FLUID: Add Synchronized Resize. #1055

fluid/Fl_Window_Type.cxx

@@ -5,7 +5,7 @@
 // for interacting with the overlay, which allows the user to
 // select, move, and resize the children widgets.
 //
-// Copyright 1998-2023 by Bill Spitzak and others.
+// Copyright 1998-2024 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
@@ -408,7 +408,12 @@ Fl_Window_Type Fl_Window_type;
 
 // Resize from window manager...
 void Overlay_Window::resize(int X,int Y,int W,int H) {
-  Fl_Widget* t = resizable(); resizable(0);
+  undo_checkpoint_once(kUndoWindowResize);
+
+  Fl_Widget* t = resizable();
+  if (Fl_Type::allow_layout == 0) {
+    resizable(0);
+  }
 
   // do not set the mod flag if the window was not resized. In FLUID, all
   // windows are opened without a given x/y position, so modifying x/y

fluid/documentation/src/page_main_window.dox

@@ -346,6 +346,11 @@ the first selected widget.
 __Layout > Center in Group > ...__: Center all selected widgets relative to
 their parent widget
 
+__Layout > Synchronized Resize__: If unchecked, groups and windows can be
+resized without resizing their children. If set, the layout of the children
+is changed according to their `resize()` settings. Try __Live Resize__ to
+verify the effects before permanently modifying the layout.
+
 __Layout > Grid and Size Settings... (Ctrl+g)__: Display the grid settings
 panel. See \ref setting_layout .
 

fluid/fluid.cxx

@@ -1637,7 +1637,8 @@ static void menu_file_new_from_template_cb(Fl_Widget *, void *) { new_project_fr
 static void menu_file_open_cb(Fl_Widget *, void *) { open_project_file(""); }
 static void menu_file_insert_cb(Fl_Widget *, void *) { merge_project_file(""); }
 static void menu_file_open_history_cb(Fl_Widget *, void *v) { open_project_file(Fl_String((const char*)v)); }
-
+static void menu_layout_sync_resize_cb(Fl_Menu_ *m, void*) {
+  if (m->mvalue()->value()) Fl_Type::allow_layout = 1; else Fl_Type::allow_layout = 0; }
 /**
  This is the main Fluid menu.
 
@@ -1722,10 +1723,11 @@ Fl_Menu_Item Main_Menu[] = {
     {"&Height",0,(Fl_Callback *)align_widget_cb,(void*)31},
     {"&Both",0,(Fl_Callback *)align_widget_cb,(void*)32},
     {0},
-  {"&Center In Group",0,0,0,FL_SUBMENU|FL_MENU_DIVIDER},
+  {"&Center In Group",0,0,0,FL_SUBMENU},
     {"&Horizontal",0,(Fl_Callback *)align_widget_cb,(void*)40},
     {"&Vertical",0,(Fl_Callback *)align_widget_cb,(void*)41},
     {0},
+  {"Synchronized Resize", 0, (Fl_Callback*)menu_layout_sync_resize_cb, NULL, FL_MENU_TOGGLE|FL_MENU_DIVIDER },
   {"&Grid and Size Settings...",FL_COMMAND+'g',show_grid_cb, NULL, FL_MENU_DIVIDER},
   {"Presets", 0, layout_suite_marker, (void*)main_layout_submenu_, FL_SUBMENU_POINTER },
   {"Application", 0, select_layout_preset_cb, (void*)0, FL_MENU_RADIO|FL_MENU_VALUE },

fluid/undo.cxx

@@ -1,7 +1,7 @@
 //
 // FLUID undo support for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2021 by Bill Spitzak and others.
+// Copyright 1998-2024 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
@@ -53,6 +53,7 @@ int undo_last = 0;                      // Last undo level in buffer
 int undo_max = 0;                       // Maximum undo level used
 int undo_save = -1;                     // Last undo level that was saved
 static int undo_paused = 0;             // Undo checkpointing paused?
+int undo_once_type = 0;                 // Suspend further undos of the same type
 
 
 // Return the undo filename.
@@ -80,6 +81,7 @@ static char *undo_filename(int level) {
 void redo_cb(Fl_Widget *, void *) {
   // int undo_item = main_menubar->find_index(undo_cb);
   // int redo_item = main_menubar->find_index(redo_cb);
+  undo_once_type = 0;
 
   if (undo_current >= undo_last) {
     fl_beep();
@@ -120,6 +122,7 @@ void redo_cb(Fl_Widget *, void *) {
 void undo_cb(Fl_Widget *, void *) {
   // int undo_item = main_menubar->find_index(undo_cb);
   // int redo_item = main_menubar->find_index(redo_cb);
+  undo_once_type = 0;
 
   if (undo_current <= 0) {
     fl_beep();
@@ -165,6 +168,16 @@ void undo_cb(Fl_Widget *, void *) {
   undo_resume();
 }
 
+void undo_checkpoint_once(int type) {
+  if (undo_paused) return;
+  if (undo_once_type != type) {
+    undo_checkpoint();
+    undo_once_type = type;
+  } else {
+    // do not add more checkpoints for the same undo typw
+  }
+}
+
 // Save current file to undo buffer
 void undo_checkpoint() {
   //  printf("undo_checkpoint(): undo_current=%d, undo_paused=%d, modflag=%d\n",
@@ -175,6 +188,7 @@ void undo_checkpoint() {
 
   // int undo_item = main_menubar->find_index(undo_cb);
   // int redo_item = main_menubar->find_index(redo_cb);
+  undo_once_type = 0;
 
   // Save the current UI to a checkpoint file...
   const char *filename = undo_filename(undo_current);

fluid/undo.h

@@ -1,7 +1,7 @@
 //
 // FLUID undo definitions for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2010 by Bill Spitzak and others.
+// Copyright 1998-2024 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
@@ -19,13 +19,17 @@
 
 class Fl_Widget;
 
+#define kUndoWindowResize 1
+
 extern int undo_current;                // Current undo level in buffer
 extern int undo_last;                   // Last undo level in buffer
 extern int undo_save;                   // Last undo level that was saved
+extern int undo_once_type;              // Suspend further undos of the same type
 
 void redo_cb(Fl_Widget *, void *);      // Redo menu callback
 void undo_cb(Fl_Widget *, void *);      // Undo menu callback
 void undo_checkpoint();                 // Save current file to undo buffer
+void undo_checkpoint_once(int type);    // Save undo buffer once until a different checkpoint type is called
 void undo_clear();                      // Clear undo buffer
 void undo_resume();                     // Resume undo checkpoints
 void undo_suspend();                    // Suspend undo checkpoints