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meelstorm
2025-07-14 12:03:59 +02:00
commit d3cb790bd9
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framework/MaterialSkin.Core/Controls/MaterialTabSelector.cs Normal file
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using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Text;
using System.Windows.Forms;
using MaterialSkin.Animations;
namespace MaterialSkin.Controls
{
public class MaterialTabSelector : Control, IMaterialControl
{
[Browsable(false)]
public int Depth { get; set; }
[Browsable(false)]
public MaterialSkinManager SkinManager => MaterialSkinManager.Instance;
[Browsable(false)]
public MouseState MouseState { get; set; }
private MaterialTabControl _baseTabControl;
public MaterialTabControl BaseTabControl
{
get { return _baseTabControl; }
set
{
_baseTabControl = value;
if (_baseTabControl == null) return;
_previousSelectedTabIndex = _baseTabControl.SelectedIndex;
_baseTabControl.Deselected += (sender, args) =>
{
_previousSelectedTabIndex = _baseTabControl.SelectedIndex;
};
_baseTabControl.SelectedIndexChanged += (sender, args) =>
{
_animationManager.SetProgress(0);
_animationManager.StartNewAnimation(AnimationDirection.In);
};
_baseTabControl.ControlAdded += delegate
{
Invalidate();
};
_baseTabControl.ControlRemoved += delegate
{
Invalidate();
};
}
}
private int _previousSelectedTabIndex;
private Point _animationSource;
private readonly AnimationManager _animationManager;
private List<Rectangle> _tabRects;
private const int TAB_HEADER_PADDING = 24;
private const int TAB_INDICATOR_HEIGHT = 2;
public MaterialTabSelector()
{
SetStyle(ControlStyles.DoubleBuffer | ControlStyles.OptimizedDoubleBuffer, true);
Height = 48;
_animationManager = new AnimationManager
{
AnimationType = AnimationType.EaseOut,
Increment = 0.04
};
_animationManager.OnAnimationProgress += sender => Invalidate();
}
protected override void OnPaint(PaintEventArgs e)
{
var g = e.Graphics;
g.TextRenderingHint = TextRenderingHint.AntiAlias;
g.Clear(SkinManager.ColorScheme.PrimaryColor);
if (_baseTabControl == null) return;
if (!_animationManager.IsAnimating() || _tabRects == null || _tabRects.Count != _baseTabControl.TabCount)
UpdateTabRects();
var animationProgress = _animationManager.GetProgress();
//Click feedback
if (_animationManager.IsAnimating())
{
var rippleBrush = new SolidBrush(Color.FromArgb((int)(51 - (animationProgress * 50)), Color.White));
var rippleSize = (int)(animationProgress * _tabRects[_baseTabControl.SelectedIndex].Width * 1.75);
g.SetClip(_tabRects[_baseTabControl.SelectedIndex]);
g.FillEllipse(rippleBrush, new Rectangle(_animationSource.X - rippleSize / 2, _animationSource.Y - rippleSize / 2, rippleSize, rippleSize));
g.ResetClip();
rippleBrush.Dispose();
}
//Draw tab headers
foreach (TabPage tabPage in _baseTabControl.TabPages)
{
var currentTabIndex = _baseTabControl.TabPages.IndexOf(tabPage);
Brush textBrush = new SolidBrush(Color.FromArgb(CalculateTextAlpha(currentTabIndex, animationProgress), SkinManager.ColorScheme.TextColor));
g.DrawString(tabPage.Text.ToUpper(), SkinManager.ROBOTO_MEDIUM_10, textBrush, _tabRects[currentTabIndex], new StringFormat { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center });
textBrush.Dispose();
}
//Animate tab indicator
var previousSelectedTabIndexIfHasOne = _previousSelectedTabIndex == -1 ? _baseTabControl.SelectedIndex : _previousSelectedTabIndex;
var previousActiveTabRect = _tabRects[previousSelectedTabIndexIfHasOne];
var activeTabPageRect = _tabRects[_baseTabControl.SelectedIndex];
var y = activeTabPageRect.Bottom - 2;
var x = previousActiveTabRect.X + (int)((activeTabPageRect.X - previousActiveTabRect.X) * animationProgress);
var width = previousActiveTabRect.Width + (int)((activeTabPageRect.Width - previousActiveTabRect.Width) * animationProgress);
g.FillRectangle(SkinManager.ColorScheme.AccentBrush, x, y, width, TAB_INDICATOR_HEIGHT);
}
private int CalculateTextAlpha(int tabIndex, double animationProgress)
{
int primaryA = SkinManager.ACTION_BAR_TEXT.A;
int secondaryA = SkinManager.ACTION_BAR_TEXT_SECONDARY.A;
if (tabIndex == _baseTabControl.SelectedIndex && !_animationManager.IsAnimating())
{
return primaryA;
}
if (tabIndex != _previousSelectedTabIndex && tabIndex != _baseTabControl.SelectedIndex)
{
return secondaryA;
}
if (tabIndex == _previousSelectedTabIndex)
{
return primaryA - (int)((primaryA - secondaryA) * animationProgress);
}
return secondaryA + (int)((primaryA - secondaryA) * animationProgress);
}
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
if (_tabRects == null) UpdateTabRects();
for (var i = 0; i < _tabRects.Count; i++)
{
if (_tabRects[i].Contains(e.Location))
{
_baseTabControl.SelectedIndex = i;
}
}
_animationSource = e.Location;
}
private void UpdateTabRects()
{
_tabRects = new List<Rectangle>();
//If there isn't a base tab control, the rects shouldn't be calculated
//If there aren't tab pages in the base tab control, the list should just be empty which has been set already; exit the void
if (_baseTabControl == null || _baseTabControl.TabCount == 0) return;
//Calculate the bounds of each tab header specified in the base tab control
using (var b = new Bitmap(1, 1))
{
using (var g = Graphics.FromImage(b))
{
_tabRects.Add(new Rectangle(SkinManager.FORM_PADDING, 0, TAB_HEADER_PADDING * 2 + (int)g.MeasureString(_baseTabControl.TabPages[0].Text, SkinManager.ROBOTO_MEDIUM_10).Width, Height));
for (int i = 1; i < _baseTabControl.TabPages.Count; i++)
{
_tabRects.Add(new Rectangle(_tabRects[i - 1].Right, 0, TAB_HEADER_PADDING * 2 + (int)g.MeasureString(_baseTabControl.TabPages[i].Text, SkinManager.ROBOTO_MEDIUM_10).Width, Height));
}
}
}
}
}
}