I am trying to make a very simple logic game. The idea is to see a matrix with a certain number of colored squares(buttons) then to hide them and the player has to click the colored squares. So I need a 2 second delay between the painting the squares/buttons and returning the original colors. All the code is implemented in a button_click event.
private void button10_Click(object sender, EventArgs e)
{
int[,] tempMatrix = new int[3, 3];
tempMatrix = MakeMatrix();
tempMatrix = SetDifferentValues(tempMatrix);
SetButtonColor(tempMatrix, 8);
if (true)
{
Thread.Sleep(1000);
// ReturnButtonsDefaultColor();
}
ReturnButtonsDefaultColor();
Thread.Sleep(2000);
tempMatrix = ResetTempMatrix(tempMatrix);
}
This is the whole code, but what I need is to have some delay between calling SetButtonColor() and ReturnButtonsDefaultColor(). All my experiments with Thread.Sleep() meet no success till now. I get a delay at some point, but the colored squares/buttons are never shown.
You don't see the buttons change color because the Sleep call prevents messages from being processed.
Probably the easiest way to handle this is with a timer. Initialize the timer with a 2 second delay and make sure that it's disabled by default. Then, your button click code enables the timer. Like this:
private void button10_Click(object sender, EventArgs e)
{
// do stuff here
SetButtonColor(...);
timer1.Enabled = true; // enables the timer. The Elapsed event will occur in 2 seconds
}
And your timer's Elapsed event handler:
private void timer1_TIck(object sender, EventArgs e)
{
timer1.Enabled = false;
ResetButtonsDefaultColor();
}
You can always use TPL, its the simplest solution, because you don't need to handle thread contexts or fragment your code.
private async void button10_Click(object sender, EventArgs e)
{
int[,] tempMatrix = new int[3, 3];
tempMatrix = MakeMatrix();
tempMatrix = SetDifferentValues(tempMatrix);
SetButtonColor(tempMatrix, 8);
if (true)
{
await Task.Delay(2000);
// ReturnButtonsDefaultColor();
}
ReturnButtonsDefaultColor();
await Task.Delay(2000);
tempMatrix = ResetTempMatrix(tempMatrix);
}
Use a Timer. Instead of your Thread.Sleep Start() the timer, in the tick event call ReturnButtonsDefaultColor(). You could use a second timer instead of the second Thread.Sleep or save some sort of state and use it in the tick event.
You can use Tasks:
private void button10_Click(object sender, EventArgs e)
{
int[,] tempMatrix = new int[3, 3];
tempMatrix = MakeMatrix();
tempMatrix = SetDifferentValues(tempMatrix);
SetButtonColor(tempMatrix, 8);
Task.Factory.StartNew(
() =>
{
if (true)
{
Thread.Sleep(1000);
// ReturnButtonsDefaultColor();
}
ReturnButtonsDefaultColor(); //Need to dispatch that to the UI thread
Thread.Sleep(2000);
tempMatrix = ResetTempMatrix(tempMatrix); //Probably that as well
});
}
Dispatching in WPF is different from Winforms, it should be easy enough to google ;)
Related
I have a label pop up letting the user when they click the copy button that it's been copied using a label in the bottom right on the app. But I want the text to go away after 2 or so seconds. Then come back if they click copy again, this is my copy buttons code:
private void copyBtn_Click(object sender, EventArgs e)
{
labelCopied.Text = "Copied to Clipboard!";
Clipboard.SetText(btcTxtBox.Text);
SystemSounds.Hand.Play();
}
I do know labelCopied.Text.Remove(0); would clear the label but I cannot figure out how to implement it using a timer
Use a Timer for this:
private void copyBtn_Click(object sender, EventArgs e)
{
labelCopied.Text = "Copied to Clipboard!";
Clipboard.SetText(btcTxtBox.Text);
SystemSounds.Hand.Play();
Timer t = new Timer();
t.Interval = 2000; //2000 milliseconds = 2 seconds
t.Tick += (a,b) =>
{
labelCopied.Text = string.Empty;
t.Stop();
};
t.Start();
}
EDIT
Task.Delay uses a Timer internally. So if you don't mind a minimal performance overhead, Task.Delay is good to go. Additionally Task.Delay is more portable since Timer is WinForms specific (In WPF you would use DispatcherTimer)
private async void copyBtn_Click(object sender, EventArgs e)
{
labelCopied.Text = "Copied to Clipboard!";
Clipboard.SetText(btcTxtBox.Text);
SystemSounds.Hand.Play();
await Task.Delay(2000);
labelCopied.Text = "";
}
Assuming WinForms, use async/await with Task.Delay(), like this:
private async void copyBtn_Click(object sender, EventArgs e)
{
labelCopied.Text = "Copied to Clipboard!";
Clipboard.SetText(btcTxtBox.Text);
SystemSounds.Hand.Play();
await Task.Delay(2000);
labelCopied.Text = "";
}
I couldn't find the answer to this question anywhere. Is there any command that displays a picture box for a specified amount of milliseconds? I know I could do thread.sleep or task.delay. But is there an alternative to these? Something that replaces:
picturebox1.visible = true;
thread.sleep(1000);
picturebox1.visible = false;
Thanks alot !
