/* $Id: clipboard.hg,v 1.17 2006/06/13 17:16:26 murrayc Exp $ */ /* clipboard.h * * Copyright (C) 2002 The gtkmm Development Team * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the Free * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include _DEFS(gtkmm,gtk) _PINCLUDE(glibmm/private/object_p.h) namespace Gtk { #ifndef DOXYGEN_SHOULD_SKIP_THIS class TextBuffer; #endif //DOXYGEN_SHOULD_SKIP_THIS /** The Clipboard object represents a clipboard of data shared between different processes or between * different widgets in the same process. Each clipboard is identified by a name encoded as a GdkAtom. * * (Conversion to and from strings can be done with gdk_atom_intern() and gdk_atom_name().) The default * clipboard corresponds to the "CLIPBOARD" atom; another commonly used clipboard is the "PRIMARY" clipboard, * which, in X, traditionally contains the currently selected text. * * To support having a number of different formats on the clipboard at the same time, the clipboard mechanism * allows providing callbacks instead of the actual data. When you set the contents of the clipboard, you can * either supply the data directly (via functions like set_text()), or you can supply a callback * to be called at a later time when the data is needed (via set().) Providing a callback also avoids having to * make copies of the data when it is not needed. * * Requesting the data from the clipboard is essentially asynchronous. If the contents of the clipboard are * provided within the same process, then a direct function call will be made to retrieve the data, but if they * are provided by another process, then the data needs to be retrieved from the other process, which may take * some time. To avoid blocking the user interface, the call to request the selection, request_contents() takes * a callback that will be called when the contents are received (or when the request fails.) If you don't want * to deal with providing a separate callback, you can also use wait_for_contents(). This runs the * GLib main loop recursively waiting for the contents. This can simplify the code flow, but you still have to * be aware that other callbacks in your program can be called while this recursive mainloop is running. * * Along with the functions to get the clipboard contents as an arbitrary data chunk, there are also functions * to retrieve it as text, request_text() and wait_for_text(). These functions take * care of determining which formats are advertised by the clipboard provider, asking for the clipboard in the * best available format and converting the results into the UTF-8 encoding. */ class Clipboard : public Glib::Object { _CLASS_GOBJECT(Clipboard, GtkClipboard, GTK_CLIPBOARD, Glib::Object, GObject) public: _WRAP_METHOD(static Glib::RefPtr get(GdkAtom selection = GDK_SELECTION_CLIPBOARD), gtk_clipboard_get, refreturn) _WRAP_METHOD(static Glib::RefPtr get_for_display(const Glib::RefPtr& display, GdkAtom selection = GDK_SELECTION_CLIPBOARD), gtk_clipboard_get_for_display, refreturn) _WRAP_METHOD(Glib::RefPtr get_display(), gtk_clipboard_get_display, refreturn) _WRAP_METHOD(Glib::RefPtr get_display() const, gtk_clipboard_get_display, refreturn, constversion) /// For instance: void on_get(Gtk::SelectionData& selection_data, guint info); typedef sigc::slot SlotGet; /// For instance: void on_clear(); typedef sigc::slot SlotClear; /** Virtually sets the contents of the specified clipboard by providing * a list of supported formats for the clipboard data and a function * to call to get the actual data when it is requested. * * @param targets Information about the available forms for the clipboard data. * @param slot_get method to call to get the actual clipboard data. * @param slot_clear When the clipboard contents are set again, this method will * be called, and slot_get will not be subsequently called. * * @return true if setting the clipboard data succeeded. If setting * the clipboard data failed then the provided callback methods * will be ignored. */ bool set(const ArrayHandle_TargetEntry& targets, const SlotGet& slot_get, const SlotClear& slot_clear); _IGNORE(gtk_clipboard_set_with_owner, gtk_clipboard_set_with_data) _WRAP_METHOD(Glib::RefPtr get_owner(), gtk_clipboard_get_owner, refreturn) _WRAP_METHOD(Glib::RefPtr get_owner() const, gtk_clipboard_get_owner, refreturn, constversion) /** * Clears the contents of the clipboard. Generally this should only * be called between the time you call set() * and when the slot_clear you supplied is called. Otherwise, the * clipboard may be owned by someone else. */ _WRAP_METHOD(void clear(), gtk_clipboard_clear) /** * Sets the contents of the clipboard to the given UTF-8 string. GTK+ will * make a copy of the text and take responsibility for responding * for requests for the text, and for converting the text into * the requested format. * * @param text A UTF-8 string. * */ void set_text(const Glib::ustring& text); _IGNORE(gtk_clipboard_set_text) _WRAP_METHOD(void set_image(const Glib::RefPtr& pixbuf), gtk_clipboard_set_image) /// For instance: void on_received(const SelectionData& selection_data); typedef sigc::slot SlotReceived; /** Requests the contents of clipboard as the given target. * When the results of the result are later received the supplied callback * will be called. * * @param target The form into which the clipboard * owner should convert the selection. * @param slot A function to call when the results are received * (or the retrieval fails). If the retrieval fails * the length field of selection_data will be * negative. **/ void request_contents(const Glib::ustring& target, const SlotReceived& slot); _IGNORE(gtk_clipboard_request_contents) /// For instance: void on_text_received(const Glib::ustring& text); typedef sigc::slot SlotTextReceived; /** Requests the contents