Paste
When the user asks to paste data from the Clipboard, you should request a specific format and provide a callback method which will be called with the actual data. For instance:
refClipboard->request_contents("example_custom_target",
sigc::mem_fun(*this, &ExampleWindow::on_clipboard_received) );Here is an example callback method:
void ExampleWindow::on_clipboard_received(
const Gtk::SelectionData& selection_data)
{
Glib::ustring clipboard_data = selection_data.get_data_as_string();
//Do something with the pasted data.
}19.3.1. Discovering the available targets
To find out what targets are currently available on the Clipboard for pasting, call the request_targets() method, specifying a method to be called with the information. For instance:
refClipboard->request_targets( sigc::mem_fun(*this,
&ExampleWindow::on_clipboard_received_targets) );In your callback, compare the list of available targets with those that your application supports for pasting. You could enable or disable a Paste menu item, depending on whether pasting is currently possible. For instance:
void ExampleWindow::on_clipboard_received_targets(
const Glib::StringArrayHandle& targets_array)
{
// Get the list of available clipboard targets:
std::list<std::string> targets = targets_array;
const bool bPasteIsPossible =
std::find(targets.begin(), targets.end(),
example_target_custom) != targets.end();
// Enable/Disable the Paste button appropriately:
m_Button_Paste.set_sensitive(bPasteIsPossible);
}