AGUI Help: Can't load font

AGUI Help: Can't load font

Restful Cargo

Member #16,106

October 2015

I am having trouble getting AGUI to work on a simple allegro menu example and was wondering if anyone could give me some advice (besides trying a different library). I am not sure if this is the correct forum to post this but if it isn't then have the mods delete the thread. Hopefully the author is still around?

The code sample at the end of this message compiles and links, but it explodes as soon as it calls function "agui::Font::load". I tried using different font files and copying it to different locations, but no success.

My code copies agui routines straight from the "agui_example.cpp" in the Agui-0.2.-1 distribution (which ironically works and loads the font just fine). Using Visual Studio 2013 with the pre-compiled allegro-msvc2013-x86-5.1.12 binaries.

Appreciate any help I could get. Thank you for your time.

#SelectExpand
   1#include <cstdio>
   2#include <string>
   3#include <allegro5/allegro.h>
   4#include <allegro5/allegro_native_dialog.h>
   5
   6
   7#include <Agui/Agui.hpp>
   8#include <Agui/Backends/Allegro5/Allegro5.hpp>
   9
  10#include <Agui/Widgets/Button/Button.hpp>
  11#include <Agui/Widgets/CheckBox/CheckBox.hpp>
  12#include <Agui/Widgets/DropDown/DropDown.hpp>
  13#include <Agui/Widgets/TextField/TextField.hpp>
  14#include <Agui/Widgets/Frame/Frame.hpp>
  15#include <Agui/Widgets/RadioButton/RadioButton.hpp>
  16#include <Agui/Widgets/RadioButton/RadioButtonGroup.hpp>
  17#include <Agui/Widgets/Slider/Slider.hpp>
  18#include <Agui/Widgets/TextBox/ExtendedTextBox.hpp>
  19#include <Agui/Widgets/Tab/TabbedPane.hpp>
  20#include <Agui/Widgets/ListBox/ListBox.hpp>
  21#include <Agui/Widgets/ScrollPane/ScrollPane.hpp>
  22#include <Agui/FlowLayout.hpp>
  23
  24
  25enum enum_menu{
  26  FILE_ID = 1,
  27  FILE_OPEN_ID,
  28  FILE_RESIZE_ID,
  29  FILE_FULLSCREEN_ID,
  30  FILE_CLOSE_ID,
  31  FILE_EXIT_ID,
  32  OPTIONS_ID,
  33  OPTIONS_INPUT_ID,
  34  HELP_ABOUT_ID
  35};
  36
  37ALLEGRO_MENU_INFO main_menu_info[] = {
  38  ALLEGRO_START_OF_MENU("&File", FILE_ID),
  39  { "&Open", FILE_OPEN_ID, 0, NULL },
  40  ALLEGRO_MENU_SEPARATOR,
  41  { "E&xit", FILE_EXIT_ID, 0, NULL },  
  42  ALLEGRO_END_OF_MENU,
  43  ALLEGRO_START_OF_MENU("&Options", OPTIONS_ID),
  44  { "&Input", OPTIONS_INPUT_ID, 0, NULL },
  45  ALLEGRO_END_OF_MENU
  46  
  47};
  48
  49ALLEGRO_DISPLAY *g_display = NULL;
  50ALLEGRO_MENU *g_menu;
  51ALLEGRO_EVENT_QUEUE *g_queue;
  52ALLEGRO_EVENT g_event;
  53bool bQuitFlag = false;
  54
  55agui::Gui *gui = NULL;
  56agui::Allegro5Input* inputHandler = NULL;
  57agui::Allegro5Graphics* graphicsHandler = NULL;
  58
  59agui::Font *defaultFont = NULL;
  60
  61
  62class SimpleActionListener : public agui::ActionListener
  63{
  64public:
  65  virtual void actionPerformed(const agui::ActionEvent &evt)
  66  {
  67    agui::Slider* slider = dynamic_cast<agui::Slider*>(evt.getSource());
  68    if (slider)
  69    {
  70      slider->setBackColor(agui::Color(slider->getValue(), slider->getValue(), slider->getValue()));
  71      return;
  72
  73    }
  74    al_show_native_message_box(al_get_current_display(),
  75      "Agui Action Listener",
  76      "",
  77      "An Action Event has occured!",
  78      NULL, NULL);
  79  }
  80};
  81
  82class WidgetCreator {
  83private:
  84  SimpleActionListener simpleAL;
  85  agui::FlowLayout flow;
  86  agui::Button button;
  87  agui::CheckBox checkBox;
  88  agui::DropDown dropDown;
  89  agui::TextField textField;
  90  agui::Frame frame;
  91  agui::Gui* mGui;
  92  agui::RadioButton rButton[3];
  93  agui::RadioButtonGroup rGroup;
  94  agui::Slider slider;
  95  agui::ExtendedTextBox exTextBox;
  96  agui::TabbedPane tabbedPane;
  97  agui::Tab tab[3];
  98  agui::ListBox listBox;
  99  agui::ScrollPane scrollPane;
 100  agui::Button scrollButtons[15];
 101
 102public:
 103  WidgetCreator(agui::Gui *guiInstance)
 104  {
 105    mGui = guiInstance;
 106    mGui->add(&flow);
