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grafX2/input.c

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/* Grafx2 - The Ultimate 256-color bitmap paint program
Copyright 2009 Franck Charlet
Copyright 2007 Adrien Destugues
Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
Grafx2 is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2
of the License.
Grafx2 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Grafx2; if not, see <http://www.gnu.org/licenses/>
*/
#include <SDL.h>
#include "global.h"
#include "keyboard.h"
#include "sdlscreen.h"
#include "windows.h"
#include "errors.h"
#include "misc.h"
#include "input.h"
#ifdef __VBCC__
#define __attribute__(x)
#endif
void Handle_window_resize(SDL_ResizeEvent event);
void Handle_window_exit(SDL_QuitEvent event);
// public Globals (available as extern)
int Input_sticky_control = 0;
int Snap_axis = 0;
int Snap_axis_origin_X;
int Snap_axis_origin_Y;
// --
byte Directional_up;
byte Directional_up_right;
byte Directional_right;
byte Directional_down_right;
byte Directional_down;
byte Directional_down_left;
byte Directional_left;
byte Directional_up_left;
byte Directional_click;
long Directional_delay;
long Directional_last_move;
long Directional_step;
int Mouse_moved; ///< Boolean, Set to true if any cursor movement occurs.
word Input_new_mouse_X;
word Input_new_mouse_Y;
byte Input_new_mouse_K;
byte Mouse_mode = 0; ///< Mouse mode = 0:normal, 1:emulated with custom sensitivity.
short Mouse_virtual_x_position;
short Mouse_virtual_y_position;
short Mouse_virtual_width;
short Mouse_virtual_height;
// TODO: move to config
#ifdef __GP2X__
short Joybutton_shift=GP2X_BUTTON_L; // Button number that serves as a "shift" modifier
short Joybutton_control=GP2X_BUTTON_R; // Button number that serves as a "ctrl" modifier
short Joybutton_alt=GP2X_BUTTON_CLICK; // Button number that serves as a "alt" modifier
short Joybutton_left_click=GP2X_BUTTON_B; // Button number that serves as left click
short Joybutton_right_click=GP2X_BUTTON_Y; // Button number that serves as right-click
#else
short Joybutton_shift=-1; // Button number that serves as a "shift" modifier
short Joybutton_control=-1; // Button number that serves as a "ctrl" modifier
short Joybutton_alt=-1; // Button number that serves as a "alt" modifier
short Joybutton_left_click=0; // Button number that serves as left click
short Joybutton_right_click=0; // Button number that serves as right-click
#endif
int Is_shortcut(word Key, word function)
{
if (Key == 0 || function == 0xFFFF)
return 0;
if (function & 0x100)
{
if (Buttons_Pool[function&0xFF].Left_shortcut[0]==Key)
return 1;
if (Buttons_Pool[function&0xFF].Left_shortcut[1]==Key)
return 1;
return 0;
}
if (function & 0x200)
{
if (Buttons_Pool[function&0xFF].Right_shortcut[0]==Key)
return 1;
if (Buttons_Pool[function&0xFF].Right_shortcut[1]==Key)
return 1;
return 0;
}
if(Key == Config_Key[function][0])
return 1;
if(Key == Config_Key[function][1])
return 1;
return 0;
}
// Called each time there is a cursor move, either triggered by mouse or keyboard shortcuts
int Move_cursor_with_constraints()
{
int feedback=0;
int mouse_blocked=0; ///< Boolean, Set to true if mouse movement was clipped.
