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textwidget.cpp
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textwidget.cpp
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/** @file textwidget.cpp Generic widget with a text-based visual.
*
* @authors Copyright © 2013 Jaakko Keränen <jaakko.keranen@iki.fi>
*
* @par License
* GPL: http://www.gnu.org/licenses/gpl.html
*
* <small>This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. This program 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 General
* Public License for more details. You should have received a copy of the GNU
* General Public License along with this program; if not, see:
* http://www.gnu.org/licenses</small>
*/
#include "de/shell/TextWidget"
#include "de/shell/TextRootWidget"
#include "de/shell/Action"
#include <QList>
namespace de {
namespace shell {
struct TextWidget::Instance
{
TextCanvas *canvas;
RuleRectangle *rule;
QList<Action *> actions;
Instance() : canvas(0), rule(new RuleRectangle)
{}
~Instance()
{
delete rule;
foreach(Action *act, actions) delete act;
}
};
TextWidget::TextWidget(String const &name) : Widget(name), d(new Instance)
{}
TextWidget::~TextWidget()
{
delete d;
}
TextRootWidget &TextWidget::root() const
{
TextRootWidget *r = dynamic_cast<TextRootWidget *>(&Widget::root());
DENG2_ASSERT(r != 0);
return *r;
}
void TextWidget::setTargetCanvas(TextCanvas *canvas)
{
d->canvas = canvas;
}
TextCanvas &TextWidget::targetCanvas() const
{
if(!d->canvas)
{
// A specific target not defined, use the root canvas.
return root().rootCanvas();
}
return *d->canvas;
}
void TextWidget::redraw()
{
if(hasRoot()) root().requestDraw();
}
void TextWidget::drawAndShow()
{
if(!isHidden())
{
draw();
notifyTree(&Widget::drawIfVisible);
targetCanvas().show();
}
}
RuleRectangle &TextWidget::rule()
{
DENG2_ASSERT(d->rule != 0);
return *d->rule;
}
RuleRectangle const &TextWidget::rule() const
{
DENG2_ASSERT(d->rule != 0);
return *d->rule;
}
Vector2i TextWidget::cursorPosition() const
{
return Vector2i(floor(rule().left().value()),
floor(rule().top().value()));
}
void TextWidget::addAction(Action *action)
{
d->actions.append(action);
}
void TextWidget::removeAction(Action &action)
{
d->actions.removeAll(&action);
}
bool TextWidget::handleEvent(Event const *event)
{
// We only support KeyEvents.
if(event->type() == Event::KeyPress)
{
DENG2_ASSERT(dynamic_cast<KeyEvent const *>(event) != 0);
KeyEvent const *keyEvent = static_cast<KeyEvent const *>(event);
foreach(Action *act, d->actions)
{
// Event will be used by actions.
if(act->tryTrigger(*keyEvent)) return true;
}
// Focus navigation.
if(keyEvent->key() == Qt::Key_Tab && hasFocus() && !focusNext().isEmpty())
{
Widget *next = root().find(focusNext());
if(next)
{
root().setFocus(next);
root().requestDraw();
return true;
}
}
}
return Widget::handleEvent(event);
}
} // namespace shell
} // namespace de