Image handling in MFC

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I am trying to create a MFC application to create picture viewer software. I am able to select the folder and display all the images in it at a stretch. I want to implement pause, stop, next, previous options to it. As of now, when the images are running rest of the buttons and even the menu is disabled.
I hope I made the problem clear.
I am using Visual studio 2008.
Can anyone help me out.

[edit]
Hi there,
I am sorry for coming back after so much delay. Thanks for the interest in my question. I am adding code here for review.

C++

void CCA_ToolDlg::OnBnClickedPlay()
{
	HANDLE hFind;
	string strPrefix;
	WIN32_FIND_DATA FindData;
	char pattern[150];
	sprintf(pattern, "%s\\*.jpg", ImagePath);
	sprintf(ImagePath, "%s\\", ImagePath);
	hFind = FindFirstFile(pattern, &FindData);
	char *filename;
	filename = (char *)calloc(2000,sizeof(char));
	do
	{		
		strPrefix = string(ImagePath);
		strPrefix += FindData.cFileName;
		sprintf(filename,"%s",strPrefix.c_str());
		m_picCtrl.Load(CString(_T(filename)));
	}while(FindNextFile(hFind, &FindData));
	FindClose(hFind);
	free(filename);
}

This is the function when i click on play button.
Now, when i am inside the do loop, All my dialog doesnt respond to any user inputs. I am using PictureCrtl to display the images.
So, how I can handle other button functions when this function is running.
Thanks all.
[/edit]

Posted 4-Oct-11 23:14pm

Sathya Bhat

Updated 10-Oct-11 23:34pm

Richard MacCutchan

v2

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Comments

[no name] 5-Oct-11 6:34am

Unless you show some code, it is unlikely that anyone can guess what you mean by As of now, when the images are running rest of the buttons and even the menu is disabled. .

Albert Holguin 5-Oct-11 10:46am

Problem isn't clear... do you mean your application is running as a slide show? ...and you want to be able to add those new functions?

Sathya Bhat 11-Oct-11 2:23am

Hi there,
I am sorry for coming back after so much delay. Thanks for the interest in my question. I am adding code here for review.

void CCA_ToolDlg::OnBnClickedPlay()
{
HANDLE hFind;
string strPrefix;
WIN32_FIND_DATA FindData;
char pattern[150];
sprintf(pattern, "%s\\*.jpg", ImagePath);
sprintf(ImagePath, "%s\\", ImagePath);
hFind = FindFirstFile(pattern, &FindData);
char *filename;
filename = (char *)calloc(2000,sizeof(char));
do
{
strPrefix = string(ImagePath);
strPrefix += FindData.cFileName;
sprintf(filename,"%s",strPrefix.c_str());
m_picCtrl.Load(CString(_T(filename)));
}while(FindNextFile(hFind, &FindData));
FindClose(hFind);
free(filename);
}

This is the function when i click on play button.
Now, when i am inside the do loop, All my dialog doesnt respond to any user inputs. I am using PictureCrtl to display the images.
So, how I can handle other button functions when this function is running.
Thanks all.

Sathya Bhat 12-Oct-11 0:25am

Hi all,
I also found the issue in my coding. I solved it using timers.
Thanks all

Mystery Box 12-Feb-24 0:04am

Hi all
How we can set the time for creating the image and displaying that image. My issue is how to set the timer for image is been created and then displaying.

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pras3njit · Accepted Answer · 2011-10-11T09:48:00

hmm well, your problem is very simple, here is the solution

the reason you can't use the controls of the dialog is the culprit do-while loop, its executing very fast and literally hang your program until it finishes to find the last file and display its attribute.

you need to write the loop in a separate thread with a sleep of few seconds depending on how long you want one picture to stay on the screen and by that time your main dialog will respond to your mouse click or any other events.