//

// "$Id: table-with-keynav.cxx 9848 2013-03-25 23:20:29Z greg.ercolano $"

//

//    Example of Fl_Table with keyboard selection navigation - Greg Ercolano 04/14/2012

//

//    Display a 10x10 multiplication table, and allow the user to

//    make cell or row selections (with mouse or keyboard navigation)

//    to select areas of the table, and show the sum of the cell's values.

//

//    Started with the "testkeyboardnav.cxx" example from the original

//    Fl_Table project, using Jean-Marc Lienher's additions for keyboard nav.

//

// Copyright 2003, 2012 Greg Ercolano.

// Copyright 2004 Jean-Marc Lienher

// Copyright 1998-2010 by Bill Spitzak and others.

//

// This library is free software. Distribution and use rights are outlined in

// the file "COPYING" which should have been included with this file.  If this

// file is missing or damaged, see the license at:

//

//     http://www.fltk.org/COPYING.php

//

// Please report all bugs and problems on the following page:

//

//     http://www.fltk.org/str.php

//

#include <FL/Fl.H>

#include <FL/fl_draw.H>

#include <FL/Fl_Double_Window.H>

#include <FL/Fl_Toggle_Button.H>

#include <FL/Fl_Output.H>

#include <FL/Fl_Table_Row.H>

#include <FL/names.h>

#include <stdio.h>

#include <stdlib.h>

// GLOBALS

class MyTable;

Fl_Toggle_Button *G_rowselect = 0;		// toggle to enable row selection

MyTable          *G_table = 0;			// table widget

Fl_Output        *G_sum = 0;			// displays sum of user's selection

class MyTable : public Fl_Table_Row {

protected:

    // Handle drawing all cells in table

    void draw_cell(TableContext context, int R=0,int C=0, int X=0,int Y=0,int W=0,int H=0) {

	static char s[30]; 

	switch ( context ) {

	    case CONTEXT_COL_HEADER:

	    case CONTEXT_ROW_HEADER:

		fl_font(FL_HELVETICA | FL_BOLD, 14);

		fl_push_clip(X, Y, W, H);

		{

		    Fl_Color c = (context==CONTEXT_COL_HEADER) ? col_header_color() : row_header_color();

		    fl_draw_box(FL_THIN_UP_BOX, X, Y, W, H, c);

		    fl_color(FL_BLACK);

		    // Draw text for headers

		    sprintf(s, "%d", (context == CONTEXT_COL_HEADER) ? C : R);

		    fl_draw(s, X, Y, W, H, FL_ALIGN_CENTER);

		}

		fl_pop_clip();

		return;

	    case CONTEXT_CELL: {

		// Keyboard nav and mouse selection highlighting

		int selected = G_rowselect->value() ? row_selected(R) : is_selected(R,C);

		fl_draw_box(FL_THIN_UP_BOX, X, Y, W, H, selected ? FL_YELLOW : FL_WHITE);

		// Draw text for the cell

		fl_push_clip(X+3, Y+3, W-6, H-6);

		{

		    fl_font(FL_HELVETICA, 14);

		    fl_color(FL_BLACK); 

		    sprintf(s, "%d", R*C);		// factor row + col for data cells

		    fl_draw(s, X+3, Y+3, W-6, H-6, FL_ALIGN_RIGHT);

		}

		fl_pop_clip();

		return;

	    }

	    default:

		return;

	}

    }

public:

    // CTOR

    MyTable(int x, int y, int w, int h, const char *l=0) : Fl_Table_Row(x,y,w,h,l) {

	// Row init

	row_header(1);

	row_header_width(70);

	row_resize(1);

	rows(11);

	row_height_all(20);

	// Col init

	col_header(1);

	col_header_height(20);

	col_resize(1);

	cols(11);

	col_width_all(70);

	end();			// Fl_Table derives from Fl_Group, so end() it

    }

    ~MyTable() { }

    // Update the displayed sum value

    int GetSelectionSum() {

        int sum = -1;

        for ( int R=0; R

	    for ( int C=0; C

	        if ( G_rowselect->value() ? row_selected(R) : is_selected(R,C) ) {

		    if ( sum == -1 ) sum = 0;

		    sum += R*C;

		}

	    }

	}

	return(sum);

    }

    // Update the "Selection sum:" display

    void UpdateSum() {

	static char s[80];

	int sum = GetSelectionSum();

	if ( sum == -1 ) { sprintf(s, "(nothing selected)"); G_sum->color(48); }

	else             { sprintf(s, "%d", sum); G_sum->color(FL_WHITE); }

	// Update only if different (lets one copy/paste from sum)

	if ( strcmp(s,G_sum->value()))

	    { G_sum->value(s); G_sum->redraw(); }

    }

    // Keyboard and mouse events

    int handle(int e) {

        int ret = Fl_Table_Row::handle(e);

	if ( e == FL_KEYBOARD && Fl::event_key() == FL_Escape ) exit(0);

        switch (e) {

	    case FL_PUSH:

	    case FL_RELEASE:

	    case FL_KEYUP:

	    case FL_KEYDOWN:

	    case FL_DRAG: {

		//ret = 1;		// *don't* indicate we 'handled' these, just update ('handling' prevents e.g. tab nav)

	        UpdateSum();

		redraw();

		break;

	    }

	    case FL_FOCUS:		// tells FLTK we're interested in keyboard events

	    case FL_UNFOCUS:

	        ret = 1;

		break;

	}

	return(ret);

    }

};

// User changed the 'row select' toggle button

void RowSelect_CB(Fl_Widget *w, void*) {

    w->window()->redraw();		// redraw with changes applied

    G_table->UpdateSum();

}

int main() {

    Fl::option(Fl::OPTION_ARROW_FOCUS, 0);		// disable arrow focus nav (we want arrows to control cells)

    Fl_Double_Window win(862, 312, "table-with-keynav");

    win.begin();

	// Create table

	G_table = new MyTable(10, 30, win.w()-20, win.h()-70, "Times Table");

	G_table->tooltip("Use mouse or Shift + Arrow Keys to make selections.\n"

		         "Sum of selected values is shown.");

	// Row select toggle button

	G_rowselect = new Fl_Toggle_Button(140,10,12,12,"Row selection");

	G_rowselect->align(FL_ALIGN_LEFT);

	G_rowselect->value(0);

	G_rowselect->selection_color(FL_YELLOW);

	G_rowselect->callback(RowSelect_CB);

	G_rowselect->tooltip("Click to toggle row vs. row/col selection");

	// Selection sum display

	win.end();

	win.begin();

	G_sum = new Fl_Output(140,G_table->y()+G_table->h()+10,160,25,"Selection Sum:");

	G_sum->value("(nothing selected)");

	G_sum->color(48);

	G_sum->tooltip("This field shows the sum of the selected cells in the table");

    win.end();

    win.resizable(G_table);

    win.show(); 

    return Fl::run();

}

//

// End of "$Id: table-with-keynav.cxx 9848 2013-03-25 23:20:29Z greg.ercolano $".

//