Engauge Digitizer  2
DigitizeStateSelect.h
1 /******************************************************************************************************
2  * (C) 2014 markummitchell@github.com. This file is part of Engauge Digitizer, which is released *
3  * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *
4  * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission. *
5  ******************************************************************************************************/
6 
7 #ifndef DIGITIZE_STATE_SELECT_H
8 #define DIGITIZE_STATE_SELECT_H
9 
10 #include "DigitizeStateAbstractBase.h"
11 
20 {
21 public:
24  virtual ~DigitizeStateSelect();
25 
26  virtual QString activeCurve () const;
27  virtual void begin(CmdMediator *cmdMediator,
28  DigitizeState previousState);
29  virtual QCursor cursor (CmdMediator *cmdMediator) const;
30  virtual void end();
31  virtual void handleContextMenuEventAxis (CmdMediator *cmdMediator,
32  const QString &pointIdentifier);
33  virtual void handleContextMenuEventGraph (CmdMediator *cmdMediator,
34  const QStringList &pointIdentifiers);
35  virtual void handleCurveChange(CmdMediator *cmdMediator);
36  virtual void handleKeyPress (CmdMediator *cmdMediator,
37  Qt::Key key,
38  bool atLeastOneSelectedItem);
39  virtual void handleMouseMove (CmdMediator *cmdMediator,
40  QPointF posScreen);
41  virtual void handleMousePress (CmdMediator *cmdMediator,
42  QPointF posScreen);
43  virtual void handleMouseRelease (CmdMediator *cmdMediator,
44  QPointF posScreen);
45  virtual QString state() const;
46  virtual void updateAfterPointAddition ();
47  virtual void updateModelDigitizeCurve (CmdMediator *cmdMediator,
48  const DocumentModelDigitizeCurve &modelDigitizeCurve);
49  virtual void updateModelSegments(const DocumentModelSegments &modelSegments);
50 
51 private:
53 
54  void addHoverHighlighting();
55  void keyPressArrow (CmdMediator *cmdMediator,
56  Qt::Key key);
57  QString moveTextFromDeltaScreen (const QPointF &deltaScreen);
58  void removeHoverHighlighting();
59  void setHoverHighlighting(const MainWindowModel &modelMainWindow);
60  double zoomedToUnzoomedScreenX () const;
61  double zoomedToUnzoomedScreenY () const;
62 
63  // Click and drag cases are:
64  // 1) rubber band selection
65  // Result = selection of any items inside the rubber band but no movement
66  // 2) selection and moving with no initially selected items.
67  // Result = selection and movement of item under cursor
68  // 3) selection and moving with only item under cursor initially selected
69  // Result = same result as case #2
70  // 4) selection and moving with item under cursor not initially selected but other item(s) selected
71  // Result = other items get unselected so the result is the same as case #2 but with some items now unselected
72  // 5) selection and moving with item under cursor initially selected along with other selected items
73  // Result = all selected items get moved
74  // Originally, determining if any object was under the cursor during mousePressEvent was done with various hit tests, but
75  // none were 100% consistent with the internal hit test done by the QGraphicsView. The solution was to simply:
76  // 1) Mark all items as unmoved when the mousePressEvent occurs
77  // 2) Mark items that undergo QGraphicsItem::ItemScaleHasChanged as having moved
78  // 3) Harvest the results when the mouseReleaseEvent occurs
79  // All moved items then have the currentCursorPosition - m_movingStart translation applied to them
80  QPointF m_movingStart;
81 };
82 
83 #endif // DIGITIZE_STATE_SELECT_H
virtual void handleKeyPress(CmdMediator *cmdMediator, Qt::Key key, bool atLeastOneSelectedItem)
Handle a key press that was intercepted earlier.
virtual QCursor cursor(CmdMediator *cmdMediator) const
Returns the state-specific cursor shape.
virtual void updateModelSegments(const DocumentModelSegments &modelSegments)
Update the segments given the new settings.
virtual void handleContextMenuEventAxis(CmdMediator *cmdMediator, const QString &pointIdentifier)
Handle a right click, on an axis point, that was intercepted earlier.
virtual void handleCurveChange(CmdMediator *cmdMediator)
Handle the selection of a new curve. At a minimum, DigitizeStateSegment will generate a new set of Se...
virtual void handleMouseRelease(CmdMediator *cmdMediator, QPointF posScreen)
Handle a mouse release that was intercepted earlier.
virtual void handleContextMenuEventGraph(CmdMediator *cmdMediator, const QStringList &pointIdentifiers)
Handle a right click, on a graph point, that was intercepted earlier.
virtual void handleMousePress(CmdMediator *cmdMediator, QPointF posScreen)
Handle a mouse press that was intercepted earlier.
virtual void updateAfterPointAddition()
Update graphics attributes after possible new points. This is useful for highlight opacity...
DigitizeStateContext & context()
Reference to the DigitizeStateContext that contains all the DigitizeStateAbstractBase subclasses...
Model for DlgSettingsDigitizeCurve and CmdSettingsDigitizeCurve.
virtual void begin(CmdMediator *cmdMediator, DigitizeState previousState)
Method that is called at the exact moment a state is entered.
Digitizing state for selecting one or more Points in the Document.
Container for all DigitizeStateAbstractBase subclasses. This functions as the context class in a stan...
Model for DlgSettingsMainWindow.
virtual QString activeCurve() const
Name of the active Curve. This can include AXIS_CURVE_NAME.
virtual void end()
Method that is called at the exact moment a state is exited. Typically called just before begin for t...
virtual void handleMouseMove(CmdMediator *cmdMediator, QPointF posScreen)
Handle a mouse move. This is part of an experiment to see if augmenting the cursor in Point Match mod...
Command queue stack.
Definition: CmdMediator.h:23
Model for DlgSettingsSegments and CmdSettingsSegments.
Base class for all digitizing states. This serves as an interface to DigitizeStateContext.
virtual QString state() const
State name for debugging.
virtual void updateModelDigitizeCurve(CmdMediator *cmdMediator, const DocumentModelDigitizeCurve &modelDigitizeCurve)
Update the digitize curve settings.