| 0,0 → 1,421 |
|---|
| /* PDCurses */ |
| |
| #include <curspriv.h> |
| |
| /*man-start************************************************************** |
| |
| mouse |
| ----- |
| |
| ### Synopsis |
| |
| int mouse_set(mmask_t mbe); |
| int mouse_on(mmask_t mbe); |
| int mouse_off(mmask_t mbe); |
| int request_mouse_pos(void); |
| void wmouse_position(WINDOW *win, int *y, int *x); |
| mmask_t getmouse(void); |
| |
| int mouseinterval(int wait); |
| bool wenclose(const WINDOW *win, int y, int x); |
| bool wmouse_trafo(const WINDOW *win, int *y, int *x, bool to_screen); |
| bool mouse_trafo(int *y, int *x, bool to_screen); |
| mmask_t mousemask(mmask_t mask, mmask_t *oldmask); |
| int nc_getmouse(MEVENT *event); |
| int ungetmouse(MEVENT *event); |
| bool has_mouse(void); |
| |
| ### Description |
| |
| As of PDCurses 3.0, there are two separate mouse interfaces: the |
| classic interface, which is based on the undocumented Sys V mouse |
| functions; and an ncurses-compatible interface. Both are active at |
| all times, and you can mix and match functions from each, though it's |
| not recommended. The ncurses interface is essentially an emulation |
| layer built on top of the classic interface; it's here to allow |
| easier porting of ncurses apps. |
| |
| The classic interface: mouse_set(), mouse_on(), mouse_off(), |
| request_mouse_pos(), wmouse_position(), and getmouse(). An |
| application using this interface would start by calling mouse_set() |
| or mouse_on() with a non-zero value, often ALL_MOUSE_EVENTS. Then it |
| would check for a KEY_MOUSE return from getch(). If found, it would |
| call request_mouse_pos() to get the current mouse status. |
| |
| mouse_set(), mouse_on() and mouse_off() are analagous to attrset(), |
| attron() and attroff(). These functions set the mouse button events |
| to trap. The button masks used in these functions are defined in |
| curses.h and can be or'ed together. They are the group of masks |
| starting with BUTTON1_RELEASED. |
| |
| request_mouse_pos() requests curses to fill in the Mouse_status |
| structure with the current state of the mouse. |
| |
| wmouse_position() determines if the current mouse position is within |
| the window passed as an argument. If the mouse is outside the current |
| window, -1 is returned in the y and x arguments; otherwise the y and |
| x coordinates of the mouse (relative to the top left corner of the |
| window) are returned in y and x. |
| |
| getmouse() returns the current status of the trapped mouse buttons as |
| set by mouse_set() or mouse_on(). |
| |
| The ncurses interface: mouseinterval(), wenclose(), wmouse_trafo(), |
| mouse_trafo(), mousemask(), nc_getmouse(), ungetmouse() and |
| has_mouse(). A typical application using this interface would start |
| by calling mousemask() with a non-zero value, often ALL_MOUSE_EVENTS. |
| Then it would check for a KEY_MOUSE return from getch(). If found, it |
| would call nc_getmouse() to get the current mouse status. |
| |
| mouseinterval() sets the timeout for a mouse click. On all current |
| platforms, PDCurses receives mouse button press and release events, |
| but must synthesize click events. It does this by checking whether a |
| release event is queued up after a press event. If it gets a press |
| event, and there are no more events waiting, it will wait for the |
| timeout interval, then check again for a release. A press followed by |
| a release is reported as BUTTON_CLICKED; otherwise it's passed |
| through as BUTTON_PRESSED. The default timeout is 150ms; valid values |
| are 0 (no clicks reported) through 1000ms. In x11, the timeout can |
| also be set via the clickPeriod resource. The return value from |
| mouseinterval() is the old timeout. To check the old value without |
| setting a new one, call it with a parameter of -1. Note that although |
| there's no classic equivalent for this function (apart from the |
| clickPeriod resource), the value set applies in both interfaces. |
| |
