/* * events.c * * Copyright 2015 Edward V. Emelianov * * This program 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; either version 2 of the License, or * (at your option) any later version. * * This program 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 this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301, USA. */ #include #include "events.h" #include "imageview.h" /** * manage pressed keys & menu items */ static void processKeybrd(unsigned char key, int mod, _U_ int x, _U_ int y){ windowData *win = getWin(); if(!win) return; DBG("key=%d (%c), mod=%d", key, key, mod); if(mod == GLUT_ACTIVE_CTRL){ // 'a' == 1, 'b' == 2... key += 'a'-1; DBG("CTRL+%c", key); switch(key){ case 'r': // roll colorfun win->winevt |= WINEVT_ROLLCOLORFUN; break; case 's': // save image win->winevt |= WINEVT_SAVEIMAGE; break; case 'q': // exit case 17: win->killthread = 1; break; } }else if(mod == GLUT_ACTIVE_ALT){ ; // ALT }else switch(key){ case '0': // return zoom to 1 & image to 0 win->zoom = 1; win->x = 0; win->y = 0; break; case 27: // esc - kill win->killthread = 1; break; case 'c': // capture in pause mode DBG("winevt = %d", win->winevt); if(win->winevt & WINEVT_PAUSE) win->winevt |= WINEVT_GETIMAGE; break; case 'l': // flip left-right win->flip ^= WIN_FLIP_LR; break; case 'p': // pause capturing win->winevt ^= WINEVT_PAUSE; break; case 'u': // flip up-down win->flip ^= WIN_FLIP_UD; break; case 'Z': // zoom+ win->zoom *= 1.1f; calc_win_props(NULL, NULL); break; case 'z': // zoom- win->zoom /= 1.1f; calc_win_props(NULL, NULL); break; } } /* * Process keyboard */ void keyPressed(unsigned char key, int x, int y){ int mod = glutGetModifiers(); //mod: GLUT_ACTIVE_SHIFT, GLUT_ACTIVE_CTRL, GLUT_ACTIVE_ALT; result is their sum DBG("Key pressed. mod=%d, keycode=%d (%c), point=(%d,%d)\n", mod, key, key, x,y); processKeybrd(key, mod, x, y); } /* void keySpPressed(_U_ int key, _U_ int x, _U_ int y){ // int mod = glutGetModifiers(); DBG("Sp. key pressed. mod=%d, keycode=%d, point=(%d,%d)\n", glutGetModifiers(), key, x,y); }*/ static int oldx, oldy; // coordinates when mouse was pressed static int movingwin = 0; // ==1 when user moves image by middle button void mousePressed(int key, int state, int x, int y){ // key: GLUT_LEFT_BUTTON, GLUT_MIDDLE_BUTTON, GLUT_RIGHT_BUTTON // state: GLUT_UP, GLUT_DOWN int mod = glutGetModifiers(); windowData *win = getWin(); if(!win) return; if(state == GLUT_DOWN){ oldx = x; oldy = y; float X,Y, Zoom = win->zoom; conv_mouse_to_image_coords(x,y,&X,&Y,win); DBG("press in (%d, %d) == (%f, %f) on image; mod == %d", x,y,X,Y, mod); if(key == GLUT_LEFT_BUTTON){ DBG("win->x=%g, win->y=%g", win->x, win->y); win->x += Zoom * (win->w/2.f - (float)x); win->y -= Zoom * (win->h/2.f - (float)y); }else if(key == GLUT_MIDDLE_BUTTON) movingwin = 1; else if(key == 3){ // wheel UP if(mod == 0) win->y += 10.f*win->zoom; // nothing pressed - scroll up else if(mod == GLUT_ACTIVE_SHIFT) win->x -= 10.f*Zoom; // shift pressed - scroll left else if(mod == GLUT_ACTIVE_CTRL) win->zoom *= 1.1f; // ctrl+wheel up == zoom+ }else if(key == 4){ // wheel DOWN if(mod == 0) win->y -= 10.f*win->zoom; // nothing pressed - scroll down else if(mod == GLUT_ACTIVE_SHIFT) win->x += 10.f*Zoom; // shift pressed - scroll right else if(mod == GLUT_ACTIVE_CTRL) win->zoom /= 1.1f; // ctrl+wheel down == zoom- } calc_win_props(NULL, NULL); }else{ movingwin = 0; } } void mouseMove(int x, int y){ windowData *win = getWin(); if(!win) return; if(movingwin){ float X, Y, nx, ny, w2, h2; float a = win->Daspect; X = (x - oldx) * a; Y = (y - oldy) * a; nx = win->x + X; ny = win->y - Y; w2 = win->image->w / 2.f * win->zoom; h2 = win->image->h / 2.f * win->zoom; if(nx < w2 && nx > -w2) win->x = nx; if(ny < h2 && ny > -h2) win->y = ny; oldx = x; oldy = y; calc_win_props(NULL, NULL); } } void menuEvents(int opt){ DBG("opt: %d, key: %d (%c), mod: %d", opt, opt&0xff, opt&0xff, opt>>8); // just work as shortcut pressed processKeybrd((unsigned char)(opt&0xff), opt>>8, 0, 0); } // GLUT_ACTIVE_CTRL typedef struct{ char *name; // menu entry name int symbol; // shortcut symbol + rolled modifier } menuentry; #define CTRL_K(key) ((key-'a'+1) | (GLUT_ACTIVE_CTRL<<8)) #define SHIFT_K(key) (key | (GLUT_ACTIVE_SHIFT<<8)) #define ALT_K(key) (key | (GLUT_ACTIVE_ALT<<8)) static const menuentry entries[] = { {"Capture in pause mode (c)", 'c'}, {"Flip image LR (l)", 'l'}, {"Flip image UD (u)", 'u'}, {"Make a pause/continue (p)", 'p'}, {"Restore zoom (0)", '0'}, {"Roll colorfun (ctrl+r)", CTRL_K('r')}, {"Save image (ctrl+s)", CTRL_K('s')}, {"Close this window (ESC)", 27}, {"Quit (ctrl+q)", CTRL_K('q')}, {NULL, 0} }; #undef CTRL_K #undef SHIFT_K #undef ALT_K void createMenu(){ FNAME(); windowData *win = getWin(); if(!win) return; DBG("menu for win ID %d", win->ID); glutSetWindow(win->ID); if(win->menu) glutDestroyMenu(win->menu); win->menu = glutCreateMenu(menuEvents); const menuentry *ptr = entries; while(ptr->name){ glutAddMenuEntry(ptr->name, ptr->symbol); ++ptr; } DBG("created menu %d\n", win->menu); glutAttachMenu(GLUT_RIGHT_BUTTON); }