guiobject.cpp

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/***************************************************************************
                                guiobject.cpp                      
                             -------------------                                         
    created              : Fri Aug 13 22:25:06 CEST 1999
    copyright            : (C) 1999 by Eric Espie                         
    email                : torcs@free.fr   
    version              : $Id$                                  
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/


#ifdef WIN32
#include <windows.h>
#endif
#include <tgfclient.h>
#include "gui.h"

void
gfuiObjectInit(void)
{
}

void 
gfuiPrintString(int x, int y, GfuiFontClass *font, const char *string)
{
    glEnable(GL_TEXTURE_2D);
    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
    glEnable(GL_ALPHA_TEST);
    glAlphaFunc(GL_GREATER, 0.1) ;
    font->output(x, y, string);
    glDisable(GL_ALPHA_TEST);
    glDisable(GL_TEXTURE_2D);
}

void GfuiPrintString(const char *text, float *fgColor, int font, int x, int y, int align)
{
    glEnable(GL_TEXTURE_2D);
    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
    glEnable(GL_ALPHA_TEST);
    glAlphaFunc(GL_GREATER, 0.1) ;
    glColor4fv(fgColor);
    switch(align&0xF0) {
        case 0x00 /* LEFT */:
            gfuiFont[font]->output(x, y, text);
            break;
        case 0x10 /* CENTER */:
            gfuiFont[font]->output(x - gfuiFont[font]->getWidth(text) / 2, y, text);
            break;
        case 0x20 /* RIGHT */:
            gfuiFont[font]->output(x - gfuiFont[font]->getWidth(text), y, text);
            break;
    }
    glDisable(GL_ALPHA_TEST);
    glDisable(GL_TEXTURE_2D);
}

int GfuiFontHeight(int font)
{
    return gfuiFont[font]->getHeight();
}

int GfuiFontWidth(int font, const char *text)
{
    return gfuiFont[font]->getWidth(text);
}

void
GfuiDrawCursor()
{
    float xf = (float)(GfuiMouse.X);
    float yf = (float)(GfuiMouse.Y);

#define SCALE 1.3
    
    glColor4fv(GfuiScreen->mouseColor[0]) ;
    glBegin(GL_TRIANGLES);
    glVertex2f(xf, yf);
    glVertex2f(xf + 4.8 * SCALE, yf - 10.4 * SCALE);
    glVertex2f(xf + 6.4 * SCALE, yf - 6.4 * SCALE);
    glEnd();

    glBegin(GL_QUADS);
    glVertex2f(xf + 5.6 * SCALE, yf - 6.4 * SCALE);
    glVertex2f(xf + 6 * SCALE, yf - 6 * SCALE);
    glVertex2f(xf + 12.4 * SCALE, yf - 12.4 * SCALE);
    glVertex2f(xf + 12 * SCALE, yf - 12.8 * SCALE);
    glEnd();

    glColor4fv(GfuiScreen->mouseColor[1]) ;
    glBegin(GL_TRIANGLES);
    glVertex2f(xf, yf) ;
    glVertex2f(xf + 10.4 * SCALE, yf - 4.8 * SCALE);
    glVertex2f(xf + 6.4 * SCALE, yf - 6.4 * SCALE);
    glEnd();

    glBegin(GL_QUADS);
    glVertex2f(xf + 6 * SCALE, yf - 6 * SCALE);
    glVertex2f(xf + 6.4 * SCALE, yf - 4.8 * SCALE);
    glVertex2f(xf + 12.8 * SCALE, yf - 12 * SCALE);
    glVertex2f(xf + 12.4 * SCALE, yf - 12.4 * SCALE);  
    glEnd();

}

void
GfuiDraw(tGfuiObject *obj)
{
    if (obj->visible) {
    switch (obj->widget){
    case GFUI_LABEL:
        gfuiDrawLabel(obj);
        break;
    
    case GFUI_BUTTON:
        gfuiDrawButton(obj);
        break;

    case GFUI_GRBUTTON:
        gfuiDrawGrButton(obj);
        break;

    case GFUI_SCROLLIST:
        gfuiDrawScrollist(obj);
        break;
    
    case GFUI_EDITBOX:
        gfuiDrawEditbox(obj);
        break;

    case GFUI_IMAGE:
        gfuiDrawImage(obj);
        break;
    }
    }
}


static int
gfuiMouseIn(tGfuiObject *obj)
{
    if ((GfuiMouse.X >= obj->xmin) &&
    (GfuiMouse.X <= obj->xmax) &&
    (GfuiMouse.Y >= obj->ymin) &&
    (GfuiMouse.Y <= obj->ymax)) {
    return 1;
    }
    return 0;
}

void
GfuiUnSelectCurrent(void)
{
    tGfuiButton     *button;
    tGfuiEditbox    *editbox;
    tGfuiGrButton   *grbutton;
    tGfuiObject     *obj;

