C# 在Gtk窗口中刷新图像,经过一定时间后图像消失
我正在使用C#、.NET4.5和Gtk编写一个简单的应用程序,它捕获屏幕的一部分并将其加载到窗口中的图像上。几秒钟后,图像消失,出现以下错误: Glib CRITICAL**:尝试删除源ID xxxx时未找到它 相关代码: Program.cs:C# 在Gtk窗口中刷新图像,经过一定时间后图像消失,c#,.net,gtk#,C#,.net,Gtk#,我正在使用C#、.NET4.5和Gtk编写一个简单的应用程序,它捕获屏幕的一部分并将其加载到窗口中的图像上。几秒钟后,图像消失,出现以下错误: Glib CRITICAL**:尝试删除源ID xxxx时未找到它 相关代码: Program.cs: using System.Windows.Forms; namespace Dota2Trainer { class MainClass { public static void Main(string[] args)
using System.Windows.Forms;
namespace Dota2Trainer
{
class MainClass
{
public static void Main(string[] args)
{
Gtk.Application.Init();
MiniMapOverlay myWin = new MiniMapOverlay();
myWin.KeepAbove = true;
//myWin.Decorated = false;
myWin.Resize(200, 200);
myWin.ShowAll();
ScreenCapturer screenCap = new ScreenCapturer(30, Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, myWin);
screenCap.Start();
Gtk.Application.Run();
}
}
}
using System;
using System.Drawing;
using System.IO;
using System.Timers;
using Gtk;
namespace Dota2Trainer
{
public partial class MiniMapOverlay : Gtk.Window
{
Gtk.Image image = null;
public MiniMapOverlay() : base(Gtk.WindowType.Toplevel)
{
image = new Gtk.Image();
var buffer = System.IO.File.ReadAllBytes(".\\image0.jpeg");
var pixbuf = new Gdk.Pixbuf(buffer);
image.Pixbuf = pixbuf;
this.Add(image);
this.Build();
}
public void RefreshImage(byte[] buffer)
{
try
{
var pixbuf = new Gdk.Pixbuf(buffer);
image.Pixbuf = pixbuf;
}
catch (Exception exception)
{
Console.WriteLine(exception.Message);
}
}
}
}
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Timers;
namespace Dota2Trainer
{
public delegate void OnSavedImage(byte[] screenCap);
public class ScreenCapturer
{
public System.Timers.Timer aTimer;
int interval= 30000;
readonly int screenWidth;
readonly int screenHeight;
Rectangle bounds;
const double miniMapWidthPercentage = 0.15;
const double miniMapHeightPercentage = 0.25;
Bitmap bitmap;
bool Busy = false;
ImageConverter converter = new ImageConverter();
public OnSavedImage onSaveImage;
public ScreenCapturer(int interval, int screenWidth, int screenHeight, MiniMapOverlay imageHolder)
{
this.screenHeight = screenHeight;
this.screenWidth = screenWidth;
this.interval = interval;
aTimer = new System.Timers.Timer();
aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);
aTimer.Interval = this.interval;
int miniMapWidth = (int)(screenWidth * miniMapWidthPercentage);
int miniMapHeight = (int)(screenHeight * miniMapHeightPercentage);
int miniMapStartWidth = (screenWidth - miniMapWidth);
int miniMapStartHeight = (screenHeight - miniMapHeight);
bounds = new Rectangle(miniMapStartWidth, miniMapStartHeight, miniMapWidth, miniMapHeight);
bitmap = new Bitmap(bounds.Width, bounds.Height);
onSaveImage += imageHolder.RefreshImage;
}
public void Start()
{
aTimer.Enabled = true;
}
public void OnTimedEvent(object sender, ElapsedEventArgs e)
{
try
{
if (Busy)
return;
Busy = true;
using (Graphics g = Graphics.FromImage(bitmap))
{
g.CopyFromScreen(new Point(bounds.Left, bounds.Top), Point.Empty, bounds.Size);
onSaveImage((byte[])converter.ConvertTo(bitmap, typeof(byte[])));
}
Busy = false;
}
catch (Exception exception)
{
Console.WriteLine(exception.Message);
}
}
}
}
MiniMapOverlay.cs:
using System.Windows.Forms;
namespace Dota2Trainer
{
class MainClass
{
public static void Main(string[] args)
{
Gtk.Application.Init();
MiniMapOverlay myWin = new MiniMapOverlay();
myWin.KeepAbove = true;
//myWin.Decorated = false;
myWin.Resize(200, 200);
myWin.ShowAll();
ScreenCapturer screenCap = new ScreenCapturer(30, Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, myWin);
