* Writes a unique handle and returns it. */

* @return true if there is at least one action in the action stack. */

* Locks/Unlocks this layer. * * @param l true: lock, false: unlock */

calculate the radius of a point in canonical evoluta * whose radius is given. */

Sets the file name of the image. */

* Translates a real coordinate in X to a screen coordinate X. * @param visible Pointer to a boolean which will contain true * after the call if the

* Translates a real coordinate in Y to a screen coordinate Y. */

* Called whenever the mouse position changed. */

--------------------------------------------------------------------------- \brief Add a user defined constant. \param [in] a_sName The name of the

------------------------------------------------------------------------------ \brief Return the address of the callback function assoziated with

--------------------------------------------------------------------------- \brief Virtual function that defines the characters allowed in name identi

* adds a BlockListListener to the list of listeners. Listeners * are notified when the block list changes. */

* Collects list of descendent children (recursively) for given conditions * @param result result of children * @param acceptor condition to check *

* @return Number of loops. */

switch x,y coordinates */

* Recalculates the borders of this entity container including * invisible entities. */

* @return Angle length in rad. */

* Gets the value as double for the given variable. * * @param key Key of the variable. * @param def Default value. * * @return The value for the

* @return The unit the parent graphic works on or None if there's no * parent graphic. */

* @return Users home directory. */

* @return Line type. */

* @return The linear precision for this document. * This is determined by the variable "$LUPREC". */

@return m_maxEntries of files that can be stored in the list at maximum */

* @return Start point of the entity. */

*@ trimCoord, mouse point *@ trimPoint, trim to this intersection point */

whether the entity is circular (circle or arc)

* @return true if the grid is switched on (visible). */

@return true if this is a solid fill. false if it is a pattern hatch. */

* Returns the visibility of the Block in block list */

* Clears all layers, blocks and entities of this graphic. * A default layer (0) is created. */

* Returns parent index for given item * @param index * @return */

* removes a BlockListListener from the list of listeners. */

Dongxu Li's Version, 19 Aug 2011 * scale an ellipse * Find the eigen vectors and eigen values by optimization * original ellipse equation, * x= a

Sets the current attributes for entities. */

Sets new center. */

* Sets the closed flag of this spline. */

* Sets the pointer to the graphic which contains the entities * which are visualized by this widget. */

Sets the current attributes for entities. */

* Sets the layer. If the given pointer points to NULL, the * new layer name will be an empty but valid string. */

* Sets the color of the pixmap next to the "By Layer" item * to the given color. */

* Sets a new paper size. */

* Sets the tangent flag. */

* switch the major/minor axis naming * * \author: Dongxu Li */

* @{description} Update a length string to support fraction * (1 1/2") to (1+1/2") * (1"1/2)