Initial commit: .NET MAUI Linux Platform
Complete Linux platform implementation for .NET MAUI with:
- 35+ Skia-rendered controls (Button, Label, Entry, CarouselView, etc.)
- Platform services (Clipboard, FilePicker, Notifications, DragDrop, etc.)
- Accessibility support (AT-SPI2, High Contrast)
- HiDPI and Input Method support
- 216 unit tests
- CI/CD workflows
- Project templates
- Documentation
🤖 Generated with Claude Code
This commit is contained in:
logikonline
246
Views/SkiaButton.cs
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246
Views/SkiaButton.cs
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// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT license.
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using SkiaSharp;
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using Microsoft.Maui.Platform.Linux.Rendering;
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namespace Microsoft.Maui.Platform;
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/// <summary>
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/// Skia-rendered button control.
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/// </summary>
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public class SkiaButton : SkiaView
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{
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public string Text { get; set; } = "";
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public SKColor TextColor { get; set; } = SKColors.White;
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public new SKColor BackgroundColor { get; set; } = new SKColor(0x21, 0x96, 0xF3); // Material Blue
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public SKColor PressedBackgroundColor { get; set; } = new SKColor(0x19, 0x76, 0xD2);
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public SKColor DisabledBackgroundColor { get; set; } = new SKColor(0xBD, 0xBD, 0xBD);
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public SKColor HoveredBackgroundColor { get; set; } = new SKColor(0x42, 0xA5, 0xF5);
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public SKColor BorderColor { get; set; } = SKColors.Transparent;
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public string FontFamily { get; set; } = "Sans";
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public float FontSize { get; set; } = 14;
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public bool IsBold { get; set; }
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public bool IsItalic { get; set; }
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public float CharacterSpacing { get; set; }
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public float CornerRadius { get; set; } = 4;
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public float BorderWidth { get; set; } = 0;
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public SKRect Padding { get; set; } = new SKRect(16, 8, 16, 8);
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public bool IsPressed { get; private set; }
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public bool IsHovered { get; private set; }
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private bool _focusFromKeyboard;
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public event EventHandler? Clicked;
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public event EventHandler? Pressed;
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public event EventHandler? Released;
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public SkiaButton()
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{
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IsFocusable = true;
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}
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protected override void OnDraw(SKCanvas canvas, SKRect bounds)
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{
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// Determine background color based on state
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var bgColor = !IsEnabled ? DisabledBackgroundColor
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: IsPressed ? PressedBackgroundColor
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: IsHovered ? HoveredBackgroundColor
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: BackgroundColor;
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// Draw shadow (for elevation effect)
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if (IsEnabled && !IsPressed)
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{
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DrawShadow(canvas, bounds);
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}
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// Draw background with rounded corners
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using var bgPaint = new SKPaint
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{
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Color = bgColor,
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IsAntialias = true,
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Style = SKPaintStyle.Fill
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};
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var rect = new SKRoundRect(bounds, CornerRadius);
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canvas.DrawRoundRect(rect, bgPaint);
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// Draw border
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if (BorderWidth > 0 && BorderColor != SKColors.Transparent)
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{
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using var borderPaint = new SKPaint
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{
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Color = BorderColor,
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IsAntialias = true,
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Style = SKPaintStyle.Stroke,
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StrokeWidth = BorderWidth
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};
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canvas.DrawRoundRect(rect, borderPaint);
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}
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// Draw focus ring only for keyboard focus
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if (IsFocused && _focusFromKeyboard)
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{
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using var focusPaint = new SKPaint
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{
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Color = new SKColor(0x21, 0x96, 0xF3, 0x80),
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IsAntialias = true,
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Style = SKPaintStyle.Stroke,
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StrokeWidth = 2
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};
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var focusRect = new SKRoundRect(bounds, CornerRadius + 2);
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focusRect.Inflate(2, 2);
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canvas.DrawRoundRect(focusRect, focusPaint);
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}
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// Draw text
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if (!string.IsNullOrEmpty(Text))
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{
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var fontStyle = new SKFontStyle(
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IsBold ? SKFontStyleWeight.Bold : SKFontStyleWeight.Normal,
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SKFontStyleWidth.Normal,
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IsItalic ? SKFontStyleSlant.Italic : SKFontStyleSlant.Upright);
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var typeface = SkiaRenderingEngine.Current?.ResourceCache.GetTypeface(FontFamily, fontStyle)
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?? SKTypeface.Default;
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using var font = new SKFont(typeface, FontSize);
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using var paint = new SKPaint(font)
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{
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Color = IsEnabled ? TextColor : TextColor.WithAlpha(128),
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IsAntialias = true
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};
