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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* A bare minimum example of deriving from Inkscape::UI:Widget::Panel.
*
* Author:
* Tavmjong Bah
*
* Copyright (C) Tavmjong Bah <tavmjong@free.fr>
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "prototype.h"
#include "desktop.h"
#include "document.h"
#include "selection.h"
#include "verbs.h"
// Only for use in demonstration widget.
#include "object/sp-root.h"
namespace Inkscape {
namespace UI {
namespace Dialog {
// Note that in order for a dialog to be restored, it must be listed in SPDesktop::show_dialogs().
Prototype::Prototype() :
UI::Widget::Panel("/dialogs/prototype", SP_VERB_DIALOG_PROTOTYPE),
desktopTracker() //,
// desktopChangedConnection()
{
std::cout << "Prototype::Prototype()" << std::endl;
// A widget for demonstration that displays the current SVG's id.
_getContents()->pack_start(label); // Panel::_getContents()
// desktop is set by Panel constructor so this should never be NULL.
// Note, we need to use getDesktop() since _desktop is private in Panel.h.
// It should probably be protected instead... but need to verify in doesn't break anything.
if (getDesktop() == nullptr) {
std::cerr << "Prototype::Prototype: desktop is NULL!" << std::endl;
}
connectionDesktopChanged = desktopTracker.connectDesktopChanged(
sigc::mem_fun(*this, &Prototype::handleDesktopChanged) );
desktopTracker.connect(GTK_WIDGET(gobj()));
// This results in calling handleDocumentReplaced twice. Fix me!
connectionDocumentReplaced = getDesktop()->connectDocumentReplaced(
sigc::mem_fun(this, &Prototype::handleDocumentReplaced));
// Alternative mechanism but results in calling handleDocumentReplaced four times.
// signalDocumentReplaced().connect(
// sigc::mem_fun(this, &Prototype::handleDocumentReplaced));
connectionSelectionChanged = getDesktop()->getSelection()->connectChanged(
sigc::hide(sigc::mem_fun(this, &Prototype::handleSelectionChanged)));
updateLabel();
}
Prototype::~Prototype()
{
// Never actually called.
std::cout << "Prototype::~Prototype()" << std::endl;
connectionDesktopChanged.disconnect();
connectionDocumentReplaced.disconnect();
connectionSelectionChanged.disconnect();
}
/*
* Called when a dialog is displayed, including when a dialog is reopened.
* (When a dialog is closed, it is not destroyed so the constructor is not called.
* This function can handle any reinitialization needed.)
*/
void
Prototype::present()
{
std::cout << "Prototype::present()" << std::endl;
UI::Widget::Panel::present();
}
/*
* When Inkscape is first opened, a default document is shown. If another document is immediately
* opened, it will replace the default document in the same desktop. This function handles the
* change. Bug: This is called twice for some reason.
*/
void
Prototype::handleDocumentReplaced(SPDesktop *desktop, SPDocument * /* document */)
{
std::cout << "Prototype::handleDocumentReplaced()" << std::endl;
if (getDesktop() != desktop) {
std::cerr << "Prototype::handleDocumentReplaced(): Error: panel desktop not equal to existing desktop!" << std::endl;
}
connectionSelectionChanged.disconnect();
connectionSelectionChanged = desktop->getSelection()->connectChanged(
sigc::hide(sigc::mem_fun(this, &Prototype::handleSelectionChanged)));
// Update demonstration widget.
updateLabel();
}
/*
* When a dialog is floating, it is connected to the active desktop.
*/
void
Prototype::handleDesktopChanged(SPDesktop* desktop) {
std::cout << "Prototype::handleDesktopChanged(): " << desktop << std::endl;
if (getDesktop() == desktop) {
// This will happen after construction of Prototype. We've already
// set up signals so just return.
std::cout << " getDesktop() == desktop" << std::endl;
return;
}
// Connections are disconnect safe.
connectionSelectionChanged.disconnect();
connectionDocumentReplaced.disconnect();
setDesktop( desktop );
connectionSelectionChanged = desktop->getSelection()->connectChanged(
sigc::hide(sigc::mem_fun(this, &Prototype::handleSelectionChanged)));
connectionDocumentReplaced = desktop->connectDocumentReplaced(
sigc::mem_fun(this, &Prototype::handleDocumentReplaced));
// Update demonstration widget.
updateLabel();
}
/*
* Handle a change in which objects are selected in a document.
*/
void
Prototype::handleSelectionChanged() {
std::cout << "Prototype::handleSelectionChanged()" << std::endl;
// Update demonstration widget.
label.set_label("Selection Changed!");
}
/*
* Update label... just a utility function for this example.
*/
void
Prototype::updateLabel() {
const gchar* root_id = getDesktop()->getDocument()->getRoot()->getId();
Glib::ustring label_string("Document's SVG id: ");
label_string += (root_id?root_id:"null");
label.set_label(label_string);
}
} // namespace Dialog
} // namespace UI
} // namespace Inkscape
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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