| [2ad1ec] | 1 | /*
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| 2 | * Project: MoleCuilder
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| 3 | * Description: creates and alters molecular systems
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| 4 | * Copyright (C) 2010 University of Bonn. All rights reserved.
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| 5 | * Please see the LICENSE file or "Copyright notice" in builder.cpp for details.
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| 6 | */
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| 7 |
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| 8 | /**
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| 9 | * \file qt-gui.dox
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| 10 | *
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| 11 | * Created on: Jan 5, 2012
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| 12 | * Author: heber
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| 13 | */
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| 14 |
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| 15 | /**
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| 16 | * \page qt-gui Qt GUI
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| 17 | *
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| 18 | * The Qt GUI is the most advanced interface and thus the most complex.
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| 19 | *
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| 20 | * In the following we want to explain some of the details that are involved.
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| 21 | *
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| 22 | * \section qt-gui-qt3d Qt3D and the way to get atoms and bonds displayed
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| 23 | *
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| [eee1b7] | 24 | * Atoms and Bonds have to displayed, the widget for this is GLWorldView. To
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| [2ad1ec] | 25 | * this class belongs GLWorldScene that contains lots of GLMoleculeObject's or
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| [eee1b7] | 26 | * nodes in the speak of Qt3D. We have four derived class for these kind of
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| [2ad1ec] | 27 | * objects:
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| 28 | * -# GLMoleculeObject_atom: for each atom,
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| [eee1b7] | 29 | * -# GLMoleculeObject_bond: for each "side" of the bond (each represents half of
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| 30 | * the bond that join in the middle between the two atoms),
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| 31 | * -# GLMoleculeObject_molecule: for each molecule (shows a box is selected),
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| 32 | * -# GLMoleculeObject_shape: shows the shapes in the ShapeRegistry.
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| [2ad1ec] | 33 | *
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| 34 | * We can only add new nodes to the Qt3D scene at the level of GLWorldScene,
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| 35 | * hence all insertion go through this instance to add new nodes. Destruction
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| 36 | * may occur anywhere as the new nodes are parentized to the scene.
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| 37 | *
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| 38 | * \subsection qt-gui-qt3d-atoms How atom object are constructed/destroyed.
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| 39 | *
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| 40 | * Atoms are rendered as spheres, see createAtom(). GLWorldView gets notified
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| 41 | * by the World about new and removed atoms via the Channel's World::AtomInserted
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| 42 | * and World::AtomRemoved. It translates these into Qt signals with the correct
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| 43 | * affected atom, by looking at
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| 44 | * \code
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| 45 | * const atom *_atom = World::getInstance().lastChanged<atom>();
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| 46 | * \endcode
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| 47 | * These signals call slots of GLWorldScene that has a map of all contained
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| 48 | * GLMoleculeObject, one for either of the two kinds:
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| 49 | * -# GLWorldScene::atomInserted(): create a new node and connect its signals
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| 50 | * with us, add to map
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| 51 | * -# GLWorldScene::atomRemoved(): disconnect, remove from map, destroy
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| 52 | *
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| 53 | * We do not need to destroy the node itself as it is connected via the Observer
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| 54 | * mechanism to the associated atom
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| 55 | *
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| 56 | * \subsection qt-gui-qt3d-bonds How bond object are constructed/destroyed.
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| 57 | *
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| 58 | * Bonds are displayed as cylinders that elongate from one atom to the midpoint
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| 59 | * of the bond (i.e. the spot in between the two atoms). That is we have always
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| 60 | * two cylinders per bond. That's why we need to distinguish
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| 61 | * GLMoleculeObject_bond::SideOfBond to get the right node.
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| 62 | *
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| 63 | * Bonds are not as easy as atoms: The World does not know about bonds being
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| 64 | * created or destroyed, only the atoms themselves know about them.
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| 65 | *
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| 66 | * That's way the atom node object GLMoleculeObject_atom is an Observer of is
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| 67 | * associated atom and listens to the Channel AtomObservable::BondsAdded. It then
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| 68 | * translates this into a Qt signal that calls a slot GLWorldScene:BondInserted.
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| 69 | *
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| 70 | *
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| 71 | * Bonds themselves are also Observables, as are atoms. Hence,
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| 72 | * GLMoleculeObject_bond connect via the Observer mechanism to their associated
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| 73 | * bond and are thus notified when they are destroyed.
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| 74 | *
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| 75 | * Additionally, we use GLWorldScene to do some bookkeeping about all bond nodes.
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| 76 | * This is not strictly required but might in general be useful. Hence, signals
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| [eee1b7] | 77 | * notify GLWorldScene also about GLWorldScene::bondRemoved that are emitted by
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| [2ad1ec] | 78 | * the node itself.
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| 79 | *
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| [eee1b7] | 80 | * \section QtElementList
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| 81 | *
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| 82 | * Lists for each element how often it occures in the world. Selecting an entry
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| 83 | * calls SelectionAtomByElementAction to select all atoms of that particular
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| 84 | * element.
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| 85 | *
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| 86 | * It observes the World and performs a complete refill on any message. To reduce
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| 87 | * performance issues it marks the list as dirty and refills it the next time the
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| 88 | * GUI is idle. This way many successive changes to the world only lead to a
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| 89 | * single refill.
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| 90 | *
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| 91 | * \section QtMoleculeList
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| 92 | *
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| 93 | * Lists all the molecules currently in the world grouped by their formula.
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| 94 | * Selecting an entry calls the SelectionMoleculeByIdAction.
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| 95 | *
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| 96 | * It observes the World the same way QtElementList does.
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| 97 | *
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| 98 | * \section QtShapeController
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| 99 | *
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| 100 | * This is the interface for the ShapeRegistry. It lists all the shapes in the
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| 101 | * registry and lets the user select them. It also features buttons to call
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| 102 | * actions creating and manipulating the selected shapes.
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| 103 | *
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| 104 | * As an Observer it handles the following messages from ShapeRegistry:
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| 105 | * - ShapeRegistry::ShapeInserted
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| 106 | * - ShapeRegistry::ShapeRemoved
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| 107 | * - ShapeRegistry::SelectionChanged
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| 108 | *
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| 109 | * \section QtInfoBox
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| 110 | *
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| [8c9049] | 111 | * Shows information about the atom and molecule the cursor is currently hovering
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| 112 | * over inside the GLWorldView.
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| [eee1b7] | 113 | *
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| [8c9049] | 114 | * GLWorldView emits hoverChanged signals (via QT's signal slot mechanism) which
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| 115 | * the QtInfoBox receives. QtInfoBox then creates its info pages for the atom
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| 116 | * being transmitted as the signal's parameter.
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| [eee1b7] | 117 | *
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| [8c9049] | 118 | * The info pages are Observers for the atom/molecule. When recieving subjectKilled
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| 119 | * they automatically clear the info box.
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| 120 | *
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| 121 | * \date 2013-02-22
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| [2ad1ec] | 122 | */
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