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153 lines
5.8 KiB
153 lines
5.8 KiB
/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* copyright (C) 2006-2007 *
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* Umbrello UML Modeller Authors <uml-devel@uml.sf.net> *
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***************************************************************************/
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#ifndef FLOATINGTEXTWIDGETCONTROLLER_H
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#define FLOATINGTEXTWIDGETCONTROLLER_H
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#include "umlwidgetcontroller.h"
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class FloatingTextWidget;
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/**
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* Controller for FloatingTextWidget.
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*
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* When moving a FloatingTextWidget, it is constrained using constrainTextPos
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* method from the LinkWidget, if any.
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* This applies both when moving as part of a selection and when constraining
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* the move of the selection because it's the receiver of mouse move events.
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* The only exception to this is that when moving the widget, if it's a sequence
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* message and the message widget is selected, the floating text widget isn't
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* moved itself, but automatically by the message widget.
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* If the sequence message wasn't part of the selection, the floating text
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* widget moves it.
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* When moving the floating text as part of a selection, if the position of
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* the floating text is constrained, it's kept at that position until it can
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* be moved to another valid position.
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* No resize is allowed for FloatingTextWidget.
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*
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* @author Umbrello UML Modeller Authors <uml-devel@lists.sourceforge.net>
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*/
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class FloatingTextWidgetController : public UMLWidgetController {
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public:
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/**
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* Constructor for FloatingTextWidgetController.
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*
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* @param floatingTextWidget The floating text widget which uses the controller.
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*/
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FloatingTextWidgetController(FloatingTextWidget *floatingTextWidget);
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/**
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* Destructor for MessageWidgetController.
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*/
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~FloatingTextWidgetController();
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protected:
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/**
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* Overridden from UMLWidgetController.
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* Saves the values of the widget needed for move/resize.
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* Calls parent method and then saves the value of m_unconstrainedPositionX/Y
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* and m_movementDirectionX/Y.
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*
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* @param me The TQMouseEvent to get the offset from.
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*/
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virtual void saveWidgetValues(TQMouseEvent *me);
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/**
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* Overridden from UMLWidgetController.
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* FloatingTextWidgets can't be resized, so this method always returns false.
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* Cursor isn't changed.
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*
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* @param me The TQMouseEVent to check.
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* @return true if the mouse is in resize area, false otherwise.
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*/
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virtual bool isInResizeArea(TQMouseEvent *me);
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/**
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* Overridden from UMLWidgetController.
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* Moves the widget to a new position using the difference between the
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* current position and the new position.
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* If the floating text widget is part of a sequence message, and the
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* message widget is selected, it does nothing: the message widget will
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* update the text position when it's moved.
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* In any other case, the floating text widget constrains its move using
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* constrainPosition. When the position of the floating text is constrained,
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* it's kept at that position until it can be moved to another valid
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* position (m_unconstrainedPositionX/Y and m_movementDirectionX/Y are
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* used for that).
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* Moreover, if is part of a sequence message (and the message widget
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* isn't selected), it updates the position of the message widget.
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* @see constrainPosition
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*
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* @param diffX The difference between current X position and new X position.
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* @param diffY The difference between current Y position and new Y position.
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*/
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virtual void moveWidgetBy(int diffX, int diffY);
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/**
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* Overridden from UMLWidgetController.
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* Modifies the value of the diffX and diffY variables used to move the
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* widgets.
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* The values are constrained using constrainPosition.
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* @see constrainPosition
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*
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* @param diffX The difference between current X position and new X position.
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* @param diffY The difference between current Y position and new Y position.
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*/
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virtual void constrainMovementForAllWidgets(int &diffX, int &diffY);
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private:
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/**
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* Returns a constrained position for the widget after applying the position
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* difference.
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* If no link widget exists, the position returned is the current widget
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* position with the difference applied. If there's a link, the position
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* to be returned is constrained using constrainTextPos method from the
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* LinkWidget, if any.
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*
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* @param diffX The difference between current X position and new X position.
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* @param diffY The difference between current Y position and new Y position.
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* @return A TQPoint with the constrained new position.
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*/
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TQPoint constrainPosition(int diffX, int diffY);
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/**
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* The floating text widget which uses the controller.
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*/
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FloatingTextWidget *m_floatingTextWidget;
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/**
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* The horizontal position the widget would have if its move wasn't constrained.
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*/
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int m_unconstrainedPositionX;
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/**
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* The vertical position the widget would have if its move wasn't constrained.
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*/
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int m_unconstrainedPositionY;
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/**
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* The X direction the widget was moved when the constrain was applied.
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* -1 means left, 1 means right.
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*/
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int m_movementDirectionX;
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/**
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* The Y direction the widget was moved when the constrain was applied.
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* -1 means up, 1 means down.
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*/
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int m_movementDirectionY;
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};
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#endif
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