101 lines
2.9 KiB
C++
101 lines
2.9 KiB
C++
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// fl_shortcut.C
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// Code to test and parse fltk shortcut numbers.
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// A shortcut is a keysym or'd with shift flags. In the simplest
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// sense a shortcut is matched if the shift state is exactly as
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// given and the key returning that keysym is pressed.
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// To make it easier to match some things it is more complex:
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// Only FL_META, FL_ALT, FL_SHIFT, and FL_CTRL must be "off". A
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// zero in the other shift flags indicates "dont care".
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// It also checks against the first character of Fl::event_text(),
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// and zero for FL_SHIFT means "don't care".
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// This allows punctuation shortcuts like "#" to work (rather than
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// calling it "shift+3")
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#include <FL/Fl.H>
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#include <FL/Fl_Widget.H>
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#include <ctype.h>
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#include <string.h>
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#ifndef WIN32
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#include <X11/Xlib.h>
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#endif
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int Fl::test_shortcut(int shortcut) {
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if (!shortcut) return 0;
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int shift = Fl::event_state();
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// see if any required shift flags are off:
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if ((shortcut&shift) != (shortcut&0x7fff0000)) return 0;
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// record shift flags that are wrong:
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int mismatch = (shortcut^shift)&0x7fff0000;
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// these three must always be correct:
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if (mismatch&(FL_META|FL_ALT|FL_CTRL)) return 0;
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int key = shortcut & 0xffff;
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// if shift is also correct, check for exactly equal keysyms:
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if (!(mismatch&(FL_SHIFT)) && key == Fl::event_key()) return 1;
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// try matching ascii, ignore shift:
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if (key == event_text()[0]) return 1;
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// kludge so that Ctrl+'_' works (as opposed to Ctrl+'^_'):
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if ((shift&FL_CTRL) && key >= 0x3f && key <= 0x5F
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&& event_text()[0]==(key^0x40)) return 1;
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return 0;
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}
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const char * fl_shortcut_label(int shortcut) {
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static char buf[20];
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char *p = buf;
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if (!shortcut) {*p = 0; return buf;}
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if (shortcut & FL_META) {strcpy(p,"Meta+"); p += 5;}
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if (shortcut & FL_ALT) {strcpy(p,"Alt+"); p += 4;}
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if (shortcut & FL_SHIFT) {strcpy(p,"Shift+"); p += 6;}
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if (shortcut & FL_CTRL) {strcpy(p,"Ctrl+"); p += 5;}
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int key = shortcut & 0xFFFF;
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#ifdef WIN32
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if (key >= FL_F && key <= FL_F_Last) {
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*p++ = 'F';
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if (key > FL_F+9) *p++ = (key-FL_F)/10+'0';
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*p++ = (key-FL_F)%10 + '0';
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} else {
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if (key == FL_Enter || key == '\r') {strcpy(p,"Enter"); return buf;}
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*p++ = uchar(key);
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}
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*p = 0;
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return buf;
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#else
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const char* q;
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if (key == FL_Enter || key == '\r') q="Enter"; // don't use Xlib's "Return"
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else if (key > 32 && key < 0x100) q = 0;
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else q = XKeysymToString(key);
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if (!q) {*p++ = uchar(key); *p = 0; return buf;}
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if (p > buf) {strcpy(p,q); return buf;} else return q;
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#endif
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}
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// Tests for &x shortcuts in button labels:
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int Fl_Widget::test_shortcut(const char *label) {
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char c = Fl::event_text()[0];
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if (!c || !label) return 0;
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for (;;) {
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if (!*label) return 0;
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if (*label++ == '&' && *label) {
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if (*label == '&') label++;
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else if (*label == c) return 1;
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else return 0;
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}
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}
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}
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int Fl_Widget::test_shortcut() {
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if (!(flags()&SHORTCUT_LABEL)) return 0;
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return test_shortcut(label());
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}
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