You can use Thread.Sleep, Task.Delay or you can use a Timer which is described in other answers.
Probably you don't like to use Task.Delay or Thread.Sleep because you think it makes your program to go to a blocking and freezing state. You can use Thread.Sleep in a different thread to prevent freezing the form:
this.pictureBox1.Visible = true;
Task.Run(() =>
{
Thread.Sleep(5000);
this.Invoke(new Action(() =>
{
this.pictureBox1.Visible = false;
}));
});
//Other codes which you put here, will not wait and will run immediately.
//Then after 5 seconds the picture box will be invisible again.
private void Form1_Load(object sender, EventArgs e)
{
picturebox1.visible = true;
Timer MyTimer = new Timer();
MyTimer.Interval = (1000);
MyTimer.Tick += new EventHandler(MyTimer_Tick);
MyTimer.Start();
}
private void MyTimer_Tick(object sender, EventArgs e)
{
picturebox1.visible = false;
(sender as Timer).Stop();
}
You can also do this using GDI+. Instead of using PictureBox, simply add a handler for your form's Paint event. Inside it, draw your image using e.Graphics.DrawImage() method. Use a global bool variable that you should set to false after 1 second (or whatever your requirement is). In the Paint event, check this variable before drawing your image. Something like this:
bool DrawImage = true;
private void Form1_Load(object sender, EventArgs e)
{
Task.Delay(1000).ContinueWith((t) =>
{
DrawImage = false;
Invalidate();
});
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
if (DrawImage)
e.Graphics.DrawImage(YOUR_IMAGE_HERE, 0, 0);
}
I have a Windows Forms App written in C#. The idea is, that it draws a chart for 10 numbers after clicking a button. This works fine. I click the button, and I get a nice chart. However I also want to include a sort of "auto refresh" mode, where the chart is refreshed every few seconds. This would be enabled via Checkbox. Here's my code:
private void chartButton_Click(object sender, EventArgs e) //draw a chart after the button is clicked
{
Random rdn1 = new Random();
int value;
foreach (var series in ekran.Series) //clear previous values
{
series.Points.Clear();
}
for (int i = 0; i < 10; i++) //draw a chart from ten new values
{
value = rdn1.Next(0, 10); //for testing purpouses the value will be a random number a random number
ekran.Series["seria1"].Points.AddXY(i, value);
}
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
while(checkBox1.Checked) //click the chartButton every one second, when the checkbox is checked
{
//rysuj.PerformClick();
chartButton.PerformClick();
Thread.Sleep(1000);
}
}
And now for my problem. When I check the Checkbox, I will not get a chart until it finishes every iteration of the while loop. Since it's an infinite loop, I will never get my chart. If I rewrite the code to make only five iterations when the Checkbox is checked, I only get the chart for the fifth one (and after five seconds, as to be expected).
So my question is: how can I force this to draw a chart every time the button is clicked via chartButton.PerformClick()? When I click the button manually, everything works fine, it's just when I try to do it automatically, I get my problem.
EDIT
First of all,thank you for the replies. However, I'm still experiencing the same problem when using a timer. This is how my code looks now:
namespace ChartTest
{
public partial class Form1 : Form
{
System.Windows.Forms.Timer timer = new System.Windows.Forms.Timer();
public Form1()
{
InitializeComponent();
timer.Tick += new EventHandler(timer_Tick);
timer.Interval = 1000;
}
void timer_Tick(object sender, EventArgs e)
{
timer.Enabled = false;
chartButton.PerformClick();
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
while (checkBox1.Checked)
{
timer.Enabled = true; // Enable the timer
timer.Start(); // Start the timer
}
}
private void chartButton_Click(object sender, EventArgs e) //draw a chart after the button is clicked
{
Random rdn1 = new Random();
int value;
ekran.Series.Clear();
var series2 = new System.Windows.Forms.DataVisualization.Charting.Series
{
Name = "Series2",
Color = System.Drawing.Color.Green,
IsVisibleInLegend = false,
IsXValueIndexed = true,
ChartType = SeriesChartType.Line
};
this.ekran.Series.Add(series2);
for (int i = 0; i < 100; i++)
{
value = rdn1.Next(0, 10);
series2.Points.AddXY(i, value);
}
}
}
}
Sorry for being a total noob, but I have no idea, what am I doing wrong this time.
This is exactly what a Timer is for. Have the checkbox start/stop or enable/disable the timer, and handle the Timer.Tick event to redraw your chart. In your case, the event handler could simply call chartButton.PerformClick(), or insert whatever code the PerformClick() does.
