public void CreateCourse(Course course)
{
try
{
database.GetCollection<Course>("courses").InsertOneAsync(course);
}
catch (Exception exception)
{
throw new Exception("Error during new course creating", exception);
}
}
// edit/redo menu item handler
private void redoToolStripMenuItem_Click(object sender, EventArgs e)
{
working(true);
saveText();
course = course.ReDo();
updateScreen();
working(false);
}
// generalized method to paste clip without scaling in one of 4 corners of picture
private void pasteClip(Course.ImagePlacement place)
{
working(true);
saveText();
course.Paste(place);
saveCourse();
updateScreen();
working(false);
}
// method to open a course, either new or existing
// desc - text instructions for the user
// isnew - true if this should be a new course
// returns true if course was successfully opened
private bool openCourse(string desc, bool isnew)
{
string dir = openDialog(desc);
bool r = false;
if (dir != "")
{ // if not canceled in directory selection dialog...
Course c = (new Course()).Open(dir, isnew);
// returns null if unable to open a new course at this directory, i.e. one already exists there
if (c != null)
{
course = c;
saveDirectorySetting(dir);
updateScreen();
r = true;
}
else
{
MessageBox.Show("A course already exists in this directory. Please create a new directory.");
}
}
return r;
}
// Form1_Load method
// initialization of the form
private void Form1_Load(object sender, EventArgs e)
{
// backgroundWorker2 saves changes to the Text and Answer fields every 15 seconds
backgroundWorker2.RunWorkerAsync();
sessions.BringToFront(); // when editing in design view it may have been left in the back
// dir is the directory where the course will be found
// it's saved in the configuration settings for this program
string dir = (new Properties.Settings()).Course;
// decode the appName ("Cyryx Self Study")
for (int i = 0; i < a.Length; i++)
c[i] = (byte)(a[i] ^ b[i]);
ASCIIEncoding enc = new ASCIIEncoding();
appName = enc.GetString(c);
// open the course and assign the instance variable for it
course = (new Course()).Open(dir);
// get the saved window location and state and apply them to the form
Location = course.Location;
WindowState = course.WindowState;
help.LoadFile("help.rtf");
helpShow(course.Help);
// standardized update routine that writes the form depending on the current state
updateScreen();
}
// Method to clip the image without resizing, depending on which corner it is aligned to.
private Bitmap clipImage(Bitmap bm, int w, int h, Course.ImagePlacement place)
{
Bitmap result = new Bitmap(w, h);
// first rotate / flip depending on ultimate placement
switch (place) {
case Course.ImagePlacement.lowerLeft:
bm.RotateFlip(RotateFlipType.RotateNoneFlipY);
break;
case Course.ImagePlacement.lowerRight:
bm.RotateFlip(RotateFlipType.RotateNoneFlipXY);
break;
case Course.ImagePlacement.upperRight:
bm.RotateFlip(RotateFlipType.RotateNoneFlipX);
break;
}
// unscaled clip, always to upper left corner
using (Graphics g = Graphics.FromImage((System.Drawing.Image)result))
g.DrawImageUnscaled(bm,0, 0, w, h);
bm.Dispose();
// do the inverse of the rotate / flip
switch (place){
case Course.ImagePlacement.lowerLeft:
result.RotateFlip(RotateFlipType.RotateNoneFlipY);
break;
case Course.ImagePlacement.lowerRight:
result.RotateFlip(RotateFlipType.RotateNoneFlipXY);
break;
case Course.ImagePlacement.upperRight:
result.RotateFlip(RotateFlipType.RotateNoneFlipX);
break;
}
return result;
}
// Method to set the image bitmap depending on placement option
public void SetImage(Bitmap image, Course.ImagePlacement place)
{
switch (place) {
case Course.ImagePlacement.fit:
saveImage(resizeImage(image,imageWidth,imageHeight));
break;
default:
saveImage(clipImage(image,imageWidth,imageHeight,place));
break;
}
}
public void EditCourse(Course course)
{
try
{
database.GetCollection<Course>("courses").ReplaceOneAsync(a => a.Id == course.Id, course);
}
catch (Exception exception)
{
throw new Exception("Error during course edit", exception);
}
}