mouse.hcc

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/******** System Includes *************/
#include <stdlib.hch>

#include "pal_master.hch"
#include "pal_mouse.hch"

/******** Application Includes ********/
#include "configuration.hch"
#include "mouse_shared.hch"
#include "mouse.hch"

#if HAVE_DEBUG
        #include "debug.hch"
#endif



void mouse_main(mousedata_t *mousedata) {
        unsigned 18 touch_sampler;
        unsigned 10 x, oldx;
        unsigned 9 y, oldy;
        unsigned 3 mousestate, oldmousestate;
        unsigned 1 touch, touched, oldtouched;

        /*
         * We only check for mouse states once every 2^18 time. This to
         * overcome the sampling of the 'Touch' state of the RC200 libs. When
         * using newer libs this might be overkill, e.g. smaller values may
         * work or sampling all together will be redundant.
         */
        touch_sampler = 1;
        while (TRUE) {
                if (!touch_sampler) {
                        /*
                         * We are here ready to set mouse states. We compare
                         * current and previous states and thereby determine
                         * the state to send to others
                         */
                        if (touched) {
                                if(oldtouched) {
                                        mousestate = MOUSE_STATE_DOWN;
                                } else {
                                        mousestate = MOUSE_STATE_ON_PRESS;
                                }
                                oldtouched = TRUE;
                        } else {
                                if(oldtouched) {
                                        mousestate = MOUSE_STATE_ON_RELEASE;
                                } else {
                                        mousestate = MOUSE_STATE_UP;
                                }
                                oldtouched = FALSE;
                        }
                        /*
                         * We have now processed our Touch. Reset it for the
                         * next run.
                         */
                        touched = FALSE;

                        /*
                         * In the rare occurance that we receive values
                         * beyond our range, we set them to some sane
                         * values here.
                         */
                         x = (x > 639) ? 0 : x;
                         y = (y > 479) ? 0 : y;

                        /*
                         * Compare Previous States and Coordinates to determine
                         * wether they have changed. If so, Copy them into
                         * shared memory, notify the listening processes and
                         * Set the new as previous values for the next run. We
                         * can only do this when the display has handled all
                         * changes.
                         */
                        if (((oldmousestate != mousestate) || (oldx != x) || (oldy != y)) && (MOUSE_NOT_UPDATED == mousedata->status)) {
                                //par {
                                        oldx = x;
                                        oldy = y;
                                        oldmousestate = mousestate;
                                        mousedata->x = x;
                                        mousedata->y = 0 @ y;
                                        mousedata->state = mousestate;
                                        mousedata->status = MOUSE_UPDATED;
                                //}
                        }
                }

                /*
                 * Read the current X and Y of the 'cursor' and register wether
                 * the display was touched. If touched store this in a local
                 * store. This we do to catch the sampling of the RC200 lib.
                 */
                RC200TouchScreenReadScaled(&x, &y, &touch);
                if (touch) {
                        touched = TRUE;
                }

                touch_sampler++;
        }
} /* --- mouse_main() --- */

---