.PI; theta += ((2 * Math.PI) / (2 * points)))
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{
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result.Add(RadialToCartesian(theta, odd ? ratio * radius : radius));
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odd = !odd;
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}
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return result.ToArray();
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}
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private static PointF RadialToCartesian(double theta, double r)
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{
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return new PointF((float)(r * Math.Cos(theta)), (float)(r * Math.Sin(theta)));
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}
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private static GraphicsPath eggBeziers;
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private static GraphicsPath EggBeziers
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{
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get
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{
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if (eggBeziers == null)
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{
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eggBeziers = new GraphicsPath();
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eggBeziers.AddBeziers(new PointF[] {
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new PointF(0, 0),
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new PointF(12, 0),
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new PointF(24, 18),
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new PointF(24, 40),
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new PointF(24, 56),
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new PointF(12, 65),
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new PointF(0, 65),
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new PointF(-12, 65),
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new PointF(-24, 56),
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new PointF(-24, 40),
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new PointF(-24, 18),
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new PointF(-12, 0),
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new PointF(0, 0)
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});
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}
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return eggBeziers;
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}
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}
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private static GraphicsPath eggStripe;
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private static GraphicsPath EggStripe
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{
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get
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{
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if (eggStripe == null)
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{
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eggStripe = new GraphicsPath();
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eggStripe.AddLines(new PointF[] {
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new PointF(-23 ,32),
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new PointF(-16, 36),
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new PointF(-8, 31),
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new PointF(0, 36),
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new PointF(8, 31),
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new PointF(16, 36),
|
|||
|
|
|
|||
|
|
new PointF(23, 32),
|
|||
|
|
new PointF(23, 42),
|
|||
|
|
|
|||
|
|
new PointF(16, 51),
|
|||
|
|
new PointF(8, 46),
|
|||
|
|
new PointF(0, 51),
|
|||
|
|
new PointF(-8, 46),
|
|||
|
|
new PointF(-16, 51),
|
|||
|
|
new PointF(-23, 47)
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return eggStripe;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
#endif
|
|||
|
|
}
|
|||
|
|
}
|