    obj = GfuiScreen->hasFocus;
    if (obj == NULL) {
    return;
    }
    GfuiScreen->hasFocus = (tGfuiObject*)NULL;
    obj->focus = 0;
    switch (obj->widget) {
    case GFUI_BUTTON:
    button = &(obj->u.button);
    button->state = GFUI_BTN_RELEASED;
    if (button->onFocusLost != NULL) {
        button->onFocusLost(button->userDataOnFocus);
    }
    break;
    case GFUI_GRBUTTON:
    grbutton = &(obj->u.grbutton);
    grbutton->state = GFUI_BTN_RELEASED;
    if (grbutton->onFocusLost != NULL) {
        grbutton->onFocusLost(grbutton->userDataOnFocus);
    }
    break;
    case GFUI_EDITBOX:
    editbox = &(obj->u.editbox);
    editbox->state = GFUI_BTN_RELEASED; 
    if (editbox->onFocusLost != NULL) {
        editbox->onFocusLost(editbox->userDataOnFocus);
    }
    break;
    }
}

static void
gfuiLoseFocus(tGfuiObject *obj)
{
    if (obj->state == GFUI_DISABLE) {
        return;
    }

    tGfuiButton     *button;
    tGfuiEditbox    *editbox;
    tGfuiGrButton   *grbutton;

    GfuiScreen->hasFocus = (tGfuiObject*)NULL;
    obj->focus = 0;
    switch (obj->widget) {
    case GFUI_BUTTON:
    button = &(obj->u.button);
    button->state = GFUI_BTN_RELEASED;
    if (button->onFocusLost != NULL) {
        button->onFocusLost(button->userDataOnFocus);
    }
    break;
    case GFUI_GRBUTTON:
    grbutton = &(obj->u.grbutton);
    grbutton->state = GFUI_BTN_RELEASED;
    if (grbutton->onFocusLost != NULL) {
        grbutton->onFocusLost(grbutton->userDataOnFocus);
    }
    break;
    case GFUI_EDITBOX:
    editbox = &(obj->u.editbox);
    editbox->state = GFUI_BTN_RELEASED; 
    if (editbox->onFocusLost != NULL) {
        editbox->onFocusLost(editbox->userDataOnFocus);
    }
    break;
    }
}

static void
gfuiSetFocus(tGfuiObject *obj)
{
    if (obj->state == GFUI_DISABLE) {
        return;
    }

    tGfuiButton     *button;
    tGfuiEditbox    *editbox;
    tGfuiGrButton   *grbutton;
    
    if (GfuiScreen->hasFocus != NULL) {
    gfuiLoseFocus(GfuiScreen->hasFocus);
    }
    GfuiScreen->hasFocus = obj;
    obj->focus = 1;
    switch (obj->widget) {
    case GFUI_BUTTON:
    button = &(obj->u.button);
    if (button->onFocus != NULL) {
        button->onFocus(button->userDataOnFocus);
    }
    break;
    case GFUI_GRBUTTON:
    grbutton = &(obj->u.grbutton);
    if (grbutton->onFocus != NULL) {
        grbutton->onFocus(grbutton->userDataOnFocus);
    }
    break;
    case GFUI_EDITBOX:
    editbox = &(obj->u.editbox);
    if (editbox->onFocus != NULL) {
        editbox->onFocus(editbox->userDataOnFocus);
    }
    break;
    }
}

void
gfuiUpdateFocus(void)
{
    tGfuiObject *curObject;
    
    curObject = GfuiScreen->hasFocus;
    if (curObject != NULL) {
    if (gfuiMouseIn(curObject)) {
        return; /* focus has not changed */
    }
    if (curObject->focusMode != GFUI_FOCUS_MOUSE_CLICK) {
        gfuiLoseFocus(GfuiScreen->hasFocus);
        GfuiScreen->hasFocus = (tGfuiObject*)NULL;
    }
    }
    
    /* Search for a new focused object */
    curObject = GfuiScreen->objects;
    if (curObject != NULL) {
    do {
        curObject = curObject->next;
        if ((curObject->visible == 0) ||
        (curObject->focusMode == GFUI_FOCUS_NONE) ||
        ((curObject->focusMode == GFUI_FOCUS_MOUSE_CLICK) && (GfuiScreen->mouse == 0))) {
        continue;
        }
        if (gfuiMouseIn(curObject)) {
        gfuiSetFocus(curObject);
        break;
        }
    } while (curObject != GfuiScreen->objects);
    }
}

void
gfuiSelectNext(void * /* dummy */)
{
    tGfuiObject *startObject;
    tGfuiObject *curObject;
    
    startObject = GfuiScreen->hasFocus;
    if (startObject == NULL) {
    startObject = GfuiScreen->objects;
    }
    if (startObject == NULL) {
    return;
    }
    curObject = startObject;
    do {
    switch (curObject->widget) {
    case GFUI_SCROLLIST:
        gfuiScrollListNextElt(curObject);
        break;
        
