132 lines
4.6 KiB
C++
132 lines
4.6 KiB
C++
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//
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// Simple example of using Fl_Table with popup menus - Greg Ercolano 12/16/2023
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// Ref: https://www.seriss.com/people/erco/fltk/#GLDynamicPopup
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//
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// Copyright 2023 Greg Ercolano.
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// Copyright 1998-2010 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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#include <FL/Fl.H>
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#include <FL/Fl_Double_Window.H>
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#include <FL/Fl_Table.H>
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#include <FL/fl_draw.H>
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#include <FL/Fl_Menu_Button.H>
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#define MAX_ROWS 30
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#define MAX_COLS 26 // A-Z
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// Derive a class from Fl_Table
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class MyTable : public Fl_Table {
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// Post context menu at current event x,y
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void PostContextMenu() {
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int context = callback_context();
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switch (context) {
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case CONTEXT_COL_HEADER:
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case CONTEXT_CELL: {
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char s[80];
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// Create context sensitive menu label
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if ( context == CONTEXT_CELL ) {
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sprintf(s, "Cell %c%d", 'A'+callback_col(), callback_row());
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} else {
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sprintf(s, "Column %c", 'A'+callback_col());
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}
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// Post dynamically created context menu, get user's choice
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Fl_Menu_Button menu(Fl::event_x(), Fl::event_y(), 80, 1);
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menu.add(s, 0, 0, 0, FL_MENU_DIVIDER|FL_MENU_INACTIVE);
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menu.add("Item 1");
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menu.add("Item 2");
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const Fl_Menu_Item *item = menu.popup();
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if ( item ) printf("You chose '%s'\n", item->label());
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break;
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}
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default: break;
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}
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}
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// MyTable callback
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static void my_callback(Fl_Widget*, void*data) {
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MyTable *o = (MyTable*)data;
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if ( Fl::event_button() == FL_RIGHT_MOUSE ) o->PostContextMenu();
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}
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// Draw the row/col headings
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// Make this a dark thin upbox with the text inside.
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//
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void DrawHeader(const char *s, int X, int Y, int W, int H) {
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fl_push_clip(X,Y,W,H);
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fl_draw_box(FL_THIN_UP_BOX, X,Y,W,H, row_header_color());
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fl_color(FL_BLACK);
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fl_draw(s, X,Y,W,H, FL_ALIGN_CENTER);
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fl_pop_clip();
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}
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// Draw the cells
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void DrawCell(const char *s, int X, int Y, int W, int H) {
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fl_push_clip(X,Y,W,H);
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fl_color(FL_WHITE); fl_rectf(X,Y,W,H); // Draw cell bg
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fl_color(FL_GRAY0); fl_draw(s, X,Y,W,H, FL_ALIGN_CENTER); // Draw cell text
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fl_color(color()); fl_rect(X,Y,W,H); // Draw box border
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fl_pop_clip();
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}
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// Handle drawing table's cells
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// Fl_Table calls this function to draw each visible cell in the table.
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// It's up to us to use FLTK's drawing functions to draw the cells the way we want.
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//
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void draw_cell(TableContext context, int ROW=0, int COL=0, int X=0, int Y=0, int W=0, int H=0) FL_OVERRIDE {
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static char s[40];
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switch ( context ) {
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case CONTEXT_STARTPAGE: // before page is drawn..
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fl_font(FL_HELVETICA, 16); // set the font for our drawing operations
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return;
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case CONTEXT_COL_HEADER: // Draw column headers
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sprintf(s,"%c",'A'+COL); // "A", "B", "C", etc.
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DrawHeader(s,X,Y,W,H);
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return;
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case CONTEXT_ROW_HEADER: // Draw row headers
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sprintf(s,"%03d:",ROW); // "001:", "002:", etc
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DrawHeader(s,X,Y,W,H);
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return;
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case CONTEXT_CELL: // Draw cells
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sprintf(s,"%c%d",'A'+COL,ROW);
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DrawCell(s,X,Y,W,H);
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return;
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default:
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return;
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}
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}
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public:
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// Constructor
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MyTable(int X, int Y, int W, int H, const char *L=0) : Fl_Table(X,Y,W,H,L) {
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// Rows
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rows(MAX_ROWS); // how many rows
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row_header(1); // enable row headers (along left)
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row_height_all(20); // default height of rows
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row_resize(0); // disable row resizing
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// Cols
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cols(MAX_COLS); // how many columns
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col_header(1); // enable column headers (along top)
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col_width_all(80); // default width of columns
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col_resize(1); // enable column resizing
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end(); // end the Fl_Table group
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callback(my_callback, (void*)this); // set a callback for the table
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}
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~MyTable() { }
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};
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int main(int argc, char **argv) {
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Fl_Double_Window win(900, 400, "Table Simple");
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MyTable table(10,10,880,380);
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win.end();
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win.resizable(table);
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win.show(argc,argv);
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return(Fl::run());
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}
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