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Diffstat (limited to 'umbrello/umbrello/floatingtextwidgetcontroller.h')
| -rw-r--r-- | umbrello/umbrello/floatingtextwidgetcontroller.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/umbrello/umbrello/floatingtextwidgetcontroller.h b/umbrello/umbrello/floatingtextwidgetcontroller.h new file mode 100644 index 00000000..f73b359a --- /dev/null +++ b/umbrello/umbrello/floatingtextwidgetcontroller.h @@ -0,0 +1,152 @@ +/*************************************************************************** + * * + * 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. * + * * + * copyright (C) 2006-2007 * + * Umbrello UML Modeller Authors <uml-devel@uml.sf.net> * + ***************************************************************************/ + +#ifndef FLOATINGTEXTWIDGETCONTROLLER_H +#define FLOATINGTEXTWIDGETCONTROLLER_H + +#include "umlwidgetcontroller.h" + +class FloatingTextWidget; + +/** + * Controller for FloatingTextWidget. + * + * When moving a FloatingTextWidget, it is constrained using constrainTextPos + * method from the LinkWidget, if any. + * This applies both when moving as part of a selection and when constraining + * the move of the selection because it's the receiver of mouse move events. + * The only exception to this is that when moving the widget, if it's a sequence + * message and the message widget is selected, the floating text widget isn't + * moved itself, but automatically by the message widget. + * If the sequence message wasn't part of the selection, the floating text + * widget moves it. + * When moving the floating text as part of a selection, if the position of + * the floating text is constrained, it's kept at that position until it can + * be moved to another valid position. + * No resize is allowed for FloatingTextWidget. + * + * @author Umbrello UML Modeller Authors <uml-devel@lists.sourceforge.net> + */ +class FloatingTextWidgetController : public UMLWidgetController { +public: + + /** + * Constructor for FloatingTextWidgetController. + * + * @param floatingTextWidget The floating text widget which uses the controller. + */ + FloatingTextWidgetController(FloatingTextWidget *floatingTextWidget); + + /** + * Destructor for MessageWidgetController. + */ + ~FloatingTextWidgetController(); + +protected: + + /** + * Overridden from UMLWidgetController. + * Saves the values of the widget needed for move/resize. + * Calls parent method and then saves the value of m_unconstrainedPositionX/Y + * and m_movementDirectionX/Y. + * + * @param me The QMouseEvent to get the offset from. + */ + virtual void saveWidgetValues(QMouseEvent *me); + + /** + * Overridden from UMLWidgetController. + * FloatingTextWidgets can't be resized, so this method always returns false. + * Cursor isn't changed. + * + * @param me The QMouseEVent to check. + * @return true if the mouse is in resize area, false otherwise. + */ + virtual bool isInResizeArea(QMouseEvent *me); + + /** + * Overridden from UMLWidgetController. + * Moves the widget to a new position using the difference between the + * current position and the new position. + * If the floating text widget is part of a sequence message, and the + * message widget is selected, it does nothing: the message widget will + * update the text position when it's moved. + * In any other case, the floating text widget constrains its move using + * constrainPosition. When the position of the floating text is constrained, + * it's kept at that position until it can be moved to another valid + * position (m_unconstrainedPositionX/Y and m_movementDirectionX/Y are + * used for that). + * Moreover, if is part of a sequence message (and the message widget + * isn't selected), it updates the position of the message widget. + * @see constrainPosition + * + * @param diffX The difference between current X position and new X position. + * @param diffY The difference between current Y position and new Y position. + */ + virtual void moveWidgetBy(int diffX, int diffY); + + /** + * Overridden from UMLWidgetController. + * Modifies the value of the diffX and diffY variables used to move the + * widgets. + * The values are constrained using constrainPosition. + * @see constrainPosition + * + * @param diffX The difference between current X position and new X position. + * @param diffY The difference between current Y position and new Y position. + */ + virtual void constrainMovementForAllWidgets(int &diffX, int &diffY); + +private: + + /** + * Returns a constrained position for the widget after applying the position + * difference. + * If no link widget exists, the position returned is the current widget + * position with the difference applied. If there's a link, the position + * to be returned is constrained using constrainTextPos method from the + * LinkWidget, if any. + * + * @param diffX The difference between current X position and new X position. + * @param diffY The difference between current Y position and new Y position. + * @return A QPoint with the constrained new position. + */ + QPoint constrainPosition(int diffX, int diffY); + + /** + * The floating text widget which uses the controller. + */ + FloatingTextWidget *m_floatingTextWidget; + + /** + * The horizontal position the widget would have if its move wasn't constrained. + */ + int m_unconstrainedPositionX; + + /** + * The vertical position the widget would have if its move wasn't constrained. + */ + int m_unconstrainedPositionY; + + /** + * The X direction the widget was moved when the constrain was applied. + * -1 means left, 1 means right. + */ + int m_movementDirectionX; + + /** + * The Y direction the widget was moved when the constrain was applied. + * -1 means up, 1 means down. + */ + int m_movementDirectionY; +}; + +#endif |