// Clip mouse to the editing area. There can be a border when using big
// pixels, if the SDL screen dimensions are not factors of the pixel size.
if (Input_new_mouse_Y>=Screen_height)
{
Input_new_mouse_Y=Screen_height-1;
mouse_blocked=1;
}
if (Input_new_mouse_X>=Screen_width)
{
Input_new_mouse_X=Screen_width-1;
mouse_blocked=1;
}
//Gestion "avanc<6E>e" du curseur: interdire la descente du curseur dans le
//menu lorsqu'on est en train de travailler dans l'image
if (Operation_stack_size != 0)
{
//Si le curseur ne se trouve plus dans l'image
if(Menu_Y<=Input_new_mouse_Y)
{
//On bloque le curseur en fin d'image
mouse_blocked=1;
Input_new_mouse_Y=Menu_Y-1; //La ligne !!au-dessus!! du menu
}
if(Main_magnifier_mode)
{
if(Operation_in_magnifier==0)
{
if(Input_new_mouse_X>=Main_separator_position)
{
mouse_blocked=1;
Input_new_mouse_X=Main_separator_position-1;
}
}
else
{
if(Input_new_mouse_X<Main_X_zoom)
{
mouse_blocked=1;
Input_new_mouse_X=Main_X_zoom;
}
}
}
}
if ((Input_new_mouse_X != Mouse_X) ||
(Input_new_mouse_Y != Mouse_Y) ||
(Input_new_mouse_K != Mouse_K))
{
// On every change of mouse state
if ((Input_new_mouse_K != Mouse_K))
{
feedback=1;
if (Input_new_mouse_K == 0)
Input_sticky_control = 0;
}
// Hide cursor, because even just a click change needs it
if (!Mouse_moved)
{
Mouse_moved++;
// Hide cursor (erasing icon and brush on screen
// before changing the coordinates.
Hide_cursor();
}
if (Input_new_mouse_X != Mouse_X || Input_new_mouse_Y != Mouse_Y)
{
Mouse_X=Input_new_mouse_X;
Mouse_Y=Input_new_mouse_Y;
}
Mouse_K=Input_new_mouse_K;
if (Mouse_moved > Config.Mouse_merge_movement)
if (! Operation[Current_operation][Mouse_K_unique]
[Operation_stack_size].Fast_mouse)
feedback=1;
}
if (mouse_blocked)
Set_mouse_position();
return feedback;
}
// WM events management
void Handle_window_resize(SDL_ResizeEvent event)
{
Resize_width = event.w;
Resize_height = event.h;
}
void Handle_window_exit(__attribute__((unused)) SDL_QuitEvent event)
{
Quit_is_required = 1;
}
// Mouse events management
int Handle_mouse_move(SDL_MouseMotionEvent event)
{
if (Mouse_mode == 0)
{
Input_new_mouse_X = event.x/Pixel_width;
Input_new_mouse_Y = event.y/Pixel_height;
}
else
{
Mouse_virtual_x_position += event.xrel * 12 / Config.Mouse_sensitivity_index_x;
// Clip
if (Mouse_virtual_x_position > Mouse_virtual_width)
Mouse_virtual_x_position = Mouse_virtual_width;
else if (Mouse_virtual_x_position < 0)
Mouse_virtual_x_position = 0;
Mouse_virtual_y_position += event.yrel * 12 / Config.Mouse_sensitivity_index_y;
// Clip
if (Mouse_virtual_y_position > Mouse_virtual_height)
Mouse_virtual_y_position = Mouse_virtual_height;
else if (Mouse_virtual_y_position < 0)
Mouse_virtual_y_position = 0;
Input_new_mouse_X = Mouse_virtual_x_position / 12 / Pixel_width;
Input_new_mouse_Y = Mouse_virtual_y_position / 12 / Pixel_height;
}
return Move_cursor_with_constraints();
}
int Handle_mouse_click(SDL_MouseButtonEvent event)
{
switch(event.button)
{
case SDL_BUTTON_LEFT:
Input_new_mouse_K |= 1;
break;
case SDL_BUTTON_RIGHT:
Input_new_mouse_K |= 2;
break;
case SDL_BUTTON_MIDDLE:
Key = KEY_MOUSEMIDDLE|Key_modifiers(SDL_GetModState());
// TODO: repeat system maybe?
