Added a new example to demonstrate complex widgets as children
of a tree with custom resizing behavior, selectable contents, etc. Also demonstrates the need for the new FL_TREE_ITEM_HEIGHT_FROM_WIDGET feature. git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@9405 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Greg Ercolano
parent
474feee1db
commit
16fb1bad6a
@ -23,6 +23,7 @@ ALL = howto-add_fd-and-popen$(EXEEXT) \
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texteditor-simple$(EXEEXT) \
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tree-simple$(EXEEXT) \
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tree-as-container$(EXEEXT) \
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tree-of-tables$(EXEEXT) \
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wizard-simple$(EXEEXT)
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# default target -- build everything
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155
examples/tree-of-tables.cxx
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155
examples/tree-of-tables.cxx
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@ -0,0 +1,155 @@
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//
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// "$Id$"
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//
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// Fl_Tree as a container of Fl_Table's. - erco 04/25/2012
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//
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// Demonstrates how one can make a tree where each item
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// contains a complex widget.
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//
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// Copyright 2010,2012 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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// http://www.fltk.org/COPYING.php
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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#include <stdio.h>
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#include <math.h> // powf()
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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_Tree.H>
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#include <FL/Fl_Table.H>
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#ifndef PI
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#define PI 3.14159
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#endif
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#if FLTK_ABI_VERSION >= 10302
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class MyTable : public Fl_Table {
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char *mode;
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public:
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MyTable(int X,int Y,int W,int H,char *mode) : Fl_Table(X,Y,W,H) {
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rows(11); row_height_all(20); row_header(1);
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cols(11); col_width_all(60); col_header(1);
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col_resize(1); // enable column resizing
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this->mode = mode;
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end();
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}
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void resize(int X,int Y,int W,int H) {
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if ( W > 718 ) W = 718; // don't exceed 700 in width
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Fl_Table::resize(X,Y,W,h()); // disallow changes in height
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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, int COL, int X, int Y, int W, int H) {
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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, 10); // set the font for our drawing operations
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return;
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case CONTEXT_COL_HEADER: // Drawing column/row headers
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case CONTEXT_ROW_HEADER: {
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int val = context==CONTEXT_COL_HEADER ? COL : ROW;
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int col = context==CONTEXT_COL_HEADER ? col_header_color() : row_header_color();
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fl_push_clip(X,Y,W,H);
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if ( strcmp(mode, "SinCos" ) == 0 ) { sprintf(s, "%.2f", ((val/10.0)*PI)); }
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else sprintf(s,"%d",val);
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fl_draw_box(FL_THIN_UP_BOX, X,Y,W,H, col);
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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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return;
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}
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case CONTEXT_CELL: { // Draw data in cells
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int col = is_selected(ROW,COL) ? FL_YELLOW : FL_WHITE;
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fl_push_clip(X,Y,W,H);
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if ( strcmp(mode, "Addition") == 0 ) { sprintf(s, "%d", ROW+COL); } else
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if ( strcmp(mode, "Subtract") == 0 ) { sprintf(s, "%d", ROW-COL); } else
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if ( strcmp(mode, "Multiply") == 0 ) { sprintf(s, "%d", ROW*COL); } else
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if ( strcmp(mode, "Divide" ) == 0 ) { if ( COL==0 ) sprintf(s, "N/A"); else sprintf(s, "%.2f", (float)ROW/(float)COL); } else
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if ( strcmp(mode, "Exponent") == 0 ) { sprintf(s, "%g", powf((float)ROW,(float)COL)); } else
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if ( strcmp(mode, "SinCos" ) == 0 ) { sprintf(s, "%.2f", sin((ROW/10.0)*PI) * cos((COL/10.0)*PI)); } else
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{ sprintf(s, "???"); }
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fl_color(col); fl_rectf(X,Y,W,H); // bg
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fl_color(FL_GRAY0); fl_draw(s, X,Y,W,H, FL_ALIGN_CENTER); // text
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fl_color(color()); fl_rect(X,Y,W,H); // box
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fl_pop_clip();
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return;
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}
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default:
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return;
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}
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}
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};
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int main(int argc, char *argv[]) {
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Fl_Double_Window *win = new Fl_Double_Window(700, 400, "Tree of tables");
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win->begin();
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{
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// Create tree
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Fl_Tree *tree = new Fl_Tree(10, 10, win->w()-20, win->h()-20);
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tree->root()->label("Math Tables");
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tree->item_labelfont(FL_COURIER); // font to use for items
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tree->linespacing(4); // extra space between items
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tree->item_draw_mode(tree->item_draw_mode() |
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FL_TREE_ITEM_DRAW_LABEL_AND_WIDGET | // draw item with widget() next to it
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FL_TREE_ITEM_HEIGHT_FROM_WIDGET); // make item height follow table's height
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tree->selectmode(FL_TREE_SELECT_NONE); // font to use for items
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tree->widgetmarginleft(12); // space between item and table
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tree->connectorstyle(FL_TREE_CONNECTOR_DOTTED);
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// Create tables, assign each a tree item
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tree->begin();
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{
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MyTable *table;
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Fl_Tree_Item *item;
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table = new MyTable(0,0,500,156,"Addition");
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item = tree->add("Arithmetic/Addition");
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item->widget(table);
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table = new MyTable(0,0,500,156,"Subtract");
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item = tree->add("Arithmetic/Subtract");
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item->widget(table);
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table = new MyTable(0,0,500,156,"Multiply");
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item = tree->add("Arithmetic/Multiply");
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item->widget(table);
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table = new MyTable(0,0,500,156,"Divide");
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item = tree->add("Arithmetic/Divide ");
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item->widget(table);
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table = new MyTable(0,0,500,156,"Exponent");
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item = tree->add("Misc/Exponent");
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item->widget(table);
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table = new MyTable(0,0,500,156,"SinCos");
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item = tree->add("Misc/Sin*Cos ");
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item->widget(table);
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}
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tree->end();
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}
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win->end();
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win->resizable(win);
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win->show(argc, argv);
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return(Fl::run());
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}
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#else /*FLTK_ABI_VERSION*/
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#include <FL/fl_ask.H>
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int main(int argc, char *argv[]) {
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fl_alert("This example must have FLTK_ABI_VERSION enabled to work properly.");
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return 1;
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}
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#endif
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//
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// End of "$Id$".
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//
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