private void AttachFormStateAutoSaver(MdiContainerWithState mdiContainerWithState)
{
PersistableFormState formState = mdiContainerWithState.State.FormState;
formState.AttachTo(mdiContainerWithState.Form);
formState.Changed += (_, __) => AutoSaveMdiContainerList();
}
private void RestoreMdiContainerState(MdiContainerWithState mdiContainerWithState)
{
MdiContainerForm mdiContainerForm = mdiContainerWithState.Form;
PersistableFormState formState = mdiContainerWithState.State.FormState;
bool boundsInitialized = false;
Rectangle targetBounds = formState.Bounds;
// If all bounds are known initialize from those.
// Do make sure the window ends up on a visible working area.
targetBounds.Intersect(Screen.GetWorkingArea(targetBounds));
if (targetBounds.Width >= mdiContainerForm.MinimumSize.Width && targetBounds.Height >= mdiContainerForm.MinimumSize.Height)
{
mdiContainerForm.SetBounds(targetBounds.Left, targetBounds.Top, targetBounds.Width, targetBounds.Height, BoundsSpecified.All);
boundsInitialized = true;
}
// Determine a window state independently if no formState was applied successfully.
if (!boundsInitialized)
{
SetDefaultSizeAndPosition(mdiContainerForm);
}
// Restore maximized setting after setting the Bounds.
if (formState.Maximized)
{
mdiContainerForm.WindowState = FormWindowState.Maximized;
}
}
internal MdiContainerForm CreateNewMdiContainerForm()
{
var mdiContainerForm = new MdiContainerForm();
RegisterMdiContainerFormEvents(mdiContainerForm);
var formWithDefaultState = new MdiContainerWithState(mdiContainerForm, new MdiContainerState(new PersistableFormState(false, Rectangle.Empty)));
mdiContainers.Add(formWithDefaultState);
mdiContainerForm.Load += (_, __) =>
{
SetDefaultSizeAndPosition(mdiContainerForm);
AttachFormStateAutoSaver(formWithDefaultState);
};
return(mdiContainerForm);
}
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
if (!HasSession)
{
Close();
}
else
{
#if DEBUG
PieceImages.DeployRuntimePieceImageFiles();
#endif
// Load chess piece images.
PieceImages.LoadChessPieceImages();
Visible = false;
if (Session.Current.TryGetAutoSaveValue(SettingKeys.Windows, out IEnumerable <PersistableFormState> states))
{
// First restore all states, then attach auto-save events.
// Create all forms before doing anything else.
foreach (PersistableFormState formState in states)
{
mdiContainers.Add(new MdiContainerWithState(new MdiContainerForm(), new MdiContainerState(formState)));
}
// Activate from back to front.
for (int i = mdiContainers.Count - 1; i >= 0; i--)
{
MdiContainerWithState formWithState = mdiContainers[i];
formWithState.Form.Load += (_, __) => RestoreMdiContainerState(formWithState);
if (i > 0)
{
// Activate by activating the docked control.
formWithState.Form.DockedControl.EnsureActivated();
}
else
{
// Most recently activated window should open command line arguments.
// Alternative is to open an additional new window, but this is inconsistent with ReceivedMessageFromAnotherInstance().
// TODO: maybe turn this into a preference? E.g. "open_files_in_new_window_on_launch".
formWithState.Form.OpenCommandLineArgs(commandLineArgs);
}
}
// Only now register auto-save events.
foreach (MdiContainerWithState formWithState in mdiContainers)
{
RegisterMdiContainerFormEvents(formWithState.Form);
AttachFormStateAutoSaver(formWithState);
}
}
else
{
ShowNewMdiContainerForm(commandLineArgs);
}
}
}
