1 files changed, 308 insertions, 0 deletions

diff --git a/korganizer/kodaymatrix.h b/korganizer/kodaymatrix.h
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+/*
+    This file is part of KOrganizer.
+    Copyright (c) 2001 Eitzenberger Thomas <thomas.eitzenberger@siemens.at>
+
+    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.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+    As a special exception, permission is given to link this program
+    with any edition of Qt, and distribute the resulting executable,
+    without including the source code for Qt in the source distribution.
+*/
+#ifndef _KODAYMAT_H
+#define _KODAYMAT_H
+
+#include <libkcal/calendar.h>
+
+#include <qstring.h>
+#include <qframe.h>
+#include <qcolor.h>
+#include <qpen.h>
+#include <qdatetime.h>
+#include <qtooltip.h>
+
+#include <qmap.h>
+
+class QDragEnterEvent;
+class QDragMoveEvent;
+class QDragLeaveEvent;
+class QDropEvent;
+
+class KODayMatrix;
+
+using namespace KCal;
+
+
+/**
+ *  small helper class to dynamically show tooltips inside the day matrix.
+ *  This class asks the day matrix object for a appropriate label which
+ *  is in our special case the name of the holiday or null if this day is no holiday.
+ */
+class DynamicTip : public QToolTip
+{
+public:
+
+    /**
+     * Constructor that expects a KODayMatrix object as parent.
+     *
+     * @param parent the parent KODayMatrix control.
+     */
+    DynamicTip(QWidget* parent );
+
+protected:
+
+    /**
+     * Qt's callback to ask the object to provide an approrpiate text for the
+     * tooltip to be shown.
+     *
+     * @param pos coordinates of the mouse.
+     */
+    void maybeTip( const QPoint & pos);
+
+private:
+
+    /** the parent control this tooltip is designed for. */
+    KODayMatrix* matrix;
+};
+
+/**
+ *  replacement for kdpdatebuton.cpp that used 42 widgets for the day matrix to be displayed.
+ *  Cornelius thought this was a waste of memory and a lot of overhead.
+ *  In addition the selection was not very intuitive so I decided to rewrite it using a QFrame
+ *  that draws the labels and allows for dragging selection while maintaining nearly full
+ *  compatibility in behaviour with its predecessor.
+ *
+ *  The following functionality has been changed:
+ *
+ *  o when shifting events in the agenda view from one day to another the day matrix is updated now
+ *  o TODO ET dragging an event to the matrix will MOVE not COPY the event to the new date.
+ *  o no support for Ctrl+click to create groups of dates
+ *    (This has not really been supported in the predecessor. It was not very intuitive nor was it
+ *     user friendly.)
+ *    This feature has been replaced with dragging a selection on the matrix. The matrix will
+ *    automatically choose the appropriate selection (e.g. you are not any longer able to select
+ *    two distinct groups of date selections as in the old class)
+ *  o now that you can select more then a week it can happen that not all selected days are
+ *    displayed in the matrix. However this is preferred to the alternative which would mean to
+ *    adjust the selection and leave some days undisplayed while scrolling through the months
+ *
+ *  @short day matrix widget of the KDateNavigator
+ *
+ *  @author Eitzenberger Thomas
+ */
+class KODayMatrix: public QFrame {
+
+    Q_OBJECT
+
+public:
+
+    /** constructor to create a day matrix widget.
+     *
+     *  @param parent widget that is the parent of the day matrix. Normally this should
+     *                be a KDateNavigator
+     *  @param calendar instance of a calendar on which all calculations are based
+     *  @param date start date of the matrix (is expected to be already fixed). It is
+     *              assumed that this date is the first week day to be shown in the matrix.
+     *  @param name name of the widget
+     */
+    KODayMatrix(QWidget *parent, Calendar* calendar, QDate date, const char *name );
+
+    /** destructor that deallocates all dynamically allocated private members.
+     */
+    ~KODayMatrix();
+
+    /** updates the day matrix to start with the given date. Does all the necessary
+     *  checks for holidays or events on a day and stores them for display later on.
+     *  Does NOT update the view visually. Call repaint() for this.
+     *
+     *  @param actdate recalculates the day matrix to show NUMDAYS starting from this
+     *                 date.
+     */
+    void updateView(QDate actdate);
+
+    /** returns the QDate object associated with day indexed by the
+     *  supplied offset.
+     */
+    const QDate& getDate(int offset);
+
+    /** returns the official name of this holy day or 0 if there is no label
+     *  for this day.
+     */
+    QString getHolidayLabel(int offset);
+
+    /** adds all actual selected days from mSelStart to mSelEnd to the supplied
+     *  DateList.
