path: root/widgets/table/e-cell-popup.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */

/*
 * Author :
 *  Damon Chaplin <damon@ximian.com>
 *
 * Copyright 2001, Ximian, Inc.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

/*
 * ECellPopup - an abstract ECell class used to support popup selections like
 * a GtkCombo widget. It contains a child ECell, e.g. an ECellText, but when
 * selected it displays an arrow on the right edge which the user can click to
 * show a popup. Subclasses implement the popup class function to show the
 * popup.
 */

#include <config.h>
#include <gdk/gdkkeysyms.h>
#include "gal/util/e-util.h"
#include "e-table-item.h"
#include "e-cell-popup.h"


#define E_CELL_POPUP_ARROW_WIDTH    16
#define E_CELL_POPUP_ARROW_XPAD     3
#define E_CELL_POPUP_ARROW_YPAD     3


static void e_cell_popup_class_init (GtkObjectClass *object_class);
static void e_cell_popup_init   (ECellPopup *ecp);
static void e_cell_popup_destroy    (GtkObject  *object);


static ECellView* ecp_new_view      (ECell      *ecell,
                     ETableModel    *table_model,
                     void       *e_table_item_view);
static void ecp_kill_view       (ECellView  *ecv);
static void ecp_realize     (ECellView  *ecv);
static void ecp_unrealize       (ECellView  *ecv);
static void ecp_draw        (ECellView  *ecv,
                     GdkDrawable    *drawable,
                     int         model_col,
                     int         view_col,
                     int         row,
                     ECellFlags  flags,
                     int         x1,
                     int         y1,
                     int         x2,
                     int         y2);
static gint ecp_event       (ECellView  *ecv,
                     GdkEvent   *event,
                     int         model_col,
                     int         view_col,
                     int         row,
                     ECellFlags  flags,
                     ECellActions   *actions);
static int  ecp_height      (ECellView  *ecv,
                     int         model_col,
                     int         view_col,
                     int         row);
static void*    ecp_enter_edit      (ECellView  *ecv,
                     int         model_col,
                     int         view_col,
                     int         row);
static void ecp_leave_edit      (ECellView  *ecv,
                     int         model_col,
                     int         view_col,
                     int         row,
                     void       *edit_context);
static void ecp_print       (ECellView  *ecv,
                     GnomePrintContext *context, 
                     int         model_col,
                     int         view_col,
                     int         row,
                     double      width,
                     double      height);
static gdouble  ecp_print_height    (ECellView  *ecv,
                     GnomePrintContext *context, 
                     int         model_col,
                     int         view_col,
                     int         row,
                     double      width);
static int  ecp_max_width       (ECellView  *ecv,
                     int         model_col,
                     int         view_col);
static void ecp_show_tooltip    (ECellView  *ecv, 
                     int         model_col,
                     int         view_col,
                     int         row,
                     int         col_width,
                     ETableTooltip  *tooltip);

static gint e_cell_popup_do_popup   (ECellPopupView *ecp_view,
                     GdkEvent   *event);

static ECellClass *parent_class;


E_MAKE_TYPE (e_cell_popup, "ECellPopup", ECellPopup, e_cell_popup_class_init,
         e_cell_popup_init, e_cell_get_type());


static void
e_cell_popup_class_init     (GtkObjectClass *object_class)
{
    ECellClass *ecc = (ECellClass *) object_class;

    object_class->destroy = e_cell_popup_destroy;

    ecc->new_view     = ecp_new_view;
    ecc->kill_view    = ecp_kill_view;
    ecc->realize      = ecp_realize;
    ecc->unrealize    = ecp_unrealize;
    ecc->draw         = ecp_draw;
    ecc->event        = ecp_event;
    ecc->height       = ecp_height;
    ecc->enter_edit   = ecp_enter_edit;
    ecc->leave_edit   = ecp_leave_edit;
    ecc->print        = ecp_print;
    ecc->print_height = ecp_print_height;
    ecc->max_width    = ecp_max_width;
    ecc->show_tooltip = ecp_show_tooltip;

    parent_class = gtk_type_class (e_cell_get_type ());
}


static void
e_cell_popup_init       (ECellPopup *ecp)
{
    ecp->popup_shown = FALSE;
}


/**
 * e_cell_popup_new:
 *
 * Creates a new ECellPopup renderer.
 *
 * Returns: an ECellPopup object.
 */
ECell *
e_cell_popup_new        (void)
{
    ECellPopup *ecp = gtk_type_new (e_cell_popup_get_type ());

    return (ECell*) ecp;
}


/*
 * GtkObject::destroy method
 */
static void
e_cell_popup_destroy        (GtkObject *object)
{
    ECellPopup *ecp = E_CELL_POPUP (object);

    gtk_object_unref (GTK_OBJECT (ecp->child));

    GTK_OBJECT_CLASS (parent_class)->destroy (object);
}



/*
 * ECell::new_view method
 */
static ECellView *
ecp_new_view (ECell *ecell, ETableModel *table_model, void *e_table_item_view)
{
    ECellPopup *ecp = E_CELL_POPUP (ecell);
    ECellPopupView *ecp_view;
    