of the clipboard as text. When the text is * later received, it will be converted to UTF-8 if necessary, and * slot will be called. * * The text parameter to slot will contain the resulting text if * the request succeeded, or will be empty if it failed. This could happen for * various reasons, in particular if the clipboard was empty or if the * contents of the clipboard could not be converted into text form. * * @param slot: a function to call when the text is received, * or the retrieval fails. (It will always be called * one way or the other.) */ void request_text(const SlotTextReceived& slot); _IGNORE(gtk_clipboard_request_text) /// For instance: void on_rich_text_received(const Glib::ustring& format, const std::string& text); typedef sigc::slot SlotRichTextReceived; /** Requests the contents of the clipboard as rich text. When the rich text is later received, * callback will be called. * * The text parameter to the callback will contain the resulting rich text if the request succeeded, or * an empty string if it failed. This function can fail for various reasons, in particular if the * clipboard was empty or if the contents of the clipboard could not be converted into rich text form. * * * @param slot: a function to call when the text is received, * or the retrieval fails. (It will always be called * one way or the other.) */ void request_rich_text(const Glib::RefPtr& buffer, const SlotRichTextReceived& slot); _IGNORE(gtk_clipboard_request_rich_text) /// For instance: void on_image_received(const Glib::RefPtr& text); typedef sigc::slot&> SlotImageReceived; /** Requests the contents of the clipboard as image. When the image is * later received, it will be converted to a Gdk::Pixbuf. * This function waits for * the data to be received using the main loop, so events, * timeouts, etc, may be dispatched during the wait. * * The pixbuf parameter to slot will contain the resulting pixbuf if * the request succeeded, or will be empty if it failed. This could happen for * various reasons, in particular if the clipboard was empty or if the * contents of the clipboard could not be converted into image form. * * @param slot: a function to call when the text is received, * or the retrieval fails. (It will always be called * one way or the other.) */ void request_image(const SlotImageReceived& slot); _IGNORE(gtk_clipboard_request_image) /// For instance: void on_targetsreceived(const Glib::StringArrayHandle& targets); typedef sigc::slot SlotTargetsReceived; /** Requests the contents of the clipboard as list of supported targets. * When the list is later received, callback will be called. * * The targets parameter to slot will contain the resulting targets if * the request succeeded. * * @param slot a function to call when the targets are received, * or the retrieval fails. (It will always be called * one way or the other.) Remember that Glib::StringArrayHandle * is an intermediate type, so you should convert it to a * standard C++ container. * * @newin2p4 */ void request_targets(const SlotTargetsReceived& slot); _IGNORE(gtk_clipboard_request_targets) /** * Requests the contents of the clipboard using the given target. * This function waits for the data to be received using the main * loop, so events, timeouts, etc, may be dispatched during the wait. * * @param target The form into which the clipboard owner should convert the selection. * * @return A SelectionData object, which will be invalid if retrieving the given target failed. */ SelectionData wait_for_contents(const Glib::ustring& target) const; _IGNORE(gtk_clipboard_wait_for_contents) _WRAP_METHOD(Glib::ustring wait_for_text() const, gtk_clipboard_wait_for_text) std::string wait_for_rich_text(const Glib::RefPtr& buffer, std::string& format); _IGNORE(gtk_clipboard_wait_for_rich_text) //Maybe the result should be const, but constness is not so clear-cut here. murrayc _WRAP_METHOD(Glib::RefPtr wait_for_image() const, gtk_clipboard_wait_for_image) _WRAP_METHOD(bool wait_is_text_available() const, gtk_clipboard_wait_is_text_available) _WRAP_METHOD(bool wait_is_rich_text_available(const Glib::RefPtr& buffer) const, gtk_clipboard_wait_is_rich_text_available) _WRAP_METHOD(bool wait_is_image_available() const, gtk_clipboard_wait_is_image_available) _WRAP_METHOD(bool wait_is_target_available(const Glib::ustring& target), gtk_clipboard_wait_is_target_available) /** Returns a list of targets that are present on the clipboard. * This function waits for the data to be received using the main * loop, so events, timeouts, etc, may be dispatched during the wait. * * @result targets: The targets. * * @newin2p4 */ Glib::StringArrayHandle wait_for_targets() const; _IGNORE(gtk_clipboard_wait_for_targets) /** Hints that the clipboard data should be stored somewhere when the application exits or when store() * is called. * * This value is reset when the clipboard owner changes. Where the clipboard data is stored is platform * dependent, see Gdk::Display::store_clipboard() for more information. * * @param targets Array containing information about which forms should be stored. */ void set_can_store(const ArrayHandle_TargetEntry& targets); /** Hints that all forms of clipboard data should be stored somewhere when the application exits or when store() * is called. * * This value is reset when the clipboard owner changes. Where the clipboard data is stored is platform * dependent, see Gdk::Display::store_clipboard() for more information. */ void set_can_store(); _IGNORE(void gtk_clipboard_set_can_store) _WRAP_METHOD(void store(), gtk_clipboard_store) //We use no_default_handler because this signal was added and we don't want to break the ABI by adding a virtual function. _WRAP_SIGNAL(void owner_change(GdkEventOwnerChange* event), "owner_change", no_default_handler) }; } /* namespace Gtk */