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Sanel Zukan
459
ede-timedate/EDE_Calendar.cpp
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459
ede-timedate/EDE_Calendar.cpp
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/*
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* $Id$
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*
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* Application for setting system date, time and local timezone
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* Part of Equinox Desktop Environment (EDE).
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* Copyright (c) 2000-2007 EDE Authors.
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*
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* This program is licenced under terms of the
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* GNU General Public Licence version 2 or newer.
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* See COPYING for details.
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*/
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// This is the Calendar widget class inspired by the Calendar originally
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// developed by Alexey Parshin for SPTK and later imported into efltk.
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#include "EDE_Calendar.h"
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#include <FL/Fl.H>
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#include <FL/fl_draw.H>
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#include <edelib/Nls.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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// TODO: replace this with a simple loop when operator++ is implemented in edelib::Date
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long date_distance(edelib::Date da1, edelib::Date da2) {
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if (da1 > da2) {
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edelib::Date tmp = da2;
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da2=da1;
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da1=tmp;
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}
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int d1=da1.day(), m1=da1.month(), y1=da1.year(), d2=da2.day(), m2=da2.month(), y2=da2.year();
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long result=0;
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while (d1!=d2 || m1!=m2 || y1!=y2) {
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result++;
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d1++;
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if (!da1.is_valid(y1,m1,d1)) {
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d1=1;
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m1++;
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if (m1>12) {
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m1=1;
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y1++;
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}
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}
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}
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return result;
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}
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// Constants
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static const char *switchLabels[4] = {
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"@-1<<","@-1<","@-1>","@-1>>"
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};
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static const int monthChanges[4] = {
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-12,-1,1,12
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};
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// TODO: read this from locale
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const bool weekStartsOnMonday = false;
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// Callback function for fwd / back buttons
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void EDE_Calendar::cbSwitchButtonClicked(Fl_Widget *button, long month_change) {
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EDE_Calendar* thecalendar = (EDE_Calendar*)button->parent();
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edelib::Date d = thecalendar->active_date();
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int year = d.year();
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int month = d.month()+month_change;
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int day = d.day();
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// Fix month
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while (month<1) { year--; month+=12; }
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while (month>12) { year++; month-=12; }
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// Switch to closest valid day
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while (day>27 && !d.is_valid(year, month, day)) day--;
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if (d.is_valid(year, month, day)) {
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d.set(year, month, day);
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thecalendar->active_date(d);
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}
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}
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// ctor
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EDE_Calendar::EDE_Calendar(int x,int y,int w,int h,const char *lbl)
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: Fl_Group(x,y,w,h,lbl) {
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unsigned int i;
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// Calendar contents, correct size and position is set by layout()
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// Header box
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m_monthNameBox = new Fl_Box(x,y,w,16);
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m_monthNameBox->box(FL_NO_BOX);
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// Weekday headers
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for (i = 0; i < 7; i++) {
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m_dayNameBoxes[i] = new Fl_Box(x+i*16,y+16,16,16);
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m_dayNameBoxes[i]->box(FL_FLAT_BOX);
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m_dayNameBoxes[i]->color(fl_color_average(color(), FL_GREEN, 0.8));
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// get first two letters of day name
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edelib::Date d;
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d.set(1900,1,7+i); // 1.1.1900 was Monday
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char tmp[3];
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snprintf(tmp,3,"%s", d.day_name());
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m_dayNameBoxes[i]->copy_label(tmp);
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}
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// Fillers (parts of calendar without day buttons)
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for (int i=0; i<3; i++) {
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m_filler[i] = new Fl_Box(x,y,16,16);
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m_filler[i]->box(FL_FLAT_BOX);
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m_filler[i]->color(fl_color_average(color(), FL_BLACK, 0.95)); // very mild grayish
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}
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// Day buttons
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for (i = 0; i < 31; i++) {
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m_dayButtons[i] = new Fl_Box(0,0,16,16);
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char tmp[3];
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snprintf(tmp,3, "%d", (i+1));
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m_dayButtons[i]->copy_label(tmp);
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}
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// Switch buttons
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for (i = 0; i < 4; i++) {
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Fl_Repeat_Button* o;
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m_switchButtons[i] = o = new Fl_Repeat_Button(x,y,16,16,switchLabels[i]);
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o->callback(EDE_Calendar::cbSwitchButtonClicked, (long)monthChanges[i]);
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o->labelcolor(fl_darker(FL_BACKGROUND_COLOR));
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o->selection_color(fl_lighter(FL_BACKGROUND_COLOR));
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}
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end();
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reset(); // this will eventually call layout()
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}
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// Number of rows and columns
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#define CAL_ROWS 9
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#define CAL_COLS 7
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// Calculate positions and sizes of various boxes and buttons
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// NOTE: This method is costly! Avoid calling it unless calendar is actually resized
