add resize examples as per STR3433

add example code for creating images for resize.dox
based on Article #415: How does resizing work?
https://www.fltk.org/articles.php?L415

see also https://www.fltk.org/str.php?L3433

1 files changed, 119 insertions, 0 deletions

diff --git a/test/resize-example3b.cxx b/test/resize-example3b.cxx
new file mode 100644
index 000000000..307122676
--- /dev/null
+++ b/test/resize-example3b.cxx
@@ -0,0 +1,119 @@
+//
+// Resize example for use in the Fast Light Tool Kit (FLTK) documentation.
+//
+//     See Article #415: How does resizing work?
+//     https://www.fltk.org/articles.php?L415
+//
+// Copyright 1998-2020 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:
+//
+//     https://www.fltk.org/COPYING.php
+//
+// Please see the following page on how to report bugs and issues:
+//
+//     https://www.fltk.org/bugs.php
+//
+
+#include "resize-arrows.h"
+#include <FL/Fl_Double_Window.H>
+#include <FL/Fl_Button.H>
+
+// resize dialog and arrow dimensions
+int TLx = 35, TRx = 270, TGx = 470, TLw = 200, TGw = 120, TAw = 35;
+int TLy = 35, BLy = 160, LGy = 250, TLh = 90, LGh = 90, LAh = 35;
+
+// window dimensions
+int Ww = 590, Wh = 340;
+
+Fl_Double_Window *window;
+
+class ResizeDialog : public Fl_Group {
+public:
+  ResizeDialog(int X, int Y, int W, int H, const char *T = 0);
+  Fl_Box *m_icon;
+  Fl_Box *m_message;
+  Fl_Button *m_button;
+};
+
+ResizeDialog::ResizeDialog(int X, int Y, int W, int H, const char *T)
+  : Fl_Group(X, Y, W, H, T) {
+  this->align(FL_ALIGN_TOP_LEFT);
+  this->box(FL_UP_BOX);
+
+  m_icon = new Fl_Box(X + 10, Y + 10, 30, 30, "!");
+  m_icon->box(FL_DOWN_BOX);
+  m_message = new Fl_Box(X + 50, Y + 10, 140, 30, "Out of Memory");
+  m_message->box(FL_DOWN_BOX);
+  m_message->color(FL_YELLOW);
+  m_button = new Fl_Button(X + 140, Y + 50, 50, 30, "Darn!");
+
+  this->end();
+  this->resizable(m_message);
+}
+
+class Resizables : public Fl_Group {
+public:
+  Resizables(int X, int Y, int W, int H, const char *T = 0);
+  ResizeDialog *TL, *TR, *BL, *BR; // topleft, topright, bottomleft, bottomright
+  Harrow *LA, *RA;                 // left arrow, right arrow
+  Varrow *TA, *BA;                 // top arrow, bottom arrow
+};
+
+Resizables::Resizables(int X, int Y, int W, int H, const char *T)
+  : Fl_Group(X, Y, W, H, T) {
+  this->box(FL_UP_BOX);
+  this->color(FL_WHITE);
+
+  TL = new ResizeDialog(X + TLx, Y + TLy, TLw, TLh, "Original Size");
+  TL->resizable(0);
+  TR = new ResizeDialog(X + TRx, Y + TLy, TLw, TLh, "Horizontally Resized");
+  BL = new ResizeDialog(X + TLx, Y + BLy, TLw, TLh, "Vertically Resized");
+  BR = new ResizeDialog(X + TRx, Y + BLy, TLw, TLh, "Horizontally and Vertically Resized");
+
+  Fl_Group *LG = new Fl_Group(X + TLx, Y + LGy, TLw, LGh);
+  LG->box(FL_NO_BOX);
+  LG->color(FL_WHITE);
+  LA = new Harrow(BL->m_message->x(), LG->y(), BL->m_message->w(), LAh, "Initial\nwidth");
+  LG->resizable(LA);
+  LG->end();
+
+  Fl_Group *RG = new Fl_Group(X + TRx, Y + LGy, TLw, LGh);
+  RG->box(FL_NO_BOX);
+  RG->color(FL_WHITE);
+  RA = new Harrow(BR->m_message->x(), LG->y(), BL->m_message->w(), LAh, "Resized\nwidth");
+  RG->resizable(RA);
+  RG->end();
+
+  Fl_Group *TG = new Fl_Group(X + TGx, Y + TLy, TGw, TLh);
+  TG->box(FL_NO_BOX);
+  TG->color(FL_WHITE);
+  TA = new Varrow(TG->x(), TR->m_message->y(), TAw, TR->m_message->h(), "Initial\nheight");
+  TG->resizable(TA);
+  TG->end();
+
+  Fl_Group *BG = new Fl_Group(X + TGx, Y + BLy, TGw, TLh);
+  BG->box(FL_NO_BOX);
+  BG->color(FL_WHITE);
+  BA = new Varrow(BG->x(), BR->m_message->y(), TAw, BR->m_message->h(), "Resized\nheight");
+  BG->resizable(BA);
+  BG->end();
+
+  this->resizable(BR);
+  this->end();
+}
+
+int main(int argc, char **argv) {
+  window = new Fl_Double_Window(Ww, Wh, "resize-example3b");
+  window->color(FL_WHITE);
+  Resizables *resizables = new Resizables(0, 0, Ww, Wh);
+  window->end();
+  window->resizable(resizables);
+  window->size_range(Ww, Wh);
+  window->show(argc, argv);
+  window->size(Ww + 50, Wh + 35);
+  Fl::visible_focus(0); // suppress focus box
+  return Fl::run();
+}