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#include "DragManipulator.h"
#include "selection/SelectionPool.h"
#include "selection/SelectionTestWalkers.h"
#include "selection/algorithm/Planes.h"
namespace selection
{
namespace
{
// Predicate function used to pick selectable Sectables only when drag-manipulating
bool filterSelectedItemsOnly(ISelectable* selectable)
{
return selectable->isSelected();
}
}
DragManipulator::DragManipulator(ManipulationPivot& pivot, SelectionSystem& selectionSystem, ISceneSelectionTesterFactory& factory) :
_pivot(pivot),
_selectionSystem(selectionSystem),
_testerFactory(factory),
_freeResizeComponent(_resizeTranslatable),
_resizeModeActive(false),
_freeDragComponent(_dragTranslatable),
_dragTranslatable(SelectionTranslator::TranslationCallback())
{}
DragManipulator::Type DragManipulator::getType() const
{
return Drag;
}
DragManipulator::Component* DragManipulator::getActiveComponent()
{
return _dragSelectable.isSelected() ? &_freeDragComponent : &_freeResizeComponent;
}
void DragManipulator::testSelect(SelectionTest& test, const Matrix4& pivot2world)
{
_resizeModeActive = false;
// No drag manipulation in merge mode
if (_selectionSystem.getSelectionMode() == SelectionMode::MergeAction) return;
SelectionPool selector;
switch (_selectionSystem.getSelectionMode())
{
case SelectionMode::Primitive:
testSelectPrimitiveMode(test.getVolume(), test, selector);
break;
case SelectionMode::GroupPart:
testSelectGroupPartMode(test.getVolume(), test, selector);
break;
case SelectionMode::Entity:
testSelectEntityMode(test.getVolume(), test, selector);
break;
case SelectionMode::Component:
testSelectComponentMode(test.getVolume(), test, selector);
break;
default:
return;
};
for (auto& [_, selectable] : selector)
{
selectable->setSelected(true);
}
}
bool DragManipulator::testSelectedItemsInScene(SelectionMode mode, const VolumeTest& view, SelectionTest& test)
{
auto tester = _testerFactory.createSceneSelectionTester(mode);
tester->testSelectSceneWithFilter(view, test, filterSelectedItemsOnly);
return tester->hasSelectables();
}
void DragManipulator::testSelectPrimitiveMode(const VolumeTest& view, SelectionTest& test, SelectionPool& selector)
{
// If testing for entities and worldspawn primitives fails check for group children too
if (testSelectedItemsInScene(SelectionMode::Primitive, view, test) ||
testSelectedItemsInScene(SelectionMode::GroupPart, view, test))
{
selector.addSelectable(SelectionIntersection(0, 0), &_dragSelectable);
return;
}
// all direct hits failed, check for drag-selectable faces
_resizeModeActive = algorithm::testSelectPlanes(selector, test);
}
void DragManipulator::testSelectGroupPartMode(const VolumeTest& view, SelectionTest& test, SelectionPool& selector)
{
// Find all non-worldspawn child primitives that are selectable
if (testSelectedItemsInScene(SelectionMode::GroupPart, view, test))
{
// Found a selectable primitive
selector.addSelectable(SelectionIntersection(0, 0), &_dragSelectable);
return;
}
// Check for selectable faces
_resizeModeActive = algorithm::testSelectPlanes(selector, test);
}
void DragManipulator::testSelectEntityMode(const VolumeTest& view, SelectionTest& test, SelectionPool& selector)
{
// Check, if an entity could be found
if (testSelectedItemsInScene(SelectionMode::Entity, view, test))
{
selector.addSelectable(SelectionIntersection(0, 0), &_dragSelectable);
return;
}
// Check for selectable faces
_resizeModeActive = algorithm::testSelectPlanes(selector, test);
}
void DragManipulator::testSelectComponentMode(const VolumeTest& view, SelectionTest& test, SelectionPool& selector)
{
auto tester = _testerFactory.createSceneSelectionTester(SelectionMode::Component);
tester->testSelectScene(view, test); // don't restrict drag-selecting to selected components
tester->foreachSelectable([&](auto selectable)
{
// greebo: Transient component selection: clicking an unselected
// component will deselect all previously selected components beforehand
if (!selectable->isSelected())
{
_selectionSystem.setSelectedAllComponents(false);
}
selector.addSelectable(SelectionIntersection(0, 0), selectable);
_dragSelectable.setSelected(true);
});
}
void DragManipulator::setSelected(bool select)
{
_resizeModeActive = select;
_dragSelectable.setSelected(select);
}
bool DragManipulator::isSelected() const
{
return _resizeModeActive || _dragSelectable.isSelected();
}
}
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