ETA: If the chart refresh is not instant, you will probably want to push it off to a separate thread. If it's instant, there's not really any need to deal with the threading though.
I would go the route of using a thread with combination of checkbox's checkChange() event. Essentially this will allow your application to keep running while the update code will execute periodically. The refresh is determined by the sleep time, not your manual click or any other value.. Example below on how I to do this:
Thread refreshThread = null;
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (refreshThread == null) //No thread running, assume it starts this way
{
refreshThread = new Thread(chartRefresh);
refreshThread.Start();
}
else //Thread is running, must terminate
{
refreshThread.Abort();
refreshThread = null;
}
}
private void chartRefresh()
{
while (true)
{
//code to refresh chart
Thread.Sleep(10000);
}
}
Could any one help me to stop my timer in windows form C3 application? I added timer in form using designer and interval is set as 1000; I would like to do some actions after 5 seconds of waiting after button click. Please check the code and advise me. Problem now is I get MessageBox2 infinitely and never gets the timer stop.
static int count;
public Form1()
{
InitializeComponent();
timer1.Tick += timer1_Tick;
}
public void button1_Click(object sender, EventArgs e)
{
timer1.Enabled = true;
while(count>5)
{
....dosome actions...
}
}
private void timer1_Tick(object sender, EventArgs e)
{
count1++;
MessageBox.Show("Messagebox2");
if (count1 == 5)
{
//timer1.Enabled = false; timer1.Stop();
((System.Timers.Timer)sender).Enabled = false;
MessageBox.Show("stopping timer");
}
}
I would render the count useless and just use the timer 1 interval property and put your actions in the timer1_Tick event.
public void button1_Click(object sender, EventArgs e)
{
timer1.Interval = 5000;
timer1.Enabled = true;
}
private void timer1_Tick(object sender, EventArgs e)
{
timer1.Enabled = false;
MessageBox.Show("stopping timer");
// Your other actions here
}
You are incrementing count1 and checking count.
while(count1 > 5)
{
...dosome actions...
}
Which Timer do you use? Because C# supports class Timer from two different namespaces. One is from Forms, the other is from System.Timers. I would suggest you to use the other one - System.Timers.Timer.
Timer t = new Timer(20000); // created with 20seconds
t.Enabled = true; // enables firing Elapsed event
t.Elapsed += (s, e) => {
\\do stuff
};
t.Start();
In this short code you can see how the timer is created and enabled. By registering to the Elapsed event you explicitly say what to do after the time elapses. and this is done just once. Of course, there are some changes needed in case user clicks button before your limit is reached. But this is highly dependent on behavior of the action you demand.
I have a progress bar and want to fill it in using a separate thread, because the main thread is put to sleep for a few seconds in a loop. I'm using a timer so that the progress bar fills up over a certain amount of time.
Thread creation:
private void PlayButton_Click(object sender, EventArgs e)
{
progressBar1.Value = 0;
int playTime = getPlayTime();
int progressInterval = playTime / 100;
Thread progressThread = new Thread(barfiller=>fillBar(progressInterval));
progressThread.Start();
//Loops through the collection and plays each note one after the other
foreach (MusicNote music in this.staff.Notes)
{
music.Play(music.Dur);
Thread.Sleep(music.getInterval(music.Dur));
}
progressThread.Abort();
}
As is, nothing happens to the progress bar, if however I call fillbar() within the main thread, it works BUT it fills after the for loop is complete and not before/during the for loop even though I call fillbar() before the loop.
Thread methods:
private void fillBar(int progressInterval)
{
progressTimer = new System.Windows.Forms.Timer();
progressTimer.Tick += new EventHandler(clockTick);
progressTimer.Interval = progressInterval; //How fast every percentage point of completion needs to be added
progressTimer.Start();
}
public void clockTick(object sender, EventArgs e)
{
if (progressBar1.Value < 100)
{
progressBar1.Value++;
}
else
{
progressTimer.Stop();
}
}
You're doing it the wrong way. The main thread is reponsible of updating the user interface. So if you're blocking it with your calculations, it won't be able to draw the progress bar. Move your computing code in another thread and it should be fine.
always the main thread for manage user interface. use backgroundworker for this purpose.
to enable progress feature in backgroundworker set WorkerReportProgress(property) to true and
set WorkerSupportCancellation for stopping backgroundworker if needed.
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
// also use sender as backgroundworker
int i = 0;
foreach (MusicNote music in this.staff.Notes)
{
if(backgroundWorker1.CancellationPending) return;
music.Play(music.Dur);
Thread.Sleep(music.getInterval(music.Dur));
int p = (int) (i*100/ staff.Notes.Count); /*Count or Length */
backgroundWorker1.ReportProgress(p);
i++;
}
backgroundWorker1.ReportProgress(100);
}
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
progressBar1.Value = e.ProgressPercentage;
}