wehub-resource-sync
124 lines
3.9 KiB
C#
124 lines
3.9 KiB
C#
// Copyright 2025 Takuto Nakamura
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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using System.ComponentModel;
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using System.Drawing.Drawing2D;
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namespace RunCat365
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{
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internal sealed class FrameAnimationView : Control
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{
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private readonly System.Threading.Timer timer;
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private IReadOnlyList<Bitmap> frames = [];
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private int currentFrame = 0;
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private int intervalMs = 100;
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private volatile bool running = false;
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internal FrameAnimationView()
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{
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SetStyle(
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ControlStyles.AllPaintingInWmPaint |
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ControlStyles.OptimizedDoubleBuffer |
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ControlStyles.UserPaint |
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ControlStyles.ResizeRedraw,
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true);
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timer = new System.Threading.Timer(OnTimerTick, null, Timeout.Infinite, Timeout.Infinite);
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}
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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internal int FrameIntervalMs
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{
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get => intervalMs;
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set => intervalMs = Math.Max(1, value);
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}
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internal void SetFrames(IReadOnlyList<Bitmap> newFrames)
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{
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frames = newFrames;
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currentFrame = 0;
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Invalidate();
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if (frames.Count > 1)
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{
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running = true;
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timer.Change(intervalMs, Timeout.Infinite);
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}
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else
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{
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running = false;
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timer.Change(Timeout.Infinite, Timeout.Infinite);
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}
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}
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internal void Clear()
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{
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running = false;
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timer.Change(Timeout.Infinite, Timeout.Infinite);
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frames = [];
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currentFrame = 0;
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Invalidate();
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}
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private void OnTimerTick(object? state)
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{
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if (!running) return;
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if (IsDisposed || !IsHandleCreated) return;
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try
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{
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BeginInvoke(AdvanceFrame);
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}
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catch (Exception ex) when (ex is InvalidOperationException or ObjectDisposedException)
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{
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return;
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}
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if (running) timer.Change(intervalMs, Timeout.Infinite);
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}
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private void AdvanceFrame()
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{
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if (!running || frames.Count < 2) return;
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currentFrame = (currentFrame + 1) % frames.Count;
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Invalidate();
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}
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protected override void OnPaint(PaintEventArgs e)
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{
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e.Graphics.Clear(BackColor);
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if (frames.Count == 0 || currentFrame >= frames.Count) return;
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var frame = frames[currentFrame];
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e.Graphics.InterpolationMode = InterpolationMode.NearestNeighbor;
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e.Graphics.PixelOffsetMode = PixelOffsetMode.Half;
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var scale = Math.Min(
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(float)ClientSize.Width / frame.Width,
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(float)ClientSize.Height / frame.Height);
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var width = (int)(frame.Width * scale);
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var height = (int)(frame.Height * scale);
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var x = (ClientSize.Width - width) / 2;
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var y = (ClientSize.Height - height) / 2;
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e.Graphics.DrawImage(frame, x, y, width, height);
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}
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protected override void Dispose(bool disposing)
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{
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if (disposing)
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{
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running = false;
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timer.Dispose();
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}
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base.Dispose(disposing);
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}
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}
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}
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