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// Measure text
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var textBounds = new SKRect();
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paint.MeasureText(Text, ref textBounds);
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// Center text
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var x = bounds.MidX - textBounds.MidX;
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var y = bounds.MidY - textBounds.MidY;
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canvas.DrawText(Text, x, y, paint);
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}
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}
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private void DrawShadow(SKCanvas canvas, SKRect bounds)
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{
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using var shadowPaint = new SKPaint
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{
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Color = new SKColor(0, 0, 0, 50),
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IsAntialias = true,
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MaskFilter = SKMaskFilter.CreateBlur(SKBlurStyle.Normal, 4)
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};
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var shadowRect = new SKRect(
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bounds.Left + 2,
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bounds.Top + 4,
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bounds.Right + 2,
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bounds.Bottom + 4);
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var roundRect = new SKRoundRect(shadowRect, CornerRadius);
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canvas.DrawRoundRect(roundRect, shadowPaint);
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}
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public override void OnPointerEntered(PointerEventArgs e)
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{
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if (!IsEnabled) return;
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IsHovered = true;
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Invalidate();
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}
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public override void OnPointerExited(PointerEventArgs e)
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{
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IsHovered = false;
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if (IsPressed)
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{
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IsPressed = false;
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}
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Invalidate();
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}
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public override void OnPointerPressed(PointerEventArgs e)
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{
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if (!IsEnabled) return;
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IsPressed = true;
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_focusFromKeyboard = false;
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Invalidate();
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Pressed?.Invoke(this, EventArgs.Empty);
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}
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public override void OnPointerReleased(PointerEventArgs e)
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{
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if (!IsEnabled) return;
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var wasPressed = IsPressed;
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IsPressed = false;
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Invalidate();
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Released?.Invoke(this, EventArgs.Empty);
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// Fire click if released within bounds
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if (wasPressed && Bounds.Contains(new SKPoint(e.X, e.Y)))
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{
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Clicked?.Invoke(this, EventArgs.Empty);
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}
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}
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public override void OnKeyDown(KeyEventArgs e)
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{
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if (!IsEnabled) return;
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// Activate on Enter or Space
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if (e.Key == Key.Enter || e.Key == Key.Space)
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{
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IsPressed = true;
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_focusFromKeyboard = true;
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Invalidate();
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Pressed?.Invoke(this, EventArgs.Empty);
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e.Handled = true;
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}
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}
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public override void OnKeyUp(KeyEventArgs e)
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{
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if (!IsEnabled) return;
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if (e.Key == Key.Enter || e.Key == Key.Space)
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{
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if (IsPressed)
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{
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IsPressed = false;
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Invalidate();
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Released?.Invoke(this, EventArgs.Empty);
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Clicked?.Invoke(this, EventArgs.Empty);
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}
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e.Handled = true;
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}
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}
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protected override SKSize MeasureOverride(SKSize availableSize)
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{
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if (string.IsNullOrEmpty(Text))
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{
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return new SKSize(
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Padding.Left + Padding.Right + 40, // Minimum width
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Padding.Top + Padding.Bottom + FontSize);
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}
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var fontStyle = new SKFontStyle(
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IsBold ? SKFontStyleWeight.Bold : SKFontStyleWeight.Normal,
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SKFontStyleWidth.Normal,
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IsItalic ? SKFontStyleSlant.Italic : SKFontStyleSlant.Upright);
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var typeface = SkiaRenderingEngine.Current?.ResourceCache.GetTypeface(FontFamily, fontStyle)
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?? SKTypeface.Default;
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using var font = new SKFont(typeface, FontSize);
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using var paint = new SKPaint(font);
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var textBounds = new SKRect();
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paint.MeasureText(Text, ref textBounds);
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return new SKSize(
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textBounds.Width + Padding.Left + Padding.Right,
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textBounds.Height + Padding.Top + Padding.Bottom);
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}
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}
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