 107    flow.add(&button);
 108    button.setSize(80, 40);
 109    button.setText("Push Me");
 110    button.addActionListener(&simpleAL);
 111
 112    
 113  }
 114};
 115
 116void initializeAgui()
 117{
 118
 119  //Set the image loader
 120  //agui::Image::setImageLoader(new agui::Allegro5ImageLoader);
 121
 122  //Set the font loader
 123  agui::Font::setFontLoader(new agui::Allegro5FontLoader);
 124
 125  //Instance the input handler
 126  inputHandler = new agui::Allegro5Input();
 127
 128  //Instance the graphics handler
 129  graphicsHandler = new agui::Allegro5Graphics();
 130
 131  //Allegro does not automatically premultiply alpha so let Agui do it
 132  agui::Color::setPremultiplyAlpha(true);
 133
 134  //Instance the gui
 135  gui = new agui::Gui();
 136
 137  //Set the input handler
 138  gui->setInput(inputHandler);
 139
 140  //Set the graphics handler
 141  gui->setGraphics(graphicsHandler);
 142
 143///////////////////////////////////////////////////////////////
 144
 145  defaultFont = agui::Font::load("DejaVuSans.ttf", 16);  // <--- CRASHES HERE
 146
 147///////////////////////////////////////////////////////////////
 148
 149  //Setting a global font is required and failure to do so will crash.
 150  agui::Widget::setGlobalFont(defaultFont);
 151
 152}
 153
 154WidgetCreator* creator;
 155
 156void do_menu()
 157{
 158  if (g_event.user.data2 == (intptr_t)g_display)
 159  {
 160    switch (g_event.user.data1)
 161    {
 162    case (HELP_ABOUT_ID) :
 163    {
 164      break;
 165    }
 166    case (FILE_OPEN_ID) :
 167    {
 168      
 169
 170      
 171      break;
 172    }
 173    case (FILE_EXIT_ID) :
 174    {
 175      bQuitFlag = true;
 176      break;
 177    }
 178    case OPTIONS_INPUT_ID:
 179    {
 180
 181      break;
 182    }
 183    } // end switch
 184
 185  }
 186
 187}
 188
 189int main(int argc, char *argv[])
 190{
 191
 192  al_init();
 193  al_install_keyboard();
 194
 195  g_display = al_create_display(320, 200);
 196  al_clear_to_color(al_map_rgb(0, 0, 0));
 197
 198  /* not checking init failures for simplicity */
 199
 200  if (al_init_native_dialog_addon())
 201  {
 202    g_menu = al_build_menu(main_menu_info);
 203    if (g_menu)
 204    {
 205      if (al_set_display_menu(g_display, g_menu))
 206      {
 207        initializeAgui();
 208        
 209        g_queue = al_create_event_queue();
 210        if (g_queue)
 211        {
 212          al_register_event_source(g_queue, al_get_display_event_source(g_display));
 213          al_register_event_source(g_queue, al_get_keyboard_event_source());
 214          al_register_event_source(g_queue, al_get_default_menu_event_source());
 215            
 216        }        
 217
 218      }
 219
 220    }
 221
 222  }
 223
 224  while (!bQuitFlag)
 225  {
 226    if (!al_is_event_queue_empty(g_queue))
 227    {
 228      al_get_next_event(g_queue, &g_event);
 229      {
 230        switch (g_event.type)
 231        {
 232        case ALLEGRO_EVENT_DISPLAY_CLOSE:
 233        {
 234          bQuitFlag = true;
 235          break;
 236        }
 237        case ALLEGRO_EVENT_MENU_CLICK:
 238        {
 239          do_menu();
 240          break;
 241        }
 242        case ALLEGRO_EVENT_KEY_DOWN:
 243        {
 244          if (g_event.keyboard.keycode == ALLEGRO_KEY_ESCAPE) 
 245            bQuitFlag = true;
 246          break;
 247        }
 248
 249        } // end switch
 250      } // end case
 251    } // end if
 252
 253    al_flip_display();
 254
 255  } // end while
 256
 257  return 0;
 258}

jmasterx

Member #11,410

October 2009

I see
al_init();
al_install_keyboard();

But I dont see you init the other addons... Look at all the addons the example inits: https://github.com/jmasterx/Agui/blob/master/example/agui_example_a5.cpp#L270

Agui GUI API -> https://github.com/jmasterx/Agui
Agui 0.2 Release Thread -> https://www.allegro.cc/forums/thread/612830

Restful Cargo

Member #16,106

October 2015

I see. I didn't initialize the necessary allegro routines. Thank you.