+     */
+    void addSelectedDaysTo(DateList&);
+
+    /** sets the actual to be displayed selection in the day matrix starting from
+     *  start and ending with end. Theview must be manually updated by calling
+     *  repaint. (?)
+     */
+    void setSelectedDaysFrom(const QDate& start, const QDate& end);
+
+
+    /** Is today visible in the view? Keep this in sync with
+    * the values today (below) can take.
+    */
+    bool isTodayVisible() const { return today>=0; } ;
+    
+    /** If today is visible, then we can find out if today is 
+    * near the beginning or the end of the month.
+    * This is dependent on today remaining the index
+    * in the array of visible dates and going from
+    * top left (0) to bottom right (41).
+    */
+    bool isBeginningOfMonth() const { return today<=8; } ;
+    bool isEndOfMonth() const { return today>=27; } ;
+        
+public slots:
+    /** Recalculates all the flags of the days in the matrix like holidays or events
+     *  on a day (Actually calls above method with the actual startdate).
+     */
+    void updateView();
+
+    /**
+    * Calculate which square in the matrix should be 
+    * hilighted to indicate it's today.
+    */
+    void recalculateToday();
+    
+/*
+    void setStartDate(QDate);
+*/
+
+signals:
+
+    /** emitted if the user selects a block of days with the mouse by dragging a rectangle
+     *  inside the matrix
+     *
+     *  @param daylist list of days that have been selected by the user
+     */
+    void selected( const KCal::DateList &daylist );
+
+    /** emitted if the user has dropped an event inside the matrix
+     *
+     *  @param event the dropped calendar event
+     */
+    void eventDropped(Event *event);
+
+protected:
+
+    void paintEvent(QPaintEvent *ev);
+
+    void mousePressEvent (QMouseEvent* e);
+
+    void mouseReleaseEvent (QMouseEvent* e);
+
+    void mouseMoveEvent (QMouseEvent* e);
+
+    void dragEnterEvent(QDragEnterEvent *);
+
+    void dragMoveEvent(QDragMoveEvent *);
+
+    void dragLeaveEvent(QDragLeaveEvent *);
+
+    void dropEvent(QDropEvent *);
+
+    void resizeEvent(QResizeEvent *);
+
+private:
+
+    /** returns the index of the day located at the matrix's widget (x,y) position.
+     *
+     *  @param x horizontal coordinate
+     *  @param y vertical coordinate
+     */
+    int getDayIndexFrom(int x, int y);
+
+    /** calculates a "shaded" color from the supplied color object.
+     *  (Copied from Cornelius's kdpdatebutton.cpp)
+     *
+     *  @param color source based on which a shaded color should be calculated.
+     */
+    QColor getShadedColor(QColor color);
+
+    /** number of days to be displayed. For now there is no support for any other number then 42.
+        so change it at your own risk :o) */
+    static const int NUMDAYS;
+
+    /** calendar instance to be queried for holidays, events, ... */
+    Calendar  *mCalendar;
+
+    /** starting date of the matrix */
+    QDate     startdate;
+
+    /** array of day labels to optimeize drawing performance. */
+    QString   *daylbls;
+
+    /** array of days displayed to reduce memory consumption by
+        subsequently calling QDate::addDays(). */
+    QDate     *days;
+
+    /** array of storing the number of events on a given day.
+      *  used for drawing a bold font if there is at least one event on that day.
+      */
+    int      *events;
+
+    /** stores holiday names of the days shown in the matrix. */
+    QMap<int,QString>  mHolidays;
+
+    /** indey of today or -1 if today is not visible in the matrix. */
+    int       today;
+
+    /** index of day where dragged selection was initiated.
+        used to detect "negative" timely selections */
+    int       mSelInit;
+
+    /** if mSelStart has this value it indicates that there is no
+        actual selection in the matrix. */
+    static const int NOSELECTION;
+
+    /** index of first selected day. */
+    int       mSelStart;
+
+    /** index of last selected day. */
+    int       mSelEnd;
+
+    /** dynamic tooltip to handle mouse dependent tips for each day in the matrix. */
+    DynamicTip* mToolTip;
+
+
+    /** default background colour of the matrix. */
+    QColor    mDefaultBackColor;
+
+    /** default text color of the matrix. */
+    QColor    mDefaultTextColor;
+
+    /** default text color for days not in the actual month. */
+    QColor    mDefaultTextColorShaded;
+
+    /** default text color for holidays not in the actual month. */
+    QColor    mHolidayColorShaded;
+
+    /** text color for selected days. */
+    QColor    mSelectedDaysColor;
+
+    /** default width of the frame drawn around today if it is visible in the matrix. */
+    int       mTodayMarginWidth;
+
+    /** stores actual size of each day in the widget so that I dont need to ask this data
+     *  on every repaint.
+     */
+    QRect     daysize;
+
+};
+
+#endif