screenCap.Start();
Gtk.Application.Run();
}
}
}
using System;
using System.Drawing;
using System.IO;
using System.Timers;
using Gtk;
namespace Dota2Trainer
{
public partial class MiniMapOverlay : Gtk.Window
{
Gtk.Image image = null;
public MiniMapOverlay() : base(Gtk.WindowType.Toplevel)
{
image = new Gtk.Image();
var buffer = System.IO.File.ReadAllBytes(".\\image0.jpeg");
var pixbuf = new Gdk.Pixbuf(buffer);
image.Pixbuf = pixbuf;
this.Add(image);
this.Build();
}
public void RefreshImage(byte[] buffer)
{
try
{
var pixbuf = new Gdk.Pixbuf(buffer);
image.Pixbuf = pixbuf;
}
catch (Exception exception)
{
Console.WriteLine(exception.Message);
}
}
}
}
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Timers;
namespace Dota2Trainer
{
public delegate void OnSavedImage(byte[] screenCap);
public class ScreenCapturer
{
public System.Timers.Timer aTimer;
int interval= 30000;
readonly int screenWidth;
readonly int screenHeight;
Rectangle bounds;
const double miniMapWidthPercentage = 0.15;
const double miniMapHeightPercentage = 0.25;
Bitmap bitmap;
bool Busy = false;
ImageConverter converter = new ImageConverter();
public OnSavedImage onSaveImage;
public ScreenCapturer(int interval, int screenWidth, int screenHeight, MiniMapOverlay imageHolder)
{
this.screenHeight = screenHeight;
this.screenWidth = screenWidth;
this.interval = interval;
aTimer = new System.Timers.Timer();
aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);
aTimer.Interval = this.interval;
int miniMapWidth = (int)(screenWidth * miniMapWidthPercentage);
int miniMapHeight = (int)(screenHeight * miniMapHeightPercentage);
int miniMapStartWidth = (screenWidth - miniMapWidth);
int miniMapStartHeight = (screenHeight - miniMapHeight);
bounds = new Rectangle(miniMapStartWidth, miniMapStartHeight, miniMapWidth, miniMapHeight);
bitmap = new Bitmap(bounds.Width, bounds.Height);
onSaveImage += imageHolder.RefreshImage;
}
public void Start()
{
aTimer.Enabled = true;
}
public void OnTimedEvent(object sender, ElapsedEventArgs e)
{
try
{
if (Busy)
return;
Busy = true;
using (Graphics g = Graphics.FromImage(bitmap))
{
g.CopyFromScreen(new Point(bounds.Left, bounds.Top), Point.Empty, bounds.Size);
onSaveImage((byte[])converter.ConvertTo(bitmap, typeof(byte[])));
}
Busy = false;
}
catch (Exception exception)
{
Console.WriteLine(exception.Message);
}
}
}
}
ScreenCapturer.cs:
using System.Windows.Forms;
namespace Dota2Trainer
{
class MainClass
{
public static void Main(string[] args)
{
Gtk.Application.Init();
MiniMapOverlay myWin = new MiniMapOverlay();
myWin.KeepAbove = true;
//myWin.Decorated = false;
myWin.Resize(200, 200);
myWin.ShowAll();
ScreenCapturer screenCap = new ScreenCapturer(30, Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, myWin);
screenCap.Start();
Gtk.Application.Run();
}
}
}
using System;
using System.Drawing;
using System.IO;
using System.Timers;
using Gtk;
namespace Dota2Trainer
{
public partial class MiniMapOverlay : Gtk.Window
{
Gtk.Image image = null;
public MiniMapOverlay() : base(Gtk.WindowType.Toplevel)
{
image = new Gtk.Image();
var buffer = System.IO.File.ReadAllBytes(".\\image0.jpeg");
var pixbuf = new Gdk.Pixbuf(buffer);
image.Pixbuf = pixbuf;
this.Add(image);
this.Build();
}
public void RefreshImage(byte[] buffer)
{
try
{
var pixbuf = new Gdk.Pixbuf(buffer);
image.Pixbuf = pixbuf;
}
catch (Exception exception)
{
Console.WriteLine(exception.Message);
}
}
}
}
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Timers;
