221 lines
8.5 KiB
C#
221 lines
8.5 KiB
C#
using System;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Windows.Forms;
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namespace WordAddIn
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{
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/// <summary>
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/// 加载动画窗体。
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/// 功能描述：
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/// 1. 在执行耗时操作（如 AI 生成）时显示，阻断用户界面。
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/// 2. 使用 GDI+ 自定义绘制旋转动画 (Spinner)。
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/// 3. 支持跨线程安全关闭。
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/// </summary>
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public class LoadingForm : Form
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{
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private System.Windows.Forms.Label lblMessage;
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private System.Windows.Forms.RichTextBox txtProgress;
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private System.Windows.Forms.Timer animationTimer;
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private System.ComponentModel.IContainer components;
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private int _spinnerAngle = 0;
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private const int SPINNER_SIZE = 60;
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// 现代化配色
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private readonly Color _primaryColor = Color.FromArgb(43, 87, 154); // Word Blue
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private readonly Color _backgroundColor = Color.White;
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private readonly Color _borderColor = Color.FromArgb(100, 100, 100);
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/// <summary>
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/// 构造函数。
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/// </summary>
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/// <param name="message">加载时显示的提示文字</param>
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public LoadingForm(string message = "AI 正在思考中...")
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{
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InitializeComponent();
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lblMessage.Text = message;
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// 开启双缓冲以减少闪烁
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this.SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint | ControlStyles.DoubleBuffer, true);
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this.UpdateStyles();
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}
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/// <summary>
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/// 初始化窗体组件。
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/// </summary>
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private void InitializeComponent()
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{
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this.components = new System.ComponentModel.Container();
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this.lblMessage = new System.Windows.Forms.Label();
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this.txtProgress = new System.Windows.Forms.RichTextBox();
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this.animationTimer = new System.Windows.Forms.Timer(this.components);
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this.SuspendLayout();
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//
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// lblMessage
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//
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this.lblMessage.BackColor = System.Drawing.Color.Transparent;
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this.lblMessage.Dock = System.Windows.Forms.DockStyle.None;
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this.lblMessage.Font = new System.Drawing.Font("Microsoft YaHei UI", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
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this.lblMessage.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(64)))), ((int)(((byte)(64)))), ((int)(((byte)(64)))));
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this.lblMessage.Location = new System.Drawing.Point(0, 150);
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this.lblMessage.Name = "lblMessage";
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this.lblMessage.Size = new System.Drawing.Size(500, 30);
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this.lblMessage.TabIndex = 0;
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this.lblMessage.Text = "AI 正在思考中...";
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this.lblMessage.TextAlign = System.Drawing.ContentAlignment.TopCenter;
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//
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// txtProgress
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//
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this.txtProgress.BackColor = System.Drawing.Color.White;
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this.txtProgress.BorderStyle = System.Windows.Forms.BorderStyle.None;
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this.txtProgress.Font = new System.Drawing.Font("Microsoft YaHei UI", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
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this.txtProgress.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(64)))), ((int)(((byte)(64)))), ((int)(((byte)(64)))));
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this.txtProgress.Location = new System.Drawing.Point(40, 190);
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this.txtProgress.Name = "txtProgress";
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this.txtProgress.ReadOnly = true;
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this.txtProgress.ScrollBars = System.Windows.Forms.RichTextBoxScrollBars.Vertical;
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this.txtProgress.Size = new System.Drawing.Size(420, 190);
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this.txtProgress.TabIndex = 1;
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this.txtProgress.Text = "";
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//
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// animationTimer
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//
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this.animationTimer.Enabled = true;
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this.animationTimer.Interval = 30;
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this.animationTimer.Tick += new System.EventHandler(this.AnimationTimer_Tick);
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//
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// LoadingForm
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//
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// this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
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this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Dpi;
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this.BackColor = System.Drawing.Color.White;
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this.ClientSize = new System.Drawing.Size(500, 400);
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this.Controls.Add(this.txtProgress);
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this.Controls.Add(this.lblMessage);
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this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
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this.Name = "LoadingForm";
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this.ShowInTaskbar = false;
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this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
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this.Text = "AI助手";
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this.TopMost = true;
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this.ResumeLayout(false);
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}
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/// <summary>
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/// 动画定时器触发事件。更新旋转角度并重绘。
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/// </summary>
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private void AnimationTimer_Tick(object sender, EventArgs e)
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{
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_spinnerAngle = (_spinnerAngle + 10) % 360;
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this.Invalidate(); // 触发重绘
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}
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/// <summary>
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/// 重写绘制事件，自定义绘制加载动画。
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/// </summary>
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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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Graphics g = e.Graphics;
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g.SmoothingMode = SmoothingMode.HighQuality;
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// 1. 绘制边框
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using (Pen borderPen = new Pen(_borderColor, 2))
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{
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g.DrawRectangle(borderPen, 0, 0, this.Width - 1, this.Height - 1);
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}
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// 2. 绘制 Spinner (中心位置)
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int centerX = this.Width / 2;
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int centerY = 100; // 居中
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g.TranslateTransform(centerX, centerY);
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g.RotateTransform(_spinnerAngle);
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// 绘制一个渐变的圆环或一串圆点
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// 这里我们画 8 个圆点，透明度渐变
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int dotCount = 10;
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int radius = SPINNER_SIZE / 2;
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int dotSize = 6;
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for (int i = 0; i < dotCount; i++)
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{
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// 计算每个点的透明度 (0-255)
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// 使得看起来像是有拖尾
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int alpha = 255 * (i + 1) / dotCount;
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using (Brush brush = new SolidBrush(Color.FromArgb(alpha, _primaryColor)))
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{
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// 保存当前状态
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var state = g.Save();
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// 旋转到对应角度
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float angle = 360f / dotCount * i;
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g.RotateTransform(angle);
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// 在半径处画圆点
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g.FillEllipse(brush, radius - dotSize, -dotSize / 2, dotSize, dotSize);
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// 恢复状态
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g.Restore(state);
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}
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}
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g.ResetTransform();
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}
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/// <summary>
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/// 线程安全的关闭方法。
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/// 允许从非 UI 线程调用。
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/// </summary>
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public void UpdateProgress(string content)
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{
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if (this.IsDisposed) return;
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if (this.InvokeRequired)
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{
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this.Invoke(new Action<string>(UpdateProgress), content);
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}
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else
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{
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this.txtProgress.AppendText(content);
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this.txtProgress.ScrollToCaret();
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}
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}
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public void CloseSafe()
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{
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if (this.IsDisposed) return;
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if (this.InvokeRequired)
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{
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this.Invoke(new Action(CloseSafe));
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}
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else
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{
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animationTimer.Stop();
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this.Close();
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}
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}
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/// <summary>
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/// 支持鼠标拖动无边框窗体。
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/// </summary>
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protected override void OnMouseDown(MouseEventArgs e)
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{
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base.OnMouseDown(e);
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if (e.Button == MouseButtons.Left)
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{
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ReleaseCapture();
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SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
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}
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}
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[System.Runtime.InteropServices.DllImport("user32.dll")]
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public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
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[System.Runtime.InteropServices.DllImport("user32.dll")]
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public static extern bool ReleaseCapture();
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public const int WM_NCLBUTTONDOWN = 0xA1;
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public const int HT_CAPTION = 0x2;
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}
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}
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