private void ButtonAddExtension_Click(object sender, EventArgs e)
{
FormExtensionSelect dialog = new FormExtensionSelect();
try
{
for (int i = 0; i < consumerExtensionDetails.Length; i++)
dialog.ComboBoxExtension.Items.Add(consumerExtensionDetails[i].ExtensionAttribute.ExtensionName);
if (consumerExtensionDetails.Length > 0)
dialog.ComboBoxExtension.SelectedIndex = 0;
if (dialog.ShowDialog() == DialogResult.OK)
{
// Ensure that single-instance extensions are not added more than once.
int selected = dialog.ComboBoxExtension.SelectedIndex;
if (! consumerExtensionDetails[selected].ExtensionAttribute.AllowMultipleInstances)
{
int i = 0;
while ((i < activeExtensions.Length) && (activeExtensions[i].ExtensionDetails != consumerExtensionDetails[selected]))
i++;
if (i < activeExtensions.Length)
{
MessageBox.Show("Multiple instances of this extension are not allowed.",
"Error", MessageBoxButtons.OK, MessageBoxIcon.Hand, MessageBoxDefaultButton.Button1);
return;
}
}
// Determine the next available extension ID.
int extensionID = 0;
for (int i = 0; i < activeExtensions.Length; i++)
if (activeExtensions[i].ExtensionID > extensionID)
extensionID = activeExtensions[i].ExtensionID;
extensionID++;
// Activate the extension.
ActiveExtensionInfo extensionInfo = ActivateExtension(consumerExtensionDetails[selected],
extensionID, "Extension " + extensionID);
// Add it to the active extension array.
ActiveExtensionInfo[] newInfo = new ActiveExtensionInfo[activeExtensions.Length + 1];
activeExtensions.CopyTo(newInfo, 0);
newInfo[activeExtensions.Length] = extensionInfo;
activeExtensions = newInfo;
// Update the saved configuration.
UpdateActiveExtensionConfig();
// Update the user interface.
UpdateSortedActiveExtensions();
RebuildPageMenu();
RepopulateExtensionsDialog();
}
}
finally
{
dialog.Dispose();
}
}
private void ButtonRemoveExtension_Click(object sender, EventArgs e)
{
int i = extensionsDialog.ListBoxExtensions.SelectedIndex;
if (i >= 0)
{
// Dispose of the extension.
DeactivateExtension(activeExtensions[i]);
// Remove it from the active extension array.
ActiveExtensionInfo[] newInfo = new ActiveExtensionInfo[activeExtensions.Length - 1];
for (int j = 0; j < i; j++)
newInfo[j] = activeExtensions[j];
for (int j = i + 1; j < activeExtensions.Length; j++)
newInfo[j - 1] = activeExtensions[j];
activeExtensions = newInfo;
// Update the saved configuration.
UpdateActiveExtensionConfig();
// Update the user interface.
UpdateSortedActiveExtensions();
RebuildPageMenu();
RepopulateExtensionsDialog();
}
}
private void ComboBoxProvider_SelectedIndexChanged(object sender, EventArgs e)
{
if (! repopulatingExtensionsDialog)
{
// Unload the current provider and load the new one.
if (gpsProvider != null)
DeactivateExtension(gpsProvider);
int selected = extensionsDialog.ComboBoxProvider.SelectedIndex;
gpsProvider = ActivateExtension(providerExtensionDetails[selected], -1,
providerExtensionDetails[selected].ExtensionDLL);
// Update the saved configuration.
configSource.Configs["Settings"].Set("GPS Provider Dll", providerExtensionDetails[selected].ExtensionDLL);
configSource.Save();
// Update the user interface.
RebuildPageMenu();
RepopulateExtensionsDialog();
}
}
private void ActivateExtensions()
{
// First unload all currently loaded extensions, if any.