namespace Dota2Trainer
{
public delegate void OnSavedImage(byte[] screenCap);
public class ScreenCapturer
{
public System.Timers.Timer aTimer;
int interval= 30000;
readonly int screenWidth;
readonly int screenHeight;
Rectangle bounds;
const double miniMapWidthPercentage = 0.15;
const double miniMapHeightPercentage = 0.25;
Bitmap bitmap;
bool Busy = false;
ImageConverter converter = new ImageConverter();
public OnSavedImage onSaveImage;
public ScreenCapturer(int interval, int screenWidth, int screenHeight, MiniMapOverlay imageHolder)
{
this.screenHeight = screenHeight;
this.screenWidth = screenWidth;
this.interval = interval;
aTimer = new System.Timers.Timer();
aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);
aTimer.Interval = this.interval;
int miniMapWidth = (int)(screenWidth * miniMapWidthPercentage);
int miniMapHeight = (int)(screenHeight * miniMapHeightPercentage);
int miniMapStartWidth = (screenWidth - miniMapWidth);
int miniMapStartHeight = (screenHeight - miniMapHeight);
bounds = new Rectangle(miniMapStartWidth, miniMapStartHeight, miniMapWidth, miniMapHeight);
bitmap = new Bitmap(bounds.Width, bounds.Height);
onSaveImage += imageHolder.RefreshImage;
}
public void Start()
{
aTimer.Enabled = true;
}
public void OnTimedEvent(object sender, ElapsedEventArgs e)
{
try
{
if (Busy)
return;
Busy = true;
using (Graphics g = Graphics.FromImage(bitmap))
{
g.CopyFromScreen(new Point(bounds.Left, bounds.Top), Point.Empty, bounds.Size);
onSaveImage((byte[])converter.ConvertTo(bitmap, typeof(byte[])));
}
Busy = false;
}
catch (Exception exception)
{
Console.WriteLine(exception.Message);
}
}
}
}
完整的源代码可以在这里找到:
它的工作原理是创建一个计时器,在一定时间后运行Screencapturer类的OnTimedEvent()方法,该类有一个委托,该委托将运行MiniMapOverlay RefreshImage()方法。这段代码目前令人震惊,但我只是想在重构之前建立一个粗略的、现成的版本并运行它
我已经寻找了很久,关于为什么会发生这种情况,有什么建议吗?你应该使用
Glib.Timeout
而不是System.Timers
。System.Timers
可能存在线程问题,并且计时器事件发生在与GTK应用程序不同的线程上Glib.Timeout
在GTK主应用程序循环中以一定间隔对事件进行排队,并在同一线程中运行。但是,它不适用于时间敏感函数,因为应用程序循环正在处理其他事件,例如鼠标单击。我见过大约半秒到一秒的延迟,但那是在一台旧计算机上调试时发生的。这似乎不是你的应用程序的问题;仅供将来参考。另外,Glib.Timeout
将继续调用更新事件,直到返回false
uint timerId;
public void Start(uint interval)
{
timerId = GLib.Timeout.Add (interval, OnUpdateTimer);
}
protected bool OnUpdateTimer ()
{
try
{
if (Busy)
return;
Busy = true;
using (Graphics g = Graphics.FromImage(bitmap))
{
g.CopyFromScreen(new Point(bounds.Left, bounds.Top), Point.Empty, bounds.Size);
onSaveImage((byte[])converter.ConvertTo(bitmap, typeof(byte[])));
}
Busy = false;
}
catch (Exception exception)
{
Console.WriteLine(exception.Message);
}
return true;
}
您应该使用
Glib.Timeout
而不是System.timer
。System.Timers
可能存在线程问题,并且计时器事件发生在与GTK应用程序不同的线程上Glib.Timeout
在GTK主应用程序循环中以一定间隔对事件进行排队,并在同一线程中运行。但是,它不适用于时间敏感函数,因为应用程序循环正在处理其他事件,例如鼠标单击。我见过大约半秒到一秒的延迟,但那是在一台旧计算机上调试时发生的。这似乎不是你的应用程序的问题;仅供将来参考。另外,Glib.Timeout
将继续调用更新事件,直到返回false
uint timerId;
public void Start(uint interval)
{
timerId = GLib.Timeout.Add (interval, OnUpdateTimer);
}
protected bool OnUpdateTimer ()
{
try
{
if (Busy)
return;
Busy = true;
using (Graphics g = Graphics.FromImage(bitmap))
{
g.CopyFromScreen(new Point(bounds.Left, bounds.Top), Point.Empty, bounds.Size);
onSaveImage((byte[])converter.ConvertTo(bitmap, typeof(byte[])));
}
Busy = false;
}
catch (Exception exception)
{
Console.WriteLine(exception.Message);
}
return true;
}
我不认为有人会想解析你的整个项目,请发布你的源代码中与此问题相关的部分。项目只包含3个小类,我只是加入了它们的源代码,以消除访问git页面的需要。我不认为有人会想解析你的整个项目,请发布与此问题相关的源代码的相关部分。Project只包含3个小类,我刚刚加入了它们的源代码,以消除访问git页面的需要。我想这可能与线程有关。谢谢只是一个小提示,“if(Busy)return;”部分需要返回bool。我想这可能与线程有关。谢谢请注意,“if(Busy)return;”部分需要返回bool。