return 0;
case SDL_BUTTON_WHEELUP:
Key = KEY_MOUSEWHEELUP|Key_modifiers(SDL_GetModState());
return 0;
case SDL_BUTTON_WHEELDOWN:
Key = KEY_MOUSEWHEELDOWN|Key_modifiers(SDL_GetModState());
return 0;
default:
return 0;
}
return Move_cursor_with_constraints();
}
int Handle_mouse_release(SDL_MouseButtonEvent event)
{
switch(event.button)
{
case SDL_BUTTON_LEFT:
Input_new_mouse_K &= ~1;
break;
case SDL_BUTTON_RIGHT:
Input_new_mouse_K &= ~2;
break;
}
return Move_cursor_with_constraints();
}
// Keyboard management
int Handle_key_press(SDL_KeyboardEvent event)
{
//Appui sur une touche du clavier
Key = Keysym_to_keycode(event.keysym);
Key_ANSI = Keysym_to_ANSI(event.keysym);
if(Is_shortcut(Key,SPECIAL_MOUSE_UP))
{
Directional_up=1;
return 0;
}
else if(Is_shortcut(Key,SPECIAL_MOUSE_DOWN))
{
Directional_down=1;
return 0;
}
else if(Is_shortcut(Key,SPECIAL_MOUSE_LEFT))
{
Directional_left=1;
return 0;
}
else if(Is_shortcut(Key,SPECIAL_MOUSE_RIGHT))
{
Directional_right=1;
return 0;
}
else if(Is_shortcut(Key,SPECIAL_CLICK_LEFT) && Keyboard_click_allowed > 0)
{
Input_new_mouse_K=1;
Directional_click=1;
return Move_cursor_with_constraints();
}
else if(Is_shortcut(Key,SPECIAL_CLICK_RIGHT) && Keyboard_click_allowed > 0)
{
Input_new_mouse_K=2;
Directional_click=2;
return Move_cursor_with_constraints();
}
return 0;
}
int Release_control(int key_code, int modifier)
{
int need_feedback = 0;
if (modifier == MOD_SHIFT)
{
// Disable "snap axis" mode
Snap_axis = 0;
need_feedback = 1;
}
if((key_code && key_code == (Config_Key[SPECIAL_MOUSE_UP][0]&0x0FFF)) || (Config_Key[SPECIAL_MOUSE_UP][0]&modifier) ||
(key_code && key_code == (Config_Key[SPECIAL_MOUSE_UP][1]&0x0FFF)) || (Config_Key[SPECIAL_MOUSE_UP][1]&modifier))
{
Directional_up=0;
}
if((key_code && key_code == (Config_Key[SPECIAL_MOUSE_DOWN][0]&0x0FFF)) || (Config_Key[SPECIAL_MOUSE_DOWN][0]&modifier) ||
(key_code && key_code == (Config_Key[SPECIAL_MOUSE_DOWN][1]&0x0FFF)) || (Config_Key[SPECIAL_MOUSE_DOWN][1]&modifier))
{
Directional_down=0;
}
if((key_code && key_code == (Config_Key[SPECIAL_MOUSE_LEFT][0]&0x0FFF)) || (Config_Key[SPECIAL_MOUSE_LEFT][0]&modifier) ||
(key_code && key_code == (Config_Key[SPECIAL_MOUSE_LEFT][1]&0x0FFF)) || (Config_Key[SPECIAL_MOUSE_LEFT][1]&modifier))
{
Directional_left=0;
}
if((key_code && key_code == (Config_Key[SPECIAL_MOUSE_RIGHT][0]&0x0FFF)) || (Config_Key[SPECIAL_MOUSE_RIGHT][0]&modifier) ||
(key_code && key_code == (Config_Key[SPECIAL_MOUSE_RIGHT][1]&0x0FFF)) || (Config_Key[SPECIAL_MOUSE_RIGHT][1]&modifier))
{
Directional_right=0;
}
if((key_code && key_code == (Config_Key[SPECIAL_CLICK_LEFT][0]&0x0FFF)) || (Config_Key[SPECIAL_CLICK_LEFT][0]&modifier) ||
(key_code && key_code == (Config_Key[SPECIAL_CLICK_LEFT][1]&0x0FFF)) || (Config_Key[SPECIAL_CLICK_LEFT][1]&modifier))
{
if (Directional_click & 1)
{
Directional_click &= ~1;
Input_new_mouse_K &= ~1;
return Move_cursor_with_constraints() || need_feedback;
}
}
if((key_code && key_code == (Config_Key[SPECIAL_CLICK_RIGHT][0]&0x0FFF)) || (Config_Key[SPECIAL_CLICK_RIGHT][0]&modifier) ||
(key_code && key_code == (Config_Key[SPECIAL_CLICK_RIGHT][1]&0x0FFF)) || (Config_Key[SPECIAL_CLICK_RIGHT][1]&modifier))
{
if (Directional_click & 2)
{
Directional_click &= ~2;
Input_new_mouse_K &= ~2;
return Move_cursor_with_constraints() || need_feedback;
}
}
// Other keys don't need to be released : they are handled as "events" and procesed only once.
