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/**
* SpinButton widget, that allows entry of both '.' and ',' for the decimal, even when in numeric mode.
*/
/*
* Author:
* Johan B. C. Engelen
*
* Copyright (C) 2011 Author
*
* Released under GNU GPL. Read the file 'COPYING' for more information.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "spinbutton.h"
#include "unit-menu.h"
#include "util/expression-evaluator.h"
#include "event-context.h"
namespace Inkscape {
namespace UI {
namespace Widget {
void
SpinButton::connect_signals() {
signal_input().connect(sigc::mem_fun(*this, &SpinButton::on_input));
signal_focus_in_event().connect(sigc::mem_fun(*this, &SpinButton::on_my_focus_in_event));
signal_key_press_event().connect(sigc::mem_fun(*this, &SpinButton::on_my_key_press_event));
};
/**
* This callback function should try to convert the entered text to a number and write it to newvalue.
* It calls a method to evaluate the (potential) mathematical expression.
*
* @retval false No conversion done, continue with default handler.
* @retval true Conversion successful, don't call default handler.
*/
int
SpinButton::on_input(double* newvalue)
{
try {
Inkscape::Util::GimpEevlQuantity result;
if (_unit_menu) {
Unit unit = _unit_menu->getUnit();
result = Inkscape::Util::gimp_eevl_evaluate (get_text().c_str(), &unit);
// check if output dimension corresponds to input unit
if (result.dimension != (unit.isAbsolute() ? 1 : 0) ) {
throw Inkscape::Util::EvaluatorException("Input dimensions do not match with parameter dimensions.","");
}
} else {
result = Inkscape::Util::gimp_eevl_evaluate (get_text().c_str(), NULL);
}
*newvalue = result.value;
}
catch(Inkscape::Util::EvaluatorException &e) {
g_message ("%s", e.what());
return false;
}
return true;
}
/** When focus is obtained, save the value to enable undo later.
* @retval false continue with default handler.
* @retval true don't call default handler.
*/
bool
SpinButton::on_my_focus_in_event(GdkEventFocus* /*event*/)
{
on_focus_in_value = get_value();
return false; // do not consume the event
}
/** Handle specific keypress events, like Ctrl+Z
* @retval false continue with default handler.
* @retval true don't call default handler.
*/
bool
SpinButton::on_my_key_press_event(GdkEventKey* event)
{
switch (get_group0_keyval (event)) {
case GDK_Escape:
undo();
return true; // I consumed the event
break;
case GDK_z:
case GDK_Z:
if (event->state & GDK_CONTROL_MASK) {
undo();
return true; // I consumed the event
}
break;
default:
break;
}
return false; // do not consume the event
}
/**
* Undo the editing, by resetting the value upon when the spinbutton got focus.
*/
void
SpinButton::undo()
{
set_value(on_focus_in_value);
}
} // namespace Widget
} // namespace UI
} // namespace Inkscape
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=c++:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
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