| wenclose() reports whether the given screen-relative y, x coordinates |
| fall within the given window. |
| |
| wmouse_trafo() converts between screen-relative and window-relative |
| coordinates. A to_screen parameter of TRUE means to convert from |
| window to screen; otherwise the reverse. The function returns FALSE |
| if the coordinates aren't within the window, or if any of the |
| parameters are NULL. The coordinates have been converted when the |
| function returns TRUE. |
| |
| mouse_trafo() is the stdscr version of wmouse_trafo(). |
| |
| mousemask() is nearly equivalent to mouse_set(), but instead of |
| OK/ERR, it returns the value of the mask after setting it. (This |
| isn't necessarily the same value passed in, since the mask could be |
| altered on some platforms.) And if the second parameter is a non-null |
| pointer, mousemask() stores the previous mask value there. Also, |
| since the ncurses interface doesn't work with PDCurses' BUTTON_MOVED |
| events, mousemask() filters them out. |
| |
| nc_getmouse() returns the current mouse status in an MEVENT struct. |
| This is equivalent to ncurses' getmouse(), renamed to avoid conflict |
| with PDCurses' getmouse(). But if you define PDC_NCMOUSE before |
| including curses.h, it defines getmouse() to nc_getmouse(), along |
| with a few other redefintions needed for compatibility with ncurses |
| code. nc_getmouse() calls request_mouse_pos(), which (not getmouse()) |
| is the classic equivalent. |
| |
| ungetmouse() is the mouse equivalent of ungetch(). However, PDCurses |
| doesn't maintain a queue of mouse events; only one can be pushed |
| back, and it can overwrite or be overwritten by real mouse events. |
| |
| has_mouse() reports whether the mouse is available at all on the |
| current platform. |
| |
| ### Portability |
| X/Open ncurses NetBSD |
| mouse_set - - - |
| mouse_on - - - |
| mouse_off - - - |
| request_mouse_pos - - - |
| wmouse_position - - - |
| getmouse - * - |
| mouseinterval - Y - |
| wenclose - Y - |
| wmouse_trafo - Y - |
| mouse_trafo - Y - |
| mousemask - Y - |
| nc_getmouse - * - |
| ungetmouse - Y - |
| has_mouse - Y - |
| |
| * See above, under Description |
| |
| **man-end****************************************************************/ |
| |
| #include <string.h> |
| |
| static bool ungot = FALSE; |
| |
| int mouse_set(mmask_t mbe) |
| { |
| PDC_LOG(("mouse_set() - called: event %x\n", mbe)); |
| |
| if (!SP) |
| return ERR; |
| |
| SP->_trap_mbe = mbe; |
| return PDC_mouse_set(); |
| } |
| |
| int mouse_on(mmask_t mbe) |
| { |
| PDC_LOG(("mouse_on() - called: event %x\n", mbe)); |
| |
| if (!SP) |
| return ERR; |
| |
| SP->_trap_mbe |= mbe; |
| return PDC_mouse_set(); |
| } |
| |
| int mouse_off(mmask_t mbe) |
| { |
| PDC_LOG(("mouse_off() - called: event %x\n", mbe)); |
| |
| if (!SP) |
| return ERR; |
| |
| SP->_trap_mbe &= ~mbe; |
| return PDC_mouse_set(); |
| } |
| |
| int request_mouse_pos(void) |
| { |
| PDC_LOG(("request_mouse_pos() - called\n")); |
| |
| Mouse_status = SP->mouse_status; |
| |
| return OK; |
| } |
| |
| void wmouse_position(WINDOW *win, int *y, int *x) |
| { |
| PDC_LOG(("wmouse_position() - called\n")); |
| |
| if (win && wenclose(win, MOUSE_Y_POS, MOUSE_X_POS)) |
| { |
| if (y) |
| *y = MOUSE_Y_POS - win->_begy; |
| if (x) |
| *x = MOUSE_X_POS - win->_begx; |
| } |
| else |
| { |
| if (y) |
| *y = -1; |
| if (x) |
| *x = -1; |
| } |
| } |
| |
| mmask_t getmouse(void) |
| { |
| PDC_LOG(("getmouse() - called\n")); |
| |
| return SP ? SP->_trap_mbe : (mmask_t)0; |
| } |
| |
| /* ncurses mouse interface */ |
| |
| int mouseinterval(int wait) |
| { |
| int old_wait; |
| |
| PDC_LOG(("mouseinterval() - called: %d\n", wait)); |
| |
| if (!SP) |
| return ERR; |
| |
| old_wait = SP->mouse_wait; |
| |
| if (wait >= 0 && wait <= 1000) |
| SP->mouse_wait = wait; |
| |
| return old_wait; |
| } |
| |
| bool wenclose(const WINDOW *win, int y, int x) |
| { |
| PDC_LOG(("wenclose() - called: %p %d %d\n", win, y, x)); |
| |
| return (win && y >= win->_begy && y < win->_begy + win->_maxy |
