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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef INKSCAPE_UI_VIEW_VIEW_H
#define INKSCAPE_UI_VIEW_VIEW_H
/*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Ralf Stephan <ralf@ark.in-berlin.de>
*
* Copyright (C) 2001-2002 Lauris Kaplinski
* Copyright (C) 2001 Ximian, Inc.
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <gdk/gdk.h>
#include <cstddef>
#include <memory>
#include <sigc++/connection.h>
#include "message.h"
#include "inkgc/gc-managed.h"
#include "gc-finalized.h"
#include "gc-anchored.h"
#include <2geom/forward.h>
/**
* Iterates until true or returns false.
* When used as signal accumulator, stops emission if one slot returns true.
*/
struct StopOnTrue {
typedef bool result_type;
template<typename T_iterator>
result_type operator()(T_iterator first, T_iterator last) const{
for (; first != last; ++first)
if (*first) return true;
return false;
}
};
/**
* Iterates until nonzero or returns 0.
* When used as signal accumulator, stops emission if one slot returns nonzero.
*/
struct StopOnNonZero {
typedef int result_type;
template<typename T_iterator>
result_type operator()(T_iterator first, T_iterator last) const{
for (; first != last; ++first)
if (*first) return *first;
return 0;
}
};
class SPDocument;
namespace Inkscape {
class MessageContext;
class MessageStack;
namespace UI {
namespace View {
/**
* View is an abstract base class of all UI document views. This
* includes both the editing window and the SVG preview, but does not
* include the non-UI RGBA buffer-based Inkscape::Drawing nor the XML editor or
* similar views. The View base class has very little functionality of
* its own.
*/
class View : public GC::Managed<>,
public GC::Finalized,
public GC::Anchored
{
public:
View();
/**
* Deletes and nulls all View message stacks and disconnects it from signals.
*/
~View() override;
void close() { _close(); }
/// Returns a pointer to the view's document.
SPDocument *doc() const
{ return _doc; }
/// Returns a pointer to the view's message stack.
std::shared_ptr<Inkscape::MessageStack> messageStack() const
{ return _message_stack; }
/// Returns a pointer to the view's tipsMessageContext.
Inkscape::MessageContext *tipsMessageContext() const
{ return _tips_message_context.get(); }
void emitResized(gdouble width, gdouble height);
void requestRedraw();
virtual void onResized (double, double) {};
virtual void onRedrawRequested() {};
virtual void onStatusMessage (Inkscape::MessageType type, gchar const *message) {};
virtual void onDocumentFilenameSet (gchar const* filename) {};
protected:
SPDocument *_doc;
std::shared_ptr<Inkscape::MessageStack> _message_stack;
std::unique_ptr<Inkscape::MessageContext> _tips_message_context;
virtual void _close();
/**
* Disconnects the view from the document signals, connects the view
* to a new one, and emits the _document_set_signal on the view.
*
* This is code common to all subclasses and called from their
* setDocument() methods after they are done.
*
* @param doc The new document to connect the view to.
*/
virtual void setDocument(SPDocument *doc);
sigc::signal<void,double,double> _resized_signal;
sigc::signal<void,gchar const*> _document_filename_set_signal;
sigc::signal<void> _redraw_requested_signal;
private:
sigc::connection _resized_connection;
sigc::connection _redraw_requested_connection;
sigc::connection _message_changed_connection; // foreign
sigc::connection _document_uri_set_connection; // foreign
};
}}}
#endif // INKSCAPE_UI_VIEW_VIEW_H
/*
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 :
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