    default:
        curObject = curObject->next;
        if ((curObject->focusMode != GFUI_FOCUS_NONE) &&
        (curObject->state != GFUI_DISABLE) &&
        (curObject->visible)) {
        gfuiSetFocus(curObject);
        return;
        }
        break;
    }
    } while (curObject != startObject);    
}

void
gfuiSelectPrev(void * /* dummy */)
{
    tGfuiObject *startObject;
    tGfuiObject *curObject;
    
    startObject = GfuiScreen->hasFocus;
    if (startObject == NULL) {
    startObject = GfuiScreen->objects;
    if (startObject == NULL) {
        return;
    }
    startObject = startObject->next;
    }
    curObject = startObject;
    do {
    switch (curObject->widget) {
    case GFUI_SCROLLIST:
        gfuiScrollListPrevElt(curObject);
        break;

    default:
        curObject = curObject->prev;
        if ((curObject->focusMode != GFUI_FOCUS_NONE) &&
        (curObject->state != GFUI_DISABLE) &&
        (curObject->visible)) {
        gfuiSetFocus(curObject);
        return;
        }
        break;
    }
    } while (curObject != startObject);
}

void 
gfuiSelectId(void *scr, int id)
{
    tGfuiObject *curObject;
    tGfuiScreen *screen = (tGfuiScreen*)scr;
    
    curObject = screen->objects;
    if (curObject != NULL) {
    do {
        curObject = curObject->next;
        if (curObject->id == id) {
        gfuiSetFocus(curObject);
        break;
        }
    } while (curObject != screen->objects);
    }
}

int
GfuiVisibilitySet(void *scr, int id, int visible)
{
    tGfuiObject *curObject;
    
    curObject = gfuiGetObject(scr, id);
    if (curObject == NULL) {
    return -1;
    }
    switch(visible) {
    case GFUI_VISIBLE:
    curObject->visible = GFUI_VISIBLE;
    break;
    case GFUI_INVISIBLE:
    curObject->visible = GFUI_INVISIBLE;
    break;
    default:
    return -1;
    }
    return 0;
}

int 
GfuiEnable(void *scr, int id, int flag)
{
    tGfuiObject *curObject;

    curObject = gfuiGetObject(scr, id);
    if (curObject == NULL) {
    return -1;
    }
    switch(flag) {
    case GFUI_ENABLE:
    curObject->state = GFUI_ENABLE;
    break;
    case GFUI_DISABLE:
    curObject->state = GFUI_DISABLE;
    break;
    default:
    return -1;
    }
    return 0;
}

void
gfuiMouseAction(void *vaction)
{
    tGfuiObject *curObject;
    long    action = (long)vaction;

    curObject = GfuiScreen->hasFocus;
    if (curObject != NULL) {
        if (curObject->state == GFUI_DISABLE) {
            return;
        }
        
        switch (curObject->widget) {
        case GFUI_BUTTON:
            gfuiButtonAction((int)action);
            break;
        case GFUI_GRBUTTON:
            gfuiGrButtonAction((int)action);
            break;
        case GFUI_SCROLLIST:
            gfuiScrollListAction((int)action);
            break;
        case GFUI_EDITBOX:
            gfuiEditboxAction((int)action);
            break;
        }
    }
}

void
gfuiAddObject(tGfuiScreen *screen, tGfuiObject *object)
{
    if (screen->objects == NULL) {
    screen->objects = object;
    object->next = object;
    object->prev = object;
    } else {
    object->next = screen->objects->next;
    object->prev = screen->objects;
    screen->objects->next = object;
    object->next->prev = object;
    screen->objects = object;
    }
}

tGfuiObject * 
gfuiGetObject(void *scr, int id)
{
    tGfuiObject *curObject;
    tGfuiScreen *screen = (tGfuiScreen*)scr;
    
    curObject = screen->objects;
    if (curObject != NULL) {
    do {
        curObject = curObject->next;
        if (curObject->id == id) {
        return curObject;
        }
    } while (curObject != screen->objects);
    }
    return (tGfuiObject *)NULL;
}


void
gfuiReleaseObject(tGfuiObject *curObject)
{
    switch (curObject->widget){
    case GFUI_LABEL:
    gfuiReleaseLabel(curObject);
    break;
    
    case GFUI_BUTTON:
    gfuiReleaseButton(curObject);
    break;
    
    case GFUI_GRBUTTON:
    gfuiReleaseGrButton(curObject);
    break;
    
    case GFUI_SCROLLIST:
    gfuiReleaseScrollist(curObject);
    break;

    case GFUI_SCROLLBAR:
    gfuiReleaseScrollbar(curObject);
    break;

    case GFUI_EDITBOX:
    gfuiReleaseEditbox(curObject);
    break;
    case GFUI_IMAGE:
    gfuiReleaseImage(curObject);
    break;
    }
}