    /* We must have a child ECell before we create any views. */
    g_return_val_if_fail (ecp->child != NULL, NULL);

    ecp_view = g_new0 (ECellPopupView, 1);

    ecp_view->cell_view.ecell = ecell;
    ecp_view->cell_view.e_table_model = table_model;
    ecp_view->cell_view.e_table_item_view = e_table_item_view;

    ecp_view->child_view = e_cell_new_view (ecp->child, table_model,
                        e_table_item_view);

    return (ECellView*) ecp_view;
}


/*
 * ECell::kill_view method
 */
static void
ecp_kill_view (ECellView *ecv)
{
    ECellPopupView *ecp_view = (ECellPopupView *) ecv;

    if (ecp_view->child_view)
        e_cell_kill_view (ecp_view->child_view);
    g_free (ecp_view);
}


/*
 * ECell::realize method
 */
static void
ecp_realize (ECellView *ecv)
{
    ECellPopupView *ecp_view = (ECellPopupView *) ecv;

    e_cell_realize (ecp_view->child_view);

    if (parent_class->realize)
        (* parent_class->realize) (ecv);
}


/*
 * ECell::unrealize method
 */
static void
ecp_unrealize (ECellView *ecv)
{
    ECellPopupView *ecp_view = (ECellPopupView *) ecv;

    e_cell_unrealize (ecp_view->child_view);

    if (parent_class->unrealize)
        (* parent_class->unrealize) (ecv);
}


/*
 * ECell::draw method
 */
static void
ecp_draw (ECellView *ecv, GdkDrawable *drawable,
      int model_col, int view_col, int row, ECellFlags flags,
      int x1, int y1, int x2, int y2)
{
    ECellPopup *ecp = E_CELL_POPUP (ecv->ecell);
    ETableItem *eti = E_TABLE_ITEM (ecv->e_table_item_view);
    ECellPopupView *ecp_view = (ECellPopupView *) ecv;
    GtkWidget *canvas = GTK_WIDGET (GNOME_CANVAS_ITEM (ecv->e_table_item_view)->canvas);
    GtkShadowType shadow;
    GdkRectangle rect;
    gboolean show_popup_arrow = FALSE;

    /* Display the popup arrow if we are editing this cell, or the popup
       is shown for this cell. */
    if (eti->editing_col == view_col && eti->editing_row == row) {
        show_popup_arrow = TRUE;
        ecp->popup_arrow_shown = TRUE;

    } else if (ecp->popup_shown && ecp->popup_view_col == view_col
           && ecp->popup_row == row) {
        show_popup_arrow = TRUE;
    }

    if (eti->editing_col == -1)
        ecp->popup_arrow_shown = FALSE;

#if 0
    g_print ("In ecp_draw row:%i col: %i %i,%i %i,%i Show Arrow:%i\n",
         row, view_col, x1, y1, x2, y2, show_popup_arrow);
#endif

    if (show_popup_arrow) {
        e_cell_draw (ecp_view->child_view, drawable, model_col,
                 view_col, row, flags,
                 x1, y1, x2 - E_CELL_POPUP_ARROW_WIDTH, y2);

        rect.x = x2 - E_CELL_POPUP_ARROW_WIDTH;
        rect.y = y1 + 1;
        rect.width = E_CELL_POPUP_ARROW_WIDTH;
        rect.height = y2 - y1 - 2;

        if (ecp->popup_shown)
            shadow = GTK_SHADOW_IN;
        else
            shadow = GTK_SHADOW_OUT;

        gtk_paint_box (canvas->style, drawable,
                   GTK_STATE_NORMAL, shadow,
                   &rect, canvas, "ecellpopup",
                   rect.x, rect.y, rect.width, rect.height);
        gtk_paint_arrow (canvas->style, drawable,
                 GTK_STATE_NORMAL, shadow,
                 &rect, canvas, NULL,
                 GTK_ARROW_DOWN, TRUE,
                 rect.x + E_CELL_POPUP_ARROW_XPAD,
                 rect.y + E_CELL_POPUP_ARROW_YPAD,
                 rect.width - E_CELL_POPUP_ARROW_XPAD * 2,
                 rect.height - E_CELL_POPUP_ARROW_YPAD * 2);
    } else {
        e_cell_draw (ecp_view->child_view, drawable, model_col,
                 view_col, row, flags, x1, y1, x2, y2);
    }
}


/*
 * ECell::event method
 */
static gint
ecp_event (ECellView *ecv, GdkEvent *event, int model_col, int view_col,
       int row, ECellFlags flags, ECellActions *actions)
{
    ECellPopupView *ecp_view = (ECellPopupView *) ecv;
    ECellPopup *ecp = E_CELL_POPUP (ecp_view->cell_view.ecell);
    ETableItem *eti = E_TABLE_ITEM (ecv->e_table_item_view);
    int width;

    switch (event->type) {
    case GDK_BUTTON_PRESS:
        if (eti->editing_col == view_col && eti->editing_row == row
            && ecp->popup_arrow_shown) {
            width = e_table_header_col_diff (eti->header, view_col,
                             view_col + 1);

            g_print ("Event in item popup width: %i button: %g,%g\n",
                 width, event->button.x, event->button.y);