DeactivateExtensions();
// Create a GPS provider object, if one was specified.
string gpsProviderDll = configSource.Configs["Settings"].GetString("GPS Provider Dll", "");
if (gpsProviderDll != "")
{
// Find the corresponding extension details.
int i = 0;
while ((i < providerExtensionDetails.Length) && (providerExtensionDetails[i].ExtensionDLL != gpsProviderDll))
i++;
if (i >= providerExtensionDetails.Length)
throw new Exception("Invalid GPS provider DLL setting: " + gpsProviderDll);
// Create the extension.
gpsProvider = ActivateExtension(providerExtensionDetails[i], -1, gpsProviderDll);
}
// Read in the active extension list.
int numActiveExtensions = configSource.Configs["Settings"].GetInt("Num Active Extensions", 0);
activeExtensions = new ActiveExtensionInfo[numActiveExtensions];
for (int i = 0; i < numActiveExtensions; i++)
{
string section = "Active Extension " + i;
Nini.Config.IConfig config = configSource.Configs[section];
if (config == null)
throw new Exception("Missing configuration file section: " + section);
int extensionID = config.GetInt("Extension ID", 0);
string extensionDll = config.GetString("Extension Dll", "");
// Find the corresponding extension details.
int j = 0;
while ((j < consumerExtensionDetails.Length) && (consumerExtensionDetails[j].ExtensionDLL != extensionDll))
j++;
if (j >= consumerExtensionDetails.Length)
throw new Exception("Invalid GPS extension DLL setting for active extension " + i + ": " + extensionDll);
ExtensionDetails extensionDetails = consumerExtensionDetails[j];
// Ensure that the extension ID is unique.
j = 0;
while ((j < i) && (activeExtensions[j].ExtensionID != extensionID))
j++;
if (j < i)
throw new Exception("Active extensions " + i + " and " + j + " have a duplicate extension ID: " + extensionID);
// Create and configure the extension.
activeExtensions[i] = ActivateExtension(extensionDetails, extensionID,
"Extension " + extensionID);
}
UpdateSortedActiveExtensions();
RebuildPageMenu();
}
private void DeactivateExtensions()
{
if (gpsProvider != null)
{
DeactivateExtension(gpsProvider);
gpsProvider = null;
}
if (activeExtensions != null)
{
for (int i = 0; i < activeExtensions.Length; i++)
{
if (activeExtensions[i] != null)
DeactivateExtension(activeExtensions[i]);
}
activeExtensions = null;
}
}
private void DeactivateExtension(ActiveExtensionInfo extensionInfo)
{
if (extensionInfo.Control != null)
pluginPanel.Controls.Remove(extensionInfo.Control);
if (extensionInfo.MenuButton != null)
pageMenuPanel.ContentControls.Remove(extensionInfo.MenuButton);
extensionInfo.Extension.ExtensionDispose();
}
private ActiveExtensionInfo ActivateExtension(ExtensionDetails extensionDetails, int extensionID, string configSection)
{
// TODO: error recovery from exceptions during ExtensionInit?
ActiveExtensionInfo extensionInfo = new ActiveExtensionInfo();
extensionInfo.ExtensionID = extensionID;
extensionInfo.ExtensionDetails = extensionDetails;
extensionInfo.Extension = (IExtension)Activator.CreateInstance(extensionDetails.ExtensionType);
if (configSource.Configs[configSection] == null)
configSource.AddConfig(configSection);
extensionInfo.Extension.ExtensionInit(this, extensionID, new NiniIConfigWrapper(configSource.Configs[configSection]));
if (extensionInfo.ExtensionDetails.ExtensionAttribute.HasUserInterface)
{
extensionInfo.Control = extensionInfo.Extension.GetUserInterface();
extensionInfo.Control.Visible = false;
pluginPanel.Controls.Add(extensionInfo.Control);
extensionInfo.Control.Location = new Point(0, 0);
extensionInfo.Extension.ResizeUserInterface(pluginPanel.ClientSize);
}
if (extensionInfo.ExtensionDetails.ExtensionAttribute.IsProvider)
{
extensionInfo.Extension.NewGPSFix += new GPSFixEvent(Extension_NewGPSFix);
extensionInfo.Extension.NewGPSSatelliteData += new GPSSatelliteDataEvent(Extension_NewGPSSatelliteData);
}
return extensionInfo;
}
