path: root/widgets/table/e-table-click-to-add.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* 
 * e-table-click-to-add.c
 * Copyright 2000, 2001, Ximian, Inc.
 *
 * Authors:
 *   Chris Lahey <clahey@ximian.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License, version 2, as published by the Free Software Foundation.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#include <config.h>
#include <gdk/gdkkeysyms.h>
#include <gtk/gtksignal.h>
#include <libgnomeui/gnome-canvas.h>
#include <libgnomeui/gnome-canvas-util.h>
#include <libgnomeui/gnome-canvas-rect-ellipse.h>
#include <gdk-pixbuf/gdk-pixbuf.h>

#include "e-table-header.h"
#include "e-table-click-to-add.h"
#include "e-table-defines.h"
#include "e-table-one.h"
#include "gal/e-text/e-text.h"
#include "gal/widgets/e-canvas.h"
#include "gal/widgets/e-canvas-utils.h"
#include "gal/util/e-util.h"

enum {
    CURSOR_CHANGE,
    LAST_SIGNAL
};

static guint etcta_signals [LAST_SIGNAL] = { 0 };

#define PARENT_OBJECT_TYPE gnome_canvas_group_get_type ()

#define ELEMENTS(x) (sizeof (x) / sizeof (x[0]))

static GnomeCanvasGroupClass *etcta_parent_class;

enum {
    ARG_0,
    ARG_HEADER,
    ARG_MODEL,
    ARG_MESSAGE,
    ARG_WIDTH,
    ARG_HEIGHT
};

static void
etcta_cursor_change (GtkObject *object, gint row, gint col, ETableClickToAdd *etcta)
{
    gtk_signal_emit (GTK_OBJECT (etcta),
             etcta_signals [CURSOR_CHANGE],
             row, col);
}

static void
etcta_add_table_header (ETableClickToAdd *etcta, ETableHeader *header)
{
    etcta->eth = header;
    if (etcta->eth)
        gtk_object_ref (GTK_OBJECT (etcta->eth));
    if (etcta->row)
        gnome_canvas_item_set(GNOME_CANVAS_ITEM(etcta->row),
                      "ETableHeader", header,
                      NULL);
}

static void
etcta_drop_table_header (ETableClickToAdd *etcta)
{
    GtkObject *header;
    
    if (!etcta->eth)
        return;

    header = GTK_OBJECT (etcta->eth);

    gtk_object_unref (header);
    etcta->eth = NULL;
}

static void
etcta_add_one (ETableClickToAdd *etcta, ETableModel *one)
{
    etcta->one = one;
    if (etcta->one)
        gtk_object_ref (GTK_OBJECT(etcta->one));
    if (etcta->row)
        gnome_canvas_item_set(GNOME_CANVAS_ITEM(etcta->row),
                      "ETableModel", one,
                      NULL);
    gtk_object_set(GTK_OBJECT(etcta->selection),
               "model", one,
               NULL);
}

static void
etcta_drop_one (ETableClickToAdd *etcta)
{
    if (!etcta->one)
        return;
    gtk_object_unref (GTK_OBJECT(etcta->one));
    etcta->one = NULL;
    gtk_object_set(GTK_OBJECT(etcta->selection),
               "model", NULL,
               NULL);
}

static void
etcta_add_model (ETableClickToAdd *etcta, ETableModel *model)
{
    etcta->model = model;
    if (etcta->model)
        gtk_object_ref (GTK_OBJECT(etcta->model));
}

static void
etcta_drop_model (ETableClickToAdd *etcta)
{
    etcta_drop_one (etcta);
    if (!etcta->model)
        return;
    gtk_object_unref (GTK_OBJECT(etcta->model));
    etcta->model = NULL;
}

static void
etcta_add_message (ETableClickToAdd *etcta, char *message)
{
    etcta->message = g_strdup(message);
}

static void
etcta_drop_message (ETableClickToAdd *etcta)
{
    g_free(etcta->message);
    etcta->message = NULL;
}


static void
etcta_destroy (GtkObject *object){
    ETableClickToAdd *etcta = E_TABLE_CLICK_TO_ADD (object);

    etcta_drop_table_header (etcta);
    etcta_drop_model (etcta);
    etcta_drop_message (etcta);
    gtk_object_unref(GTK_OBJECT(etcta->selection));

    if (GTK_OBJECT_CLASS (etcta_parent_class)->destroy)
        (*GTK_OBJECT_CLASS (etcta_parent_class)->destroy) (object);
}

