internal bool NavigateLog(NavigationLogDirection direction)
{
// determine proper index to navigate to
int locationIndex = 0;
if (direction == NavigationLogDirection.Backward && CanNavigateBackward)
{
locationIndex = (currentLocationIndex - 1);
}
else if (direction == NavigationLogDirection.Forward && CanNavigateForward)
{
locationIndex = (currentLocationIndex + 1);
}
else
{
return(false);
}
// initiate traversal request
ShellObject location = _locations[(int)locationIndex];
pendingNavigation = new PendingNavigation(location, locationIndex);
parent.Navigate(location);
return(true);
}
private void OnNavigationComplete(object sender, NavigationCompleteEventArgs args)
{
NavigationLogEventArgs eventArgs = new NavigationLogEventArgs();
bool oldCanNavigateBackward = CanNavigateBackward;
bool oldCanNavigateForward = CanNavigateForward;
if ((pendingNavigation != null))
{
// navigation log traversal in progress
// determine if new location is the same as the traversal request
int result = 0;
pendingNavigation.Location.NativeShellItem.Compare(
args.NewLocation.NativeShellItem, SICHINTF.SICHINT_ALLFIELDS, out result);
bool shellItemsEqual = (result == 0);
if (shellItemsEqual == false)
{
// new location is different than traversal request,
// behave is if it never happened!
// remove history following currentLocationIndex, append new item
if (currentLocationIndex < (_locations.Count - 1))
{
_locations.RemoveRange((int)currentLocationIndex + 1, (int)(_locations.Count - (currentLocationIndex + 1)));
}
_locations.Add(args.NewLocation);
currentLocationIndex = (_locations.Count - 1);
eventArgs.LocationsChanged = true;
}
else
{
// log traversal successful, update index
currentLocationIndex = (int)pendingNavigation.Index;
eventArgs.LocationsChanged = false;
}
pendingNavigation = null;
}
else
{
// remove history following currentLocationIndex, append new item
if (currentLocationIndex < (_locations.Count - 1))
{
_locations.RemoveRange((int)currentLocationIndex + 1, (int)(_locations.Count - (currentLocationIndex + 1)));
}
_locations.Add(args.NewLocation);
currentLocationIndex = (_locations.Count - 1);
eventArgs.LocationsChanged = true;
}
// update event args
eventArgs.CanNavigateBackwardChanged = (oldCanNavigateBackward != CanNavigateBackward);
eventArgs.CanNavigateForwardChanged = (oldCanNavigateForward != CanNavigateForward);
if (NavigationLogChanged != null)
{
NavigationLogChanged(this, eventArgs);
}
}
internal bool NavigateLog(int index)
{
// can't go anywhere
if (index >= _locations.Count || index < 0)
{
return(false);
}
// no need to re navigate to the same location
if (index == currentLocationIndex)
{
return(false);
}
// initiate traversal request
ShellObject location = _locations[(int)index];
pendingNavigation = new PendingNavigation(location, index);
parent.Navigate(location);
return(true);
}
internal bool NavigateLog(int index) {
// can't go anywhere
if (index >= _locations.Count || index < 0) { return false; }
// no need to re navigate to the same location
if (index == currentLocationIndex) { return false; }
// initiate traversal request
ShellObject location = _locations[(int)index];
pendingNavigation = new PendingNavigation(location, index);
parent.Navigate(location);
return true;
}
internal bool NavigateLog(NavigationLogDirection direction) {
// determine proper index to navigate to
int locationIndex = 0;
if (direction == NavigationLogDirection.Backward && CanNavigateBackward) {
locationIndex = (currentLocationIndex - 1);
} else if (direction == NavigationLogDirection.Forward && CanNavigateForward) {
locationIndex = (currentLocationIndex + 1);
} else {
return false;
}
// initiate traversal request
ShellObject location = _locations[(int)locationIndex];
pendingNavigation = new PendingNavigation(location, locationIndex);
parent.Navigate(location);
return true;
}
private void OnNavigationComplete(object sender, NavigationCompleteEventArgs args) {
NavigationLogEventArgs eventArgs = new NavigationLogEventArgs();
bool oldCanNavigateBackward = CanNavigateBackward;
bool oldCanNavigateForward = CanNavigateForward;
if ((pendingNavigation != null)) {
// navigation log traversal in progress
// determine if new location is the same as the traversal request
int result = 0;
pendingNavigation.Location.NativeShellItem.Compare(
args.NewLocation.NativeShellItem, SICHINTF.SICHINT_ALLFIELDS, out result);
bool shellItemsEqual = (result == 0);
if (shellItemsEqual == false) {
// new location is different than traversal request,
// behave is if it never happened!
// remove history following currentLocationIndex, append new item
if (currentLocationIndex < (_locations.Count - 1)) {
_locations.RemoveRange((int)currentLocationIndex + 1, (int)(_locations.Count - (currentLocationIndex + 1)));
}
_locations.Add(args.NewLocation);
currentLocationIndex = (_locations.Count - 1);
eventArgs.LocationsChanged = true;
} else {
// log traversal successful, update index
currentLocationIndex = (int)pendingNavigation.Index;
eventArgs.LocationsChanged = false;
}
pendingNavigation = null;
} else {
// remove history following currentLocationIndex, append new item
if (currentLocationIndex < (_locations.Count - 1)) {
_locations.RemoveRange((int)currentLocationIndex + 1, (int)(_locations.Count - (currentLocationIndex + 1)));
}
_locations.Add(args.NewLocation);
currentLocationIndex = (_locations.Count - 1);
eventArgs.LocationsChanged = true;
}
// update event args
eventArgs.CanNavigateBackwardChanged = (oldCanNavigateBackward != CanNavigateBackward);
eventArgs.CanNavigateForwardChanged = (oldCanNavigateForward != CanNavigateForward);
if (NavigationLogChanged != null) {
NavigationLogChanged(this, eventArgs);
}
}
private void OnNavigationFailed(object sender, NavigationFailedEventArgs args) {
pendingNavigation = null;
}
private void OnNavigationFailed(object sender, NavigationFailedEventArgs args)
{
pendingNavigation = null;
}
