9.3.6Adding AlbumEditDlg to our main form

Action

1

In the AlbumEditDlg.cs source

private PhotoAlbum _album;

window, add a private

PhotoAlbum variable to hold the

album to edit.

2

Modify the constructor to accept

public AlbumEditDlg(PhotoAlbum album)

a PhotoAlbum parameter.

{

3

Within the constructor, set the

. . .

album variable and call

// Initialize the dialog settings

ResetSettings to initialize the

_album = album;

ResetSettings();

dialog’s controls.

}

310

Action

4

Implement ResetSettings to

protected override void ResetSettings()

set the controls to their

{

corresponding settings in the

// Set file name

txtAlbumFile.Text = _album.FileName;

current photograph.

How-to

// Set title, and use in title bar

this.txtTitle.Text = _album.Title;

a. Assign the album file name and

this.Text = String.Format(

title text boxes.

"{0} - Album Properties",

b. Place the album title in the title

txtTitle.Text);

bar as well.

// Set display option values

c. Set the radio buttons based on

_selectedDisplayOption

= _album.DisplayOption;

the DisplayOption setting for

switch (_selectedDisplayOption)

the album.

{

d. Check the check box button if

case PhotoAlbum.DisplayValEnum.Date:

this.rbtnDate.Checked = true;

the album contains a non-

break;

empty password.

e. Assign both password text

case PhotoAlbum.DisplayValEnum.FileName:

this.rbtnFileName.Checked = true;

boxes to the current password.

break;

case PhotoAlbum.DisplayValEnum.Caption:

default:

this.rbtnCaption.Checked = true;

break;

}

string pwd = _album.Password;

cbtnPassword.Checked

= (pwd != null && pwd.Length > 0);

txtAlbumPwd.Text = pwd;

txtConfirmPwd.Text = pwd;

}

5

Implement the SaveSettings

protected override bool SaveSettings()

method to store the results after

{

the user has clicked OK.

bool valid = ValidPasswords();

How-to

if (valid)

{

a. Use the ValidPasswords

_album.Title = txtTitle.Text;

method to verify the pass-

_album.DisplayOption

words settings.

= this._selectedDisplayOption;

b. Store the new settings only if

if (cbtnPassword.Checked)

the passwords were valid.

_album.Password = txtAlbumPwd.Text;

c. Return whether the settings

else

_album.Password = null;

were successfully stored.

}

return valid;

}

6

Add a TextChanged event

private void txtTitle_TextChanged

handler to the txtTitle control

(object sender, System.EventArgs e)

to update the title bar as the title

{

this.Text = String.Format(

text is modified.

"{0} - Album Properties",

txtTitle.Text);

}

BUTTON CLASSES

312