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libappfw: Added VariableSliderWidget
Also, SliderWidget's range labels now use the slider's precision.
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| #include "widgets/variablesliderwidget.h" | ||
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doomsday/libappfw/include/de/widgets/variablesliderwidget.h
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| /** @file variablesliderwidget.h Slider that changes a Variable. | ||
| * | ||
| * @authors Copyright (c) 2014 Jaakko Keränen <jaakko.keranen@iki.fi> | ||
| * | ||
| * @par License | ||
| * LGPL: http://www.gnu.org/licenses/lgpl.html | ||
| * | ||
| * <small>This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation; either version 3 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 Lesser | ||
| * General Public License for more details. You should have received a copy of | ||
| * the GNU Lesser General Public License along with this program; if not, see: | ||
| * http://www.gnu.org/licenses</small> | ||
| */ | ||
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| #ifndef LIBAPPFW_VARIABLESLIDERWIDGET_H | ||
| #define LIBAPPFW_VARIABLESLIDERWIDGET_H | ||
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| #include <de/Variable> | ||
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| #include "../SliderWidget" | ||
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| namespace de { | ||
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| /** | ||
| * Widget for changing the value of a Variable using a slider. | ||
| */ | ||
| class LIBAPPFW_PUBLIC VariableSliderWidget : public SliderWidget | ||
| { | ||
| Q_OBJECT | ||
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| public: | ||
| /// Thrown when the variable is gone and someone tries to access it. @ingroup errors | ||
| DENG2_ERROR(VariableMissingError); | ||
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| public: | ||
| VariableSliderWidget(Variable &variable, Ranged const &range, ddouble step = 0, | ||
| String const &name = ""); | ||
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| Variable &variable() const; | ||
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| public slots: | ||
| void updateFromVariable(); | ||
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| protected slots: | ||
| void setVariableFromWidget(); | ||
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| private: | ||
| DENG2_PRIVATE(d) | ||
| }; | ||
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| } // namespace de | ||
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| #endif // LIBAPPFW_VARIABLESLIDERWIDGET_H |
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| @@ -0,0 +1,105 @@ | ||
| /** @file variablesliderwidget.cpp | ||
| * | ||
| * @authors Copyright (c) 2014 Jaakko Keränen <jaakko.keranen@iki.fi> | ||
| * | ||
| * @par License | ||
| * LGPL: http://www.gnu.org/licenses/lgpl.html | ||
| * | ||
| * <small>This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation; either version 3 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 Lesser | ||
| * General Public License for more details. You should have received a copy of | ||
| * the GNU Lesser General Public License along with this program; if not, see: | ||
| * http://www.gnu.org/licenses</small> | ||
| */ | ||
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| #include "de/VariableSliderWidget" | ||
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| #include <de/NumberValue> | ||
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| namespace de { | ||
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| DENG2_PIMPL(VariableSliderWidget) | ||
| , DENG2_OBSERVES(Variable, Deletion) | ||
| , DENG2_OBSERVES(Variable, Change ) | ||
| { | ||
| Variable *var; | ||
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| Instance(Public *i, Variable &variable) : Base(i), var(&variable) | ||
| { | ||
| var->audienceForDeletion() += this; | ||
| var->audienceForChange() += this; | ||
| } | ||
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| ~Instance() | ||
| { | ||
| if(var) | ||
| { | ||
| var->audienceForDeletion() -= this; | ||
| var->audienceForChange() -= this; | ||
| } | ||
| } | ||
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| void updateFromVariable() | ||
| { | ||
| if(!var) return; | ||
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| self.setValue(var->value<NumberValue>().asNumber()); | ||
| } | ||
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| void setVariableFromWidget() | ||
| { | ||
| if(!var) return; | ||
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| var->audienceForChange() -= this; | ||
| var->set(NumberValue(self.value())); | ||
| var->audienceForChange() += this; | ||
| } | ||
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| void variableValueChanged(Variable &, Value const &) | ||
| { | ||
| updateFromVariable(); | ||
| } | ||
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| void variableBeingDeleted(Variable &) | ||
| { | ||
| var = 0; | ||
| self.disable(); | ||
| } | ||
| }; | ||
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| VariableSliderWidget::VariableSliderWidget(Variable &variable, Ranged const &range, | ||
| ddouble step, String const &name) | ||
| : SliderWidget(name), d(new Instance(this, variable)) | ||
| { | ||
| setRange(range, step); | ||
| updateFromVariable(); | ||
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| connect(this, SIGNAL(valueChangedByUser(double)), | ||
| this, SLOT(setVariableFromWidget())); | ||
| } | ||
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| Variable &VariableSliderWidget::variable() const | ||
| { | ||
| if(!d->var) | ||
| { | ||
| throw VariableMissingError("VariableSliderWidget::variable", | ||
| "Widget is not associated with a variable"); | ||
| } | ||
| return *d->var; | ||
| } | ||
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| void VariableSliderWidget::updateFromVariable() | ||
| { | ||
| d->updateFromVariable(); | ||
| } | ||
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| void VariableSliderWidget::setVariableFromWidget() | ||
| { | ||
| d->setVariableFromWidget(); | ||
| } | ||
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| } // namespace de |