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void EDE_Calendar::layout(int X, int Y, int W, int H) {
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unsigned int i;
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// Leave some room for edges
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int x_ = X+2;
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int y_ = Y+2;
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int w_ = W-4;
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int h_ = H-4;
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// Precalculate button grid
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// By doing this we try to avoid floating point math while
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// having coords without holes that add up to a desired width
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int bx[CAL_COLS], bw[CAL_COLS], by[CAL_ROWS], bh[CAL_ROWS];
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bx[0] = x_; by[0] = y_;
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for (i=1; i<CAL_COLS; i++) {
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bx[i] = x_ + (w_*i)/CAL_COLS;
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bw[i-1] = bx[i]-bx[i-1];
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}
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bw[CAL_COLS-1] = x_ + w_ - bx[CAL_COLS-1];
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for (i=1; i<CAL_ROWS; i++) {
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by[i] = y_ + (h_*i)/CAL_ROWS;
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bh[i-1] = by[i]-by[i-1];
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}
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bh[CAL_ROWS-1] = y_ + h_ - by[CAL_ROWS-1];
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// Title
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m_monthNameBox->resize( x_,y_,w_, bh[0] );
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// Labels
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for (i=0; i<7; i++)
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m_dayNameBoxes[i]->resize( bx[i], by[1], bw[i], bh[1] );
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// Find first day of week
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edelib::Date d=active_date_;
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d.set(d.year(), d.month(), 1);
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uint day_of_week = d.day_of_week()-1;
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// First filler
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if (day_of_week>0) {
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int k=0;
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for (i=0; i<day_of_week; i++) k += bw[i];
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m_filler[0]->resize( x_, by[2], k, bh[2] );
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}
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// Days
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int row=2;
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for (i=0; i<d.days_in_month(); i++) {
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m_dayButtons[i]->resize( bx[day_of_week], by[row], bw[day_of_week], bh[row] );
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day_of_week++;
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if (day_of_week==7) { day_of_week=0; row++; }
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}
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// Second filler
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if (day_of_week<6) {
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int k=0;
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for (i=day_of_week; i<7; i++) k += bw[i];
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m_filler[1]->resize( bx[day_of_week], by[row], k, bh[row] );
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}
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// Third filler
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if (row<7)
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m_filler[2]->resize( x_, by[7], w_, bh[7] );
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// Switch buttons
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m_switchButtons[0]->resize ( x_, by[8], bw[0], bh[8] );
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m_switchButtons[1]->resize ( bx[1], by[8], bw[1], bh[8] );
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m_switchButtons[2]->resize ( bx[5], by[8], bw[5], bh[8] );
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m_switchButtons[3]->resize ( bx[6], by[8], bw[6], bh[8] );
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}
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// Overloaded resize (used to call layout)
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void EDE_Calendar::resize(int X, int Y, int W, int H) {
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// avoid unnecessary resizing
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static int oldw=0, oldh=0;
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if (W==oldw && H==oldh) return Fl_Group::resize(X,Y,W,H);
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oldw=W; oldh=H;
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layout(X,Y,W,H);
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Fl_Widget::resize(X,Y,W,H); // avoid Fl_Group resizing because we already resized everything
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}
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// Set visual appearance & colors of day buttons and tooltip
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void EDE_Calendar::update_calendar() {
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unsigned int i;
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// Find first day of week
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edelib::Date d=active_date_;
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d.set(d.year(), d.month(), 1);
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int day_of_week = d.day_of_week()-1;
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// Show/hide first filler
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if (day_of_week>0)
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m_filler[0]->show();
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else
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m_filler[0]->hide();
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// Days
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int row=2;
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for (i=0; i<d.days_in_month(); i++) {
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Fl_Box* btn = m_dayButtons[i]; // shortcut
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btn->show();
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// Set button color
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Fl_Color daycolor = color(); // base color is the color of calendar
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if (day_of_week==0) // Special color for sunday
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daycolor = fl_color_average(daycolor, FL_BLUE, 0.8);
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if (i==(uint)today_date_.day()-1 && d.month()==today_date_.month() && d.year()==today_date_.year())
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btn->color(fl_color_average(daycolor, FL_RED, 0.5)); // today
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else if (i==(uint)active_date_.day()-1)
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btn->color(fl_lighter(daycolor));
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else
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btn->color(daycolor);
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// Set downbox for active day
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if (i==(uint)active_date_.day()-1)
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btn->box(FL_DOWN_BOX);
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else
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btn->box(FL_FLAT_BOX);
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day_of_week++;
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if (day_of_week==7) { day_of_week=0; row++; }
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}
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// Hide remaining buttons
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for (i=d.days_in_month(); i<31; i++)
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m_dayButtons[i]->hide();
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// Show/hide second filler
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if (day_of_week<6)
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m_filler[1]->show();
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else
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m_filler[1]->hide();
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// Show/hide third filler
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if (row<7)
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m_filler[2]->show();
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else
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m_filler[2]->hide();
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// Set title
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static char title[30]; // No month name should be larger than 24 chars, even when localized