static void
etcta_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
{
    GnomeCanvasItem *item;
    ETableClickToAdd *etcta;

    item = GNOME_CANVAS_ITEM (o);
    etcta = E_TABLE_CLICK_TO_ADD (o);

    switch (arg_id){
    case ARG_HEADER:
        etcta_drop_table_header (etcta);
        etcta_add_table_header (etcta, E_TABLE_HEADER(GTK_VALUE_OBJECT (*arg)));
        break;
    case ARG_MODEL:
        etcta_drop_model (etcta);
        etcta_add_model (etcta, E_TABLE_MODEL(GTK_VALUE_OBJECT (*arg)));
        break;
    case ARG_MESSAGE:
        etcta_drop_message (etcta);
        etcta_add_message (etcta, GTK_VALUE_STRING (*arg));
        break;
    case ARG_WIDTH:
        etcta->width = GTK_VALUE_DOUBLE (*arg);
        if (etcta->row)
            gnome_canvas_item_set(etcta->row,
                          "minimum_width", etcta->width,
                          NULL);
        if (etcta->text)
            gnome_canvas_item_set(etcta->text,
                          "width", etcta->width - 4,
                          NULL);
        if (etcta->rect)
            gnome_canvas_item_set(etcta->rect,
                          "x2", etcta->width - 1,
                          NULL);
        break;
    }
    gnome_canvas_item_request_update(item);
}

static void
etcta_get_arg (GtkObject *o, GtkArg *arg, guint arg_id)
{
    ETableClickToAdd *etcta;

    etcta = E_TABLE_CLICK_TO_ADD (o);

    switch (arg_id){
    case ARG_HEADER:
        GTK_VALUE_OBJECT (*arg) = GTK_OBJECT(etcta->eth);
        break;
    case ARG_MODEL:
        GTK_VALUE_OBJECT (*arg) = GTK_OBJECT(etcta->model);
        break;
    case ARG_MESSAGE:
        GTK_VALUE_STRING (*arg) = g_strdup(etcta->message);
        break;
    case ARG_WIDTH:
        GTK_VALUE_DOUBLE (*arg) = etcta->width;
        break;
    case ARG_HEIGHT:
        GTK_VALUE_DOUBLE (*arg) = etcta->height;
        break;
    default:
        arg->type = GTK_TYPE_INVALID;
        break;
    }
}

static void
etcta_realize (GnomeCanvasItem *item)
{
    ETableClickToAdd *etcta = E_TABLE_CLICK_TO_ADD (item);

    etcta->rect = gnome_canvas_item_new(GNOME_CANVAS_GROUP(item),
                        gnome_canvas_rect_get_type(),
                        "x1", (double) 0,
                        "y1", (double) 0,
                        "x2", (double) etcta->width - 1,
                        "y2", (double) etcta->height - 1,
                        "outline_color", "black", 
                        "fill_color", "white",
                        NULL);

    etcta->text = gnome_canvas_item_new(GNOME_CANVAS_GROUP(item),
                        e_text_get_type(),
                        "text", etcta->message ? etcta->message : "",
                        "anchor", GTK_ANCHOR_NW,
                        "width", etcta->width - 4,
                        "draw_background", FALSE,
                        NULL);
    e_canvas_item_move_absolute (etcta->text, 2, 2);

    if (GNOME_CANVAS_ITEM_CLASS (etcta_parent_class)->realize)
        (*GNOME_CANVAS_ITEM_CLASS (etcta_parent_class)->realize)(item);
}

static void
etcta_unrealize (GnomeCanvasItem *item)
{
    if (GNOME_CANVAS_ITEM_CLASS (etcta_parent_class)->unrealize)
        (*GNOME_CANVAS_ITEM_CLASS (etcta_parent_class)->unrealize)(item);
}

static void finish_editing (ETableClickToAdd *etcta);

static int
item_key_press (ETableItem *item, int row, int col, GdkEvent *event, ETableClickToAdd *etcta)
{
    switch (event->key.keyval) {
        case GDK_Return:
        case GDK_KP_Enter:
        case GDK_ISO_Enter:
        case GDK_3270_Enter:
            finish_editing(etcta);
            return TRUE;
    }
    return FALSE;
}

static void
set_initial_selection (ETableClickToAdd *etcta)
{
    e_selection_model_do_something (E_SELECTION_MODEL(etcta->selection), 
                    0, e_table_header_prioritized_column (etcta->eth), 
                    0);
}