            /* FIXME: The event coords seem to be relative to the
               text within the cell, so we have to add 4. */
            if (event->button.x + 4 >= width - E_CELL_POPUP_ARROW_WIDTH) {
                return e_cell_popup_do_popup (ecp_view, event);
            }
        }
        break;
    case GDK_BUTTON_RELEASE:
        break;
    case GDK_KEY_PRESS:
        if (event->key.state & GDK_MOD1_MASK
            && event->key.keyval == GDK_Down) {
            g_print ("## Alt-Down pressed\n");
            return e_cell_popup_do_popup (ecp_view, event);
        }
        g_print ("Key Press Event ECellPopup\n");
        break;
    default:
        break;
    }

    return e_cell_event (ecp_view->child_view, event, model_col, view_col,
                 row, flags, actions);
}


/*
 * ECell::height method
 */
static int
ecp_height (ECellView *ecv, int model_col, int view_col, int row) 
{
    ECellPopupView *ecp_view = (ECellPopupView *) ecv;

    return e_cell_height (ecp_view->child_view, model_col, view_col, row);
}


/*
 * ECellView::enter_edit method
 */
static void *
ecp_enter_edit (ECellView *ecv, int model_col, int view_col, int row)
{
    ECellPopupView *ecp_view = (ECellPopupView *) ecv;
    ECellPopup *ecp = E_CELL_POPUP (ecp_view->cell_view.ecell);

    g_print ("In ecp_enter_edit model_col: %i view_col: %i row: %i\n",
         model_col, view_col, row);

    if (ecp->popup_view_col != view_col || ecp->popup_row != row)
        ecp->popup_arrow_shown = FALSE;

    ecp->popup_view_col = view_col;
    ecp->popup_row = row;

    return e_cell_enter_edit (ecp_view->child_view, model_col, view_col, row);
}


/*
 * ECellView::leave_edit method
 */
static void
ecp_leave_edit (ECellView *ecv, int model_col, int view_col, int row,
        void *edit_context)
{
    ECellPopupView *ecp_view = (ECellPopupView *) ecv;

    g_print ("In ecp_leave_edit model_col: %i view_col: %i row: %i\n",
         model_col, view_col, row);

    e_cell_leave_edit (ecp_view->child_view, model_col, view_col, row,
               edit_context);
}


static void
ecp_print (ECellView *ecv, GnomePrintContext *context, 
       int model_col, int view_col, int row, double width, double height)
{
    ECellPopupView *ecp_view = (ECellPopupView *) ecv;

    e_cell_print (ecp_view->child_view, context, model_col, view_col, row,
              width, height);
}


static gdouble
ecp_print_height (ECellView *ecv, GnomePrintContext *context, 
          int model_col, int view_col, int row,
          double width)
{
    ECellPopupView *ecp_view = (ECellPopupView *) ecv;

    return e_cell_print_height (ecp_view->child_view, context, model_col,
                    view_col, row, width);
}


static int
ecp_max_width (ECellView *ecv,
           int model_col,
           int view_col)
{
    ECellPopupView *ecp_view = (ECellPopupView *) ecv;

    return e_cell_max_width (ecp_view->child_view, model_col, view_col);
}


static void
ecp_show_tooltip (ECellView *ecv, 
          int model_col,
          int view_col,
          int row,
          int col_width,
          ETableTooltip *tooltip)
{
    ECellPopupView *ecp_view = (ECellPopupView *) ecv;

    e_cell_show_tooltip (ecp_view->child_view, model_col, view_col, row,
                 col_width, tooltip);
}



ECell*
e_cell_popup_get_child          (ECellPopup *ecp)
{
    g_return_val_if_fail (E_IS_CELL_POPUP (ecp), NULL);

    return ecp->child;
}


void
e_cell_popup_set_child          (ECellPopup *ecp,
                     ECell      *child)
{
    g_return_if_fail (E_IS_CELL_POPUP (ecp));

    if (ecp->child)
        gtk_object_unref (GTK_OBJECT (ecp->child));

    ecp->child = child;
    gtk_object_ref (GTK_OBJECT (child));
}


static gint
e_cell_popup_do_popup           (ECellPopupView *ecp_view,
                     GdkEvent   *event)
{
    ECellPopup *ecp = E_CELL_POPUP (ecp_view->cell_view.ecell);
    gint (*popup_func) (ECellPopup *ecp, GdkEvent *event);

    ecp->popup_cell_view = ecp_view;

    popup_func = E_CELL_POPUP_CLASS (GTK_OBJECT (ecp)->klass)->popup;

    return popup_func ? popup_func (ecp, event) : FALSE;
}