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// and we can't show it anyway cause the box is too small
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snprintf (title, 30, "%s, %d", d.month_name(), d.year());
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m_monthNameBox->copy_label(title);
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// Calculate tooltip (distance between today and active date)
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static char tooltip_str[1024];
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tooltip_str[0] = '\0';
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if (today_date_ != active_date_) {
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long dist = date_distance(today_date_, active_date_);
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long weeks = dist/7;
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int wdays = dist%7;
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int months=0;
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int mdays=0;
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int years=0;
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int ymonths=0;
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// Find lower date, first part of tooltip
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edelib::Date d1,d2;
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if (today_date_ < active_date_) {
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d1=today_date_;
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d2=active_date_;
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snprintf(tooltip_str, 1023, _("In %ld days"), dist);
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} else {
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d2=today_date_;
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d1=active_date_;
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snprintf(tooltip_str, 1023, _("%ld days ago"), dist);
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}
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// If necessary, calculate distance in m/d and y/m/d format
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if (dist>30) {
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months = d2.month() - d1.month() + (d2.year() - d1.year())*12;
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mdays = d2.day() - d1.day();
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if (mdays<1) {
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mdays += d2.days_in_month();
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months--;
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}
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}
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if (months>11) {
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years = months/12;
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ymonths = months%12;
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}
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// Append those strings using snprintf
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if (weeks) {
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char* tmp = strdup(tooltip_str);
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snprintf(tooltip_str, 1023, _("%s\n%ld weeks and %d days"), tmp, weeks, wdays);
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free(tmp);
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}
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if (months) {
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char* tmp = strdup(tooltip_str);
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snprintf(tooltip_str, 1023, _("%s\n%d months and %d days"), tmp, months, mdays);
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free(tmp);
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}
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if (years) {
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char* tmp = strdup(tooltip_str);
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snprintf(tooltip_str, 1023, _("%s\n%d years, %d months and %d days"), tmp, years, ymonths, mdays);
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free(tmp);
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}
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}
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tooltip(tooltip_str);
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layout(x(),y(),w(),h()); // relayout buttons if neccessary
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redraw();
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}
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int EDE_Calendar::handle(int e) {
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// Forward events to switch buttons
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for (int i=0; i<4; i++)
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if (Fl::event_inside(m_switchButtons[i])) return m_switchButtons[i]->handle(e);
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// Accept focus
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if (e==FL_FOCUS) return 1;
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if (e==FL_PUSH || e==FL_ENTER) return 1;
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// Click on date to set active, doubleclick to set as today
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if (e==FL_RELEASE) {
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for (int i=0; i<31; i++)
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if (Fl::event_inside(m_dayButtons[i])) {
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edelib::Date d = active_date_;
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d.set(d.year(), d.month(), i+1);
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if (Fl::event_clicks() == 1)
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today_date(d);
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else
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active_date(d);
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return 1;
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}
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take_focus();
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} else if (e==FL_KEYBOARD) {
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int k=Fl::event_key();
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// arrow navigation
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if (k==FL_Up || k==FL_Down || k==FL_Left || k==FL_Right) {
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edelib::Date ad = active_date_;
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int d = ad.day();
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int m = ad.month();
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int y = ad.year();
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if (k==FL_Up) d -= 7;
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else if (k==FL_Down) d += 7;
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else if (k==FL_Left) d--;
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else if (k==FL_Right) d++;
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if (d < 1) {
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m--;
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if (m<1) {
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y--;
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m+=12;
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}
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d += ad.days_in_month(y,m);
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}
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if (d > ad.days_in_month(y,m)) {
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d -= ad.days_in_month(y,m);
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m++;
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if (m>12) {
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y++;
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m-=12;
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}
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}
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ad.set(y,m,d);
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active_date(ad);
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return 1;
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}
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// Return to today with Home
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if (k==FL_Home) {
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active_date(today_date());
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return 1;
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}
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// Set active day as today with Space
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if (k==' ') {
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today_date(active_date());
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return 1;
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}
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// Allow moving focus with Tab key
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if (k==FL_Tab) return Fl_Group::handle(e);
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}
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return Fl_Group::handle(e);
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}
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