static void
finish_editing (ETableClickToAdd *etcta)
{
    if (etcta->row) {
        ETableModel *one;

        e_table_one_commit(E_TABLE_ONE(etcta->one));
        etcta_drop_one (etcta);
        gtk_object_destroy(GTK_OBJECT(etcta->row));
        etcta->row = NULL;

        one = e_table_one_new(etcta->model);
        etcta_add_one (etcta, one);
        gtk_object_unref(GTK_OBJECT(one));

        e_selection_model_clear(E_SELECTION_MODEL(etcta->selection));

        etcta->row = gnome_canvas_item_new(GNOME_CANVAS_GROUP(etcta),
                           e_table_item_get_type(),
                           "ETableHeader", etcta->eth,
                           "ETableModel", etcta->one,
                           "minimum_width", etcta->width,
                           "horizontal_draw_grid", TRUE,
                           "vertical_draw_grid", TRUE,
                           "selection_model", etcta->selection,
                           "cursor_mode", E_CURSOR_SPREADSHEET,
                           NULL);

        gtk_signal_connect(GTK_OBJECT(etcta->row), "key_press",
                   GTK_SIGNAL_FUNC(item_key_press), etcta);

        set_initial_selection (etcta);
    }
}

/*
 * Handles the events on the ETableClickToAdd, particularly it creates the ETableItem and passes in some events.
 */
static int
etcta_event (GnomeCanvasItem *item, GdkEvent *e)
{
    ETableClickToAdd *etcta = E_TABLE_CLICK_TO_ADD (item);

    switch (e->type){
    case GDK_BUTTON_PRESS:
        if (etcta->text) {
            gtk_object_destroy(GTK_OBJECT(etcta->text));
            etcta->text = NULL;
        }
        if (etcta->rect) {
            gtk_object_destroy(GTK_OBJECT(etcta->rect));
            etcta->rect = NULL;
        }
        if (!etcta->row) {
            ETableModel *one;

            one = e_table_one_new(etcta->model);
            etcta_add_one (etcta, one);
            gtk_object_unref(GTK_OBJECT(one));
            
            e_selection_model_clear(E_SELECTION_MODEL(etcta->selection));

            etcta->row = gnome_canvas_item_new(GNOME_CANVAS_GROUP(item),
                               e_table_item_get_type(),
                               "ETableHeader", etcta->eth,
                               "ETableModel", etcta->one,
                               "minimum_width", etcta->width,
                               "horizontal_draw_grid", TRUE,
                               "vertical_draw_grid", TRUE,
                               "selection_model", etcta->selection,
                               "cursor_mode", E_CURSOR_SPREADSHEET,
                               NULL);

            gtk_signal_connect(GTK_OBJECT(etcta->row), "key_press",
                       GTK_SIGNAL_FUNC(item_key_press), etcta);

            e_canvas_item_grab_focus (GNOME_CANVAS_ITEM(etcta->row), TRUE);

            set_initial_selection (etcta);
        }
        break;

    case GDK_KEY_PRESS:
        switch (e->key.keyval) {
        case GDK_Tab:
        case GDK_KP_Tab:
        case GDK_ISO_Left_Tab:
            finish_editing (etcta);
            break;
        default:
            return FALSE;
            break;
        }
            
    default:
        return FALSE;
    }
    return TRUE;
}

static void
etcta_reflow (GnomeCanvasItem *item, int flags)
{
    ETableClickToAdd *etcta = E_TABLE_CLICK_TO_ADD (item);
    
    double old_height = etcta->height;
    
    if (etcta->text) {
        gtk_object_get(GTK_OBJECT(etcta->text),
                   "height", &etcta->height,
                   NULL);
        etcta->height += 6;
    }
    if (etcta->row) {
        gtk_object_get(GTK_OBJECT(etcta->row),
                   "height", &etcta->height,
                   NULL);
    }

    if (etcta->rect) {
        gtk_object_set(GTK_OBJECT(etcta->rect),
                   "y2", etcta->height - 1,
                   NULL);
    }
    if (old_height != etcta->height)
        e_canvas_item_request_parent_reflow(item);
}

static void
etcta_class_init (ETableClickToAddClass *klass)
{
    GnomeCanvasItemClass *item_class = GNOME_CANVAS_ITEM_CLASS(klass);
    GtkObjectClass *object_class = GTK_OBJECT_CLASS(klass);

    etcta_parent_class = gtk_type_class (PARENT_OBJECT_TYPE);

    klass->cursor_change = NULL;

