MacArthur, Ian (SELEX GALILEO, UK) wrote: > >> It's a question to behave consistently if we scale/zooned the widgets >> size/position we should as well do the same with it's font size. > > Why? > The behaviour you describe is consistent, and is pretty much what every > toolkit does. Indeed, I can't, off-hand, think of any that scale label > font sizes as their containing widgets change size, though I guess a few > do allow that as a (non-default) optional behaviour? > > > The setting of font sizes is predominantly an accessibility issue, not a > simple cosmetic one, so changing the selected font size is seldom a wise > choice. > I know some users who will rant and roar if your change their font > settings in any way (particularly folk using screen readers, or with > poor eyesight, for example.) > > <note> > That said, the default font settings in fltk are too small on some > modern high-DPI displays, so some means of setting the default font > appropriately is probably useful. > > At present, in code where I care about the minimum font size, I attempt > to do this by trying to determine the display DPI at app start-up, then > I overwrite the global fontsize setting held in FL_NORMAL_SIZE (which > looks like a define, but is actually a global var originating in > Fl_Widget.cxx) > > E.g. > > /** Change Default font size for widgets */ > extern Fl_Fontsize FL_NORMAL_SIZE; > : > : > my_new_size = 14; > : > : > // find the display DPI... > my_new_size =<whatever...>; > : > : > FL_NORMAL_SIZE = my_new_size; > : > // now create my widgets... > : > > The default value for FL_NORMAL_SIZE is 14, but you can change it. > I always change it *before* creating any widgets though - I do not know > if changing it will dynamically scale the widget font sizes... > </note> > > However, making the font smaller (or bigger) because the button is > shrinking (growing) - that I am not convinced by at all. > > Or - am I not understanding what you are suggesting? > > > SELEX Galileo Ltd > Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 > 3EL > A company registered in England& Wales. Company no. 02426132 > ******************************************************************** > This email and any attachments are confidential to the intended > recipient and may also be privileged. If you are not the intended > recipient please delete it from your system and notify the sender. > You should not copy it or use it for any purpose nor disclose or > distribute its contents to any other person. > ******************************************************************** >
Probably you didn't understand what my concern and probably didn't you have tried what I proposed. Try this: Open test/input.cxx and add this line to it: window->resizable(window); window->show(argc,argv); ///// this is a new line to be added return Fl::run(); Compile and run it type something on all input fields, resize to full screen and after that resize it to 1/3 of the original one. After that try this one and to the same when running it, I mean type something on input fields and resize, and tell me if you can understand by : > >> It's a question to behave consistently if we scale/zooned the widgets >> size/position we should as well do the same with it's font size. > ------------------------- // // "$Id: input.cxx 6777 2009-04-23 15:32:19Z matt $" // // Input field test program for the Fast Light Tool Kit (FLTK). // // Copyright 1998-2009 by Bill Spitzak and others. // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Library General Public // License as published by the Free Software Foundation; either // version 2 of the License, or (at your option) any later version. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Library General Public License for more details. // // You should have received a copy of the GNU Library General Public // License along with this library; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 // USA. // // Please report all bugs and problems on the following page: // // http://www.fltk.org/str.php // #include <stdio.h> #include <FL/Fl.H> #include <FL/Fl_Double_Window.H> #include <FL/Fl_Input.H> #include <FL/Fl_Float_Input.H> #include <FL/Fl_Int_Input.H> #include <FL/Fl_Secret_Input.H> #include <FL/Fl_Multiline_Input.H> #include <FL/Fl_Button.H> #include <FL/Fl_Toggle_Button.H> #include <FL/Fl_Color_Chooser.H> #include <vector> void cb(Fl_Widget *ob) { printf("Callback for %s '%s'\n",ob->label(),((Fl_Input*)ob)->value()); } int when = 0; int intial_height = 0; Fl_Fontsize initial_font_size = 14; Fl_Input *input[5]; void toggle_cb(Fl_Widget *o, long v) { if (((Fl_Toggle_Button*)o)->value()) when |= v; else when &= ~v; for (int i=0; i<5; i++) input[i]->when(when); } void test(Fl_Input *i) { if (i->changed()) { i->clear_changed(); printf("%s '%s'\n",i->label(),i->value()); char utf8buf[10]; int last = fl_utf8encode(i->index(i->position()), utf8buf); utf8buf[last] = 0; printf("Symbol at cursor position: %s\n", utf8buf); } } void button_cb(Fl_Widget *,void *) { for (int i=0; i<5; i++) test(input[i]); } void color_cb(Fl_Widget* button, void* v) { Fl_Color c; switch ((long)v) { case 0: c = FL_BACKGROUND2_COLOR; break; case 1: c = FL_SELECTION_COLOR; break; default: c = FL_FOREGROUND_COLOR; break; } uchar r,g,b; Fl::get_color(c, r,g,b); if (fl_color_chooser(0,r,g,b)) { Fl::set_color(c,r,g,b); Fl::redraw(); button->labelcolor(fl_contrast(FL_BLACK,c)); button->redraw(); } } class Resizable_Window : public Fl_Double_Window { public: Resizable_Window(int X, int Y, int W, int H, const char *L = 0):Fl_Double_Window(X, Y, W, H, L) {}; Resizable_Window(int W, int H, const char *L = 0):Fl_Double_Window(W, H, L) {}; public: void resize(int x, int y, int w, int h); }; void Resizable_Window::resize(int x, int y, int w, int h) { float hratio = h / (float)(intial_height); // root height //float wratio = w / (float)tmp.w; for(unsigned i=0; i < 5; i++) { input[i]->labelsize( initial_font_size * hratio); input[i]->textsize( initial_font_size * hratio); } Fl_Double_Window::resize(x,y,w,h); } int main(int argc, char **argv) { // the following two lines set the correct color scheme, so that // calling fl_contrast below will return good results Fl::args(argc, argv); Fl::get_system_colors(); intial_height = 400; Resizable_Window *window = new Resizable_Window(400,intial_height); int y = 10; input[0] = new Fl_Input(70,y,300,30,"Normal:"); y += 35; input[0]->tooltip("Normal input field"); // input[0]->cursor_color(FL_SELECTION_COLOR); // input[0]->maximum_size(20); // input[0]->static_value("this is a testgarbage"); input[1] = new Fl_Float_Input(70,y,300,30,"Float:"); y += 35; input[1]->tooltip("Input field for floating-point number (F1)"); input[1]->shortcut(FL_F+1); input[2] = new Fl_Int_Input(70,y,300,30,"Int:"); y += 35; input[2]->tooltip("Input field for integer number (F2)"); input[2]->shortcut(FL_F+2); input[3] = new Fl_Secret_Input(70,y,300,30,"&Secret:"); y += 35; input[3]->tooltip("Input field for password (Alt-S)"); input[4] = new Fl_Multiline_Input(70,y,300,100,"&Multiline:"); y += 105; input[4]->tooltip("Input field for short text with newlines (Alt-M)"); input[4]->wrap(1); for (int i = 0; i < 4; i++) { input[i]->when(0); input[i]->callback(cb); } int y1 = y; Fl_Button *b; b = new Fl_Toggle_Button(10,y,200,25,"FL_WHEN_CHANGED"); b->callback(toggle_cb, FL_WHEN_CHANGED); y += 25; b->tooltip("Do callback each time the text changes"); b = new Fl_Toggle_Button(10,y,200,25,"FL_WHEN_RELEASE"); b->callback(toggle_cb, FL_WHEN_RELEASE); y += 25; b->tooltip("Do callback when widget loses focus"); b = new Fl_Toggle_Button(10,y,200,25,"FL_WHEN_ENTER_KEY"); b->callback(toggle_cb, FL_WHEN_ENTER_KEY); y += 25; b->tooltip("Do callback when user hits Enter key"); b = new Fl_Toggle_Button(10,y,200,25,"FL_WHEN_NOT_CHANGED"); b->callback(toggle_cb, FL_WHEN_NOT_CHANGED); y += 25; b->tooltip("Do callback even if the text is not changed"); y += 5; b = new Fl_Button(10,y,200,25,"&print changed()"); b->callback(button_cb); b->tooltip("Print widgets that have changed() flag set"); b = new Fl_Button(220,y1,100,25,"color"); y1 += 25; b->color(input[0]->color()); b->callback(color_cb, (void*)0); b->tooltip("Color behind the text"); b = new Fl_Button(220,y1,100,25,"selection_color"); y1 += 25; b->color(input[0]->selection_color()); b->callback(color_cb, (void*)1); b->labelcolor(fl_contrast(FL_BLACK,b->color())); b->tooltip("Color behind selected text"); b = new Fl_Button(220,y1,100,25,"textcolor"); y1 += 25; b->color(input[0]->textcolor()); b->callback(color_cb, (void*)2); b->labelcolor(fl_contrast(FL_BLACK,b->color())); b->tooltip("Color of the text"); window->end(); window->resizable(window); window->show(argc,argv); return Fl::run(); } // // End of "$Id: input.cxx 6777 2009-04-23 15:32:19Z matt $". // _______________________________________________ fltk-dev mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk-dev