// These clicks are apart because they need to be continuous (ie move while key pressed)
// We are relying on "hardware" keyrepeat to achieve that.
return need_feedback;
}
int Handle_key_release(SDL_KeyboardEvent event)
{
int modifier;
int released_key = Keysym_to_keycode(event.keysym) & 0x0FFF;
switch(event.keysym.sym)
{
case SDLK_RSHIFT:
case SDLK_LSHIFT:
modifier=MOD_SHIFT;
break;
case SDLK_RCTRL:
case SDLK_LCTRL:
modifier=MOD_CTRL;
break;
case SDLK_RALT:
case SDLK_LALT:
case SDLK_MODE:
modifier=MOD_ALT;
break;
case SDLK_RMETA:
case SDLK_LMETA:
modifier=MOD_META;
break;
default:
modifier=0;
}
return Release_control(released_key, modifier);
}
// Joystick management
int Handle_joystick_press(SDL_JoyButtonEvent event)
{
if (event.button == Joybutton_shift)
{
SDL_SetModState(SDL_GetModState() | KMOD_SHIFT);
return 0;
}
if (event.button == Joybutton_control)
{
SDL_SetModState(SDL_GetModState() | KMOD_CTRL);
return 0;
}
if (event.button == Joybutton_alt)
{
SDL_SetModState(SDL_GetModState() | (KMOD_ALT|KMOD_META));
return 0;
}
if (event.button == Joybutton_left_click)
{
Input_new_mouse_K=1;
return Move_cursor_with_constraints();
}
if (event.button == Joybutton_right_click)
{
Input_new_mouse_K=2;
return Move_cursor_with_constraints();
}
#ifdef __GP2X__
switch(event.button)
{
#ifndef NO_JOYCURSOR
case GP2X_BUTTON_UP:
Directional_up=1;
break;
case GP2X_BUTTON_UPRIGHT:
Directional_up_right=1;
break;
case GP2X_BUTTON_RIGHT:
Directional_right=1;
break;
case GP2X_BUTTON_DOWNRIGHT:
Directional_down_right=1;
break;
case GP2X_BUTTON_DOWN:
Directional_down=1;
break;
case GP2X_BUTTON_DOWNLEFT:
Directional_down_left=1;
break;
case GP2X_BUTTON_LEFT:
Directional_left=1;
break;
case GP2X_BUTTON_UPLEFT:
Directional_up_left=1;
break;
#endif
default:
break;
}
#endif
Key = (KEY_JOYBUTTON+event.button)|Key_modifiers(SDL_GetModState());
// TODO: systeme de r<>p<EFBFBD>tition
return Move_cursor_with_constraints();
}
int Handle_joystick_release(SDL_JoyButtonEvent event)
{
if (event.button == Joybutton_shift)
{
SDL_SetModState(SDL_GetModState() & ~KMOD_SHIFT);
return Release_control(0,MOD_SHIFT);
}
if (event.button == Joybutton_control)
{
SDL_SetModState(SDL_GetModState() & ~KMOD_CTRL);
return Release_control(0,MOD_CTRL);
}
if (event.button == Joybutton_alt)
{
SDL_SetModState(SDL_GetModState() & ~(KMOD_ALT|KMOD_META));
return Release_control(0,MOD_ALT);
}
if (event.button == Joybutton_left_click)
{