    object_class->destroy = etcta_destroy;
    object_class->set_arg = etcta_set_arg;
    object_class->get_arg = etcta_get_arg;

    item_class->realize     = etcta_realize;
    item_class->unrealize   = etcta_unrealize;
    item_class->event       = etcta_event;

    gtk_object_add_arg_type ("ETableClickToAdd::header", GTK_TYPE_OBJECT,
                 GTK_ARG_READWRITE, ARG_HEADER);
    gtk_object_add_arg_type ("ETableClickToAdd::model", GTK_TYPE_OBJECT,
                 GTK_ARG_READWRITE, ARG_MODEL);
    gtk_object_add_arg_type ("ETableClickToAdd::message", GTK_TYPE_STRING,
                 GTK_ARG_READWRITE, ARG_MESSAGE);
    gtk_object_add_arg_type ("ETableClickToAdd::width", GTK_TYPE_DOUBLE,
                 GTK_ARG_READWRITE, ARG_WIDTH);
    gtk_object_add_arg_type ("ETableClickToAdd::height", GTK_TYPE_DOUBLE,
                 GTK_ARG_READABLE, ARG_HEIGHT);

    etcta_signals [CURSOR_CHANGE] =
        gtk_signal_new ("cursor_change",
                GTK_RUN_LAST,
                E_OBJECT_CLASS_TYPE (object_class),
                GTK_SIGNAL_OFFSET (ETableClickToAddClass, cursor_change),
                gtk_marshal_NONE__INT_INT,
                GTK_TYPE_NONE, 2, GTK_TYPE_INT, GTK_TYPE_INT);

    E_OBJECT_CLASS_ADD_SIGNALS (object_class, etcta_signals, LAST_SIGNAL);
}

static void
etcta_init (GnomeCanvasItem *item)
{
    ETableClickToAdd *etcta = E_TABLE_CLICK_TO_ADD (item);

    etcta->one = NULL;
    etcta->model = NULL;
    etcta->eth = NULL;

    etcta->message = NULL;

    etcta->row = NULL;
    etcta->text = NULL;
    etcta->rect = NULL;

    etcta->selection = e_table_selection_model_new();
    gtk_signal_connect(GTK_OBJECT(etcta->selection), "cursor_changed",
               GTK_SIGNAL_FUNC(etcta_cursor_change), etcta);

    e_canvas_item_set_reflow_callback(item, etcta_reflow);
}

GtkType
e_table_click_to_add_get_type (void)
{
    static GtkType type = 0;

    if (!type){
        GtkTypeInfo info = {
            "ETableClickToAdd",
            sizeof (ETableClickToAdd),
            sizeof (ETableClickToAddClass),
            (GtkClassInitFunc) etcta_class_init,
            (GtkObjectInitFunc) etcta_init,
            NULL, /* reserved 1 */
            NULL, /* reserved 2 */
            (GtkClassInitFunc) NULL
        };

        type = gtk_type_unique (PARENT_OBJECT_TYPE, &info);
    }

    return type;
}


/* The colors in this need to be themefied. */
/**
 * e_table_click_to_add_commit:
 * @etcta: The %ETableClickToAdd to commit.
 * 
 * This routine commits the current thing being edited and returns to
 * just displaying the click to add message.
 **/
void
e_table_click_to_add_commit (ETableClickToAdd *etcta)
{
    if (etcta->row) {
        e_table_one_commit(E_TABLE_ONE(etcta->one));
        etcta_drop_one (etcta);
        gtk_object_destroy(GTK_OBJECT(etcta->row));
        etcta->row = NULL;
    }
    if (!etcta->rect) {
        etcta->rect = gnome_canvas_item_new(GNOME_CANVAS_GROUP(etcta),
                            gnome_canvas_rect_get_type(),
                            "x1", (double) 0,
                            "y1", (double) 0,
                            "x2", (double) etcta->width - 1,
                            "y2", (double) etcta->height - 1,
                            "outline_color", "black",
                            "fill_color", "white",
                            NULL);
    }
    if (!etcta->text) {
        etcta->text = gnome_canvas_item_new(GNOME_CANVAS_GROUP(etcta),
                            e_text_get_type(),
                            "text", etcta->message ? etcta->message : "",
                            "anchor", GTK_ANCHOR_NW,
                            "width", etcta->width - 4,
                            "draw_background", FALSE,
                            NULL);
        e_canvas_item_move_absolute (etcta->text, 3, 3);
    }
}