| && x >= win->_begx && x < win->_begx + win->_maxx); |
| } |
| |
| bool wmouse_trafo(const WINDOW *win, int *y, int *x, bool to_screen) |
| { |
| int newy, newx; |
| |
| PDC_LOG(("wmouse_trafo() - called\n")); |
| |
| if (!win || !y || !x) |
| return FALSE; |
| |
| newy = *y; |
| newx = *x; |
| |
| if (to_screen) |
| { |
| newy += win->_begy; |
| newx += win->_begx; |
| |
| if (!wenclose(win, newy, newx)) |
| return FALSE; |
| } |
| else |
| { |
| if (wenclose(win, newy, newx)) |
| { |
| newy -= win->_begy; |
| newx -= win->_begx; |
| } |
| else |
| return FALSE; |
| } |
| |
| *y = newy; |
| *x = newx; |
| |
| return TRUE; |
| } |
| |
| bool mouse_trafo(int *y, int *x, bool to_screen) |
| { |
| PDC_LOG(("mouse_trafo() - called\n")); |
| |
| return wmouse_trafo(stdscr, y, x, to_screen); |
| } |
| |
| mmask_t mousemask(mmask_t mask, mmask_t *oldmask) |
| { |
| PDC_LOG(("mousemask() - called\n")); |
| |
| if (!SP) |
| return (mmask_t)0; |
| |
| if (oldmask) |
| *oldmask = SP->_trap_mbe; |
| |
| /* The ncurses interface doesn't work with our move events, so |
| filter them here */ |
| |
| mask &= ~(BUTTON1_MOVED | BUTTON2_MOVED | BUTTON3_MOVED); |
| |
| mouse_set(mask); |
| |
| return SP->_trap_mbe; |
| } |
| |
| int nc_getmouse(MEVENT *event) |
| { |
| int i; |
| mmask_t bstate = 0; |
| |
| PDC_LOG(("nc_getmouse() - called\n")); |
| |
| if (!event || !SP) |
| return ERR; |
| |
| ungot = FALSE; |
| |
| request_mouse_pos(); |
| |
| event->id = 0; |
| |
| event->x = Mouse_status.x; |
| event->y = Mouse_status.y; |
| event->z = 0; |
| |
| for (i = 0; i < 3; i++) |
| { |
| if (Mouse_status.changes & (1 << i)) |
| { |
| int shf = i * 5; |
| short button = Mouse_status.button[i] & BUTTON_ACTION_MASK; |
| |
| if (button == BUTTON_RELEASED) |
| bstate |= (BUTTON1_RELEASED << shf); |
| else if (button == BUTTON_PRESSED) |
| bstate |= (BUTTON1_PRESSED << shf); |
| else if (button == BUTTON_CLICKED) |
| bstate |= (BUTTON1_CLICKED << shf); |
| else if (button == BUTTON_DOUBLE_CLICKED) |
| bstate |= (BUTTON1_DOUBLE_CLICKED << shf); |
| |
| button = Mouse_status.button[i] & BUTTON_MODIFIER_MASK; |
| |
| if (button & PDC_BUTTON_SHIFT) |
| bstate |= BUTTON_MODIFIER_SHIFT; |
| if (button & PDC_BUTTON_CONTROL) |
| bstate |= BUTTON_MODIFIER_CONTROL; |
| if (button & PDC_BUTTON_ALT) |
| bstate |= BUTTON_MODIFIER_ALT; |
| } |
| } |
| |
| if (MOUSE_WHEEL_UP) |
| bstate |= BUTTON4_PRESSED; |
| else if (MOUSE_WHEEL_DOWN) |
| bstate |= BUTTON5_PRESSED; |
| |
| /* extra filter pass -- mainly for button modifiers */ |
| |
| event->bstate = bstate & SP->_trap_mbe; |
| |
| return OK; |
| } |
| |
| int ungetmouse(MEVENT *event) |
| { |
| int i; |
| mmask_t bstate; |
| |
| PDC_LOG(("ungetmouse() - called\n")); |
| |
| if (!event || ungot) |
| return ERR; |
| |
| ungot = TRUE; |
| |
| SP->mouse_status.x = event->x; |
| SP->mouse_status.y = event->y; |
| |
| SP->mouse_status.changes = 0; |
| bstate = event->bstate; |
| |
| for (i = 0; i < 3; i++) |
| { |
| int shf = i * 5; |
| short button = 0; |
| |
| if (bstate & ((BUTTON1_RELEASED | BUTTON1_PRESSED | |
| BUTTON1_CLICKED | BUTTON1_DOUBLE_CLICKED) << shf)) |
| { |
| SP->mouse_status.changes |= 1 << i; |
| |
| if (bstate & (BUTTON1_PRESSED << shf)) |
| button = BUTTON_PRESSED; |
| if (bstate & (BUTTON1_CLICKED << shf)) |
| button = BUTTON_CLICKED; |
| if (bstate & (BUTTON1_DOUBLE_CLICKED << shf)) |
| button = BUTTON_DOUBLE_CLICKED; |
| |
| if (bstate & BUTTON_MODIFIER_SHIFT) |
| button |= PDC_BUTTON_SHIFT; |
| if (bstate & BUTTON_MODIFIER_CONTROL) |
| button |= PDC_BUTTON_CONTROL; |
| if (bstate & BUTTON_MODIFIER_ALT) |
| button |= PDC_BUTTON_ALT; |
| } |
| |
| SP->mouse_status.button[i] = button; |
| } |
| |
| if (bstate & BUTTON4_PRESSED) |
| SP->mouse_status.changes |= PDC_MOUSE_WHEEL_UP; |
| else if (bstate & BUTTON5_PRESSED) |
| SP->mouse_status.changes |= PDC_MOUSE_WHEEL_DOWN; |
| |
| return PDC_ungetch(KEY_MOUSE); |
| } |
| |
| bool has_mouse(void) |
| { |
| return PDC_has_mouse(); |
| } |