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/** \file
* Gtkmm facade/wrapper around zoom_status code that formerly lived
* in desktop-widget.cpp
*
* Authors:
* Ralf Stephan <ralf@ark.in-berlin.de>
* Lauris Kaplinski <lauris@kaplinski.com>
* MenTaLguY <mental@rydia.net>
* bulia byak <buliabyak@users.sf.net>
*
* Copyright (C) 2005 Ralf Stephan
* Copyright (C) 2004 MenTaLguY
* Copyright (C) 1999-2002 Lauris Kaplinski
* Copyright (C) 2000-2001 Ximian, Inc.
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include "ui/widget/zoom-status.h"
#include "desktop.h"
#include "desktop-handles.h"
#include "widgets/spw-utilities.h"
#include "libnr/nr-convert2geom.h"
namespace Inkscape {
namespace UI {
namespace Widget {
ZoomStatus::ZoomStatus()
: _adj(0.0, -1.0, 1.0, 0.1, 0.1)
{
_dt = 0;
_upd_f = false;
property_numeric() = false;
property_update_policy() = Gtk::UPDATE_ALWAYS;
sp_set_font_size_smaller(static_cast<GtkWidget*>((void*)gobj()));
}
ZoomStatus::~ZoomStatus()
{
_dt = 0;
}
void
ZoomStatus::init(SPDesktop *dt)
{
_dt = dt;
property_digits() = 4;
_adj.set_value(0.0);
_adj.set_lower(log(SP_DESKTOP_ZOOM_MIN)/log(2.0));
_adj.set_upper(log(SP_DESKTOP_ZOOM_MAX)/log(2.0));
_adj.set_step_increment(0.1);
_adj.set_page_increment(0.1);
set_adjustment(_adj);
}
void
ZoomStatus::update()
{
if (!_dt) return;
_upd_f = true;
set_value(log(_dt->current_zoom())/log(2.0));
_upd_f = false;
}
inline double
value_to_display(double value)
{
return floor(pow(2, value) * 100.0 + 0.5);
}
inline double
display_to_value(double value)
{
return log(value / 100.0) / log(2.0);
}
int
ZoomStatus::on_input(double *new_val)
{
double new_scrolled = get_value();
double new_typed = atof(get_text().c_str());
if (value_to_display(new_scrolled) == new_typed)
{ // the new value is set by scrolling
*new_val = new_scrolled;
} else { // the new value is typed in
*new_val = display_to_value(new_typed);
}
return true;
}
bool
ZoomStatus::on_output()
{
gchar b[64];
g_snprintf(b, 64, "%4.0f%%", value_to_display(get_value()));
set_text(b);
return true;
}
void
ZoomStatus::on_value_changed()
{
if (_upd_f) return;
_upd_f = true;
g_assert(_dt);
double zoom_factor = pow(2, get_value());
Geom::Rect const d = _dt->get_display_area();
_dt->zoom_absolute(d.midpoint()[Geom::X], d.midpoint()[Geom::Y], zoom_factor);
gtk_widget_grab_focus(static_cast<GtkWidget*>((void*)_dt->canvas)); /// \todo this no love song
_upd_f = false;
}
}}}
/*
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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