ref: ef4a4ef43b986cb5e4dd60ef753c79d7f79acb22
dir: /external/fltk/examples/table-with-keynav.cxx/
// // "$Id$" // // 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<rows(); R++ ) { for ( int C=0; C<cols(); 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 "$Id$". //