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);
}
}
/// <summary>
/// Clears the contents of the navigation log.
/// </summary>
public void ClearLog() {
// nothing to do
if (_locations.Count == 0) { return; }
bool oldCanNavigateBackward = CanNavigateBackward;
bool oldCanNavigateForward = CanNavigateForward;
_locations.Clear();
this.currentLocationIndex = -1;
NavigationLogEventArgs args = new NavigationLogEventArgs();
args.LocationsChanged = true;
args.CanNavigateBackwardChanged = (oldCanNavigateBackward != CanNavigateBackward);
args.CanNavigateForwardChanged = (oldCanNavigateForward != CanNavigateForward);
if (NavigationLogChanged != null) {
NavigationLogChanged(this, args);
}
}
/// <summary>
/// Clears the contents of the navigation log.
/// </summary>
public void ClearLog()
{
// nothing to do
if (_locations.Count == 0)
{
return;
}
bool oldCanNavigateBackward = CanNavigateBackward;
bool oldCanNavigateForward = CanNavigateForward;
_locations.Clear();
this.currentLocationIndex = -1;
NavigationLogEventArgs args = new NavigationLogEventArgs();
args.LocationsChanged = true;
args.CanNavigateBackwardChanged = (oldCanNavigateBackward != CanNavigateBackward);
args.CanNavigateForwardChanged = (oldCanNavigateForward != CanNavigateForward);
if (NavigationLogChanged != null)
{
NavigationLogChanged(this, args);
}
}
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);
}
}