Input_new_mouse_K &= ~1;
return Move_cursor_with_constraints();
}
if (event.button == Joybutton_right_click)
{
Input_new_mouse_K &= ~2;
return Move_cursor_with_constraints();
}
#ifdef __GP2X__
switch(event.button)
{
case GP2X_BUTTON_UP:
Directional_up=0;
break;
case GP2X_BUTTON_UPRIGHT:
Directional_up_right=0;
break;
case GP2X_BUTTON_RIGHT:
Directional_right=0;
break;
case GP2X_BUTTON_DOWNRIGHT:
Directional_down_right=0;
break;
case GP2X_BUTTON_DOWN:
Directional_down=0;
break;
case GP2X_BUTTON_DOWNLEFT:
Directional_down_left=0;
break;
case GP2X_BUTTON_LEFT:
Directional_left=0;
break;
case GP2X_BUTTON_UPLEFT:
Directional_up_left=0;
break;
}
#endif
return Move_cursor_with_constraints();
}
void Handle_joystick_movement(SDL_JoyAxisEvent event)
{
#ifndef NO_JOYCURSOR
if (event.axis==0) // X
{
Directional_right=Directional_left=0;
if (event.value<-1000)
{
Directional_left=1;
}
else if (event.value>1000)
Directional_right=1;
}
else if (event.axis==1) // Y
{
Directional_up=Directional_down=0;
if (event.value<-1000)
{
Directional_up=1;
}
else if (event.value>1000)
Directional_down=1;
}
#endif
}
// Attempts to move the mouse cursor by the given deltas (may be more than 1 pixel at a time)
int Cursor_displace(short delta_x, short delta_y)
{
short x=Input_new_mouse_X;
short y=Input_new_mouse_Y;
if(Main_magnifier_mode && Input_new_mouse_Y < Menu_Y && Input_new_mouse_X > Main_separator_position)
{
// Cursor in zoomed area
if (delta_x<0)
Input_new_mouse_X = Max(Main_separator_position, x-Main_magnifier_factor);
else if (delta_x>0)
Input_new_mouse_X = Min(Screen_width-1, x+Main_magnifier_factor);
if (delta_y<0)
Input_new_mouse_Y = Max(0, y-Main_magnifier_factor);
else if (delta_y>0)
Input_new_mouse_Y = Min(Screen_height-1, y+Main_magnifier_factor);
}
else
{
if (delta_x<0)
Input_new_mouse_X = Max(0, x+delta_x);
else if (delta_x>0)
Input_new_mouse_X = Min(Screen_width-1, x+delta_x);
if (delta_y<0)
Input_new_mouse_Y = Max(0, y+delta_y);
else if (delta_y>0)
Input_new_mouse_Y = Min(Screen_height-1, y+delta_y);
}
return Move_cursor_with_constraints();
}
// Main input handling function
int Get_input(void)
{
SDL_Event event;
int user_feedback_required = 0; // Flag qui indique si on doit arr<72>ter de traiter les <20>v<EFBFBD>nements ou si on peut enchainer
Key_ANSI = 0;
Key = 0;
Mouse_moved=0;
Input_new_mouse_X = Mouse_X;
Input_new_mouse_Y = Mouse_Y;
// Process as much events as possible without redrawing the screen.
// This mostly allows us to merge mouse events for people with an high
// resolution mouse
while( (!user_feedback_required) && SDL_PollEvent(&event)) // Try to cumulate for a full VBL except if there is a required feedback
{
switch(event.type)
{
case SDL_VIDEORESIZE:
Handle_window_resize(event.resize);
user_feedback_required = 1;
break;
case SDL_QUIT:
Handle_window_exit(event.quit);
user_feedback_required = 1;
break;
case SDL_MOUSEMOTION:
user_feedback_required = Handle_mouse_move(event.motion);
break;
case SDL_MOUSEBUTTONDOWN:
Handle_mouse_click(event.button);
user_feedback_required = 1;
break;
case SDL_MOUSEBUTTONUP:
Handle_mouse_release(event.button);
user_feedback_required = 1;
break;
case SDL_KEYDOWN:
Handle_key_press(event.key);
user_feedback_required = 1;
break;
case SDL_KEYUP:
Handle_key_release(event.key);
break;
case SDL_JOYBUTTONUP:
Handle_joystick_release(event.jbutton);
user_feedback_required = 1;
break;
case SDL_JOYBUTTONDOWN:
Handle_joystick_press(event.jbutton);
user_feedback_required = 1;
break;
case SDL_JOYAXISMOTION:
Handle_joystick_movement(event.jaxis);
break;
default:
// DEBUG("Unhandled SDL event number : ",event.type);
break;
}
}
// Directional controller
if (!(Directional_up||Directional_up_right||Directional_right||
Directional_down_right||Directional_down||Directional_down_left||
Directional_left||Directional_up_left))
{
Directional_delay=-1;
Directional_last_move=SDL_GetTicks();
}
else
{
long time_now;
time_now=SDL_GetTicks();
if (time_now>Directional_last_move+Directional_delay)
{
// Speed parameters, acceleration etc. are here
if (Directional_delay==-1)
{
Directional_delay=150;
Directional_step=16;
}
else if (Directional_delay==150)
Directional_delay=40;
else if (Directional_delay!=0)
Directional_delay=Directional_delay*8/10;
else if (Directional_step<16*4)
Directional_step++;
Directional_last_move = time_now;
// Directional controller UP
if ((Directional_up||Directional_up_left||Directional_up_right) &&
!(Directional_down_right||Directional_down||Directional_down_left))
{
Cursor_displace(0, -Directional_step/16);
}
// Directional controller RIGHT
if ((Directional_up_right||Directional_right||Directional_down_right) &&
!(Directional_down_left||Directional_left||Directional_up_left))
{
Cursor_displace(Directional_step/16,0);
}
// Directional controller DOWN
if ((Directional_down_right||Directional_down||Directional_down_left) &&
!(Directional_up_left||Directional_up||Directional_up_right))
{
Cursor_displace(0, Directional_step/16);
}
// Directional controller LEFT
if ((Directional_down_left||Directional_left||Directional_up_left) &&
!(Directional_up_right||Directional_right||Directional_down_right))
{
Cursor_displace(-Directional_step/16,0);
}
}
}
// If the cursor was moved since last update,
// it was erased, so we need to redraw it (with the preview brush)
if (Mouse_moved)
{
Compute_paintbrush_coordinates();
Display_cursor();
}
// Commit any pending screen update.
// This is done in this function because it's called after reading
// some user input.
Flush_update();
return (Mouse_moved!=0) || user_feedback_required;
}
void Adjust_mouse_sensitivity(word fullscreen)
{
if (fullscreen == 0)
{
Mouse_mode = 0;
return;
}
Mouse_mode = 1;
Mouse_virtual_x_position = 12*Mouse_X*Pixel_width;
Mouse_virtual_y_position = 12*Mouse_Y*Pixel_height;
Mouse_virtual_width = 12*(Screen_width-1)*Pixel_width;
Mouse_virtual_height = 12*(Screen_height-1)*Pixel_height;
}
void Set_mouse_position(void)
{
if (Mouse_mode == 0)
{
SDL_WarpMouse(
Mouse_X*Pixel_width,
Mouse_Y*Pixel_height
);
}
else
{
Mouse_virtual_x_position = 12*Mouse_X*Pixel_width;
Mouse_virtual_y_position = 12*Mouse_Y*Pixel_height;
}
}
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