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

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Chris Lahey <clahey@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "e-table-click-to-add.h"

#include <gtk/gtk.h>
#include <glib/gi18n.h>
#include <gdk/gdkkeysyms.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <libgnomecanvas/libgnomecanvas.h>

#include "e-canvas-utils.h"
#include "e-canvas.h"
#include "e-marshal.h"
#include "e-table-defines.h"
#include "e-table-header.h"
#include "e-table-one.h"
#include "e-text.h"
#include "gal-a11y-e-table-click-to-add.h"

enum {
    CURSOR_CHANGE,
    STYLE_SET,
    LAST_SIGNAL
};

static guint etcta_signals[LAST_SIGNAL] = { 0 };

G_DEFINE_TYPE (
    ETableClickToAdd,
    e_table_click_to_add,
    GNOME_TYPE_CANVAS_GROUP)

enum {
    PROP_0,
    PROP_HEADER,
    PROP_MODEL,
    PROP_MESSAGE,
    PROP_WIDTH,
    PROP_HEIGHT,
    PROP_IS_EDITING
};

static void
etcta_cursor_change (GObject *object,
                     gint row,
                     gint col,
                     ETableClickToAdd *etcta)
{
    g_signal_emit (
        etcta,
        etcta_signals[CURSOR_CHANGE], 0,
        row, col);
}

static void
etcta_style_set (ETableClickToAdd *etcta,
                 GtkStyle *previous_style)
{
    GtkWidget *widget;
    GtkStyle *style;

    widget = GTK_WIDGET (GNOME_CANVAS_ITEM (etcta)->canvas);
    style = gtk_widget_get_style (widget);

    if (etcta->rect)
        gnome_canvas_item_set (
            etcta->rect,
            "outline_color_gdk", &style->fg[GTK_STATE_NORMAL],
            "fill_color_gdk", &style->bg[GTK_STATE_NORMAL],
            NULL);

    if (etcta->text)
        gnome_canvas_item_set (
            etcta->text,
            "fill_color_gdk", &style->text[GTK_STATE_NORMAL],
            NULL);
}

static void
etcta_add_table_header (ETableClickToAdd *etcta,
                        ETableHeader *header)
{
    etcta->eth = header;
    if (etcta->eth)
        g_object_ref (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)
{
    if (!etcta->eth)
        return;

    g_object_unref (etcta->eth);
    etcta->eth = NULL;
}

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

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

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

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

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

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

static void
etcta_dispose (GObject *object)
{
    ETableClickToAdd *etcta = E_TABLE_CLICK_TO_ADD (object);

    etcta_drop_table_header (etcta);
    etcta_drop_model (etcta);
    etcta_drop_message (etcta);
    if (etcta->selection)
        g_object_unref (etcta->selection);
    etcta->selection = NULL;

    /* Chain up to parent's dispose() method. */
    G_OBJECT_CLASS (e_table_click_to_add_parent_class)->dispose (object);
}

static void
etcta_set_property (GObject *object,
                    guint property_id,
                    const GValue *value,
                    GParamSpec *pspec)
{
    GnomeCanvasItem *item;
    ETableClickToAdd *etcta;

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

    switch (property_id) {
    case PROP_HEADER:
        etcta_drop_table_header (etcta);
        etcta_add_table_header (etcta, E_TABLE_HEADER (g_value_get_object (value)));
        break;
    case PROP_MODEL:
        etcta_drop_model (etcta);
        etcta_add_model (etcta, E_TABLE_MODEL (g_value_get_object (value)));
        break;
    case PROP_MESSAGE:
        etcta_drop_message (etcta);
        etcta_add_message (etcta, g_value_get_string (value));
        break;
    case PROP_WIDTH:
        etcta->width = g_value_get_double (value);
        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 ? 4 : etcta->width) - 4,
                NULL);
        if (etcta->rect)
            gnome_canvas_item_set (
                etcta->rect,
                "x2", etcta->width - 1,
                NULL);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
        return;

    }
    gnome_canvas_item_request_update (item);
}

static void
create_rect_and_text (ETableClickToAdd *etcta)
{
    GtkWidget *widget;
    GtkStyle *style;

    widget = GTK_WIDGET (GNOME_CANVAS_ITEM (etcta)->canvas);
    style = gtk_widget_get_style (widget);

    if (!etcta->rect)
        etcta->rect = gnome_canvas_item_new (
            GNOME_CANVAS_GROUP (etcta),
            gnome_canvas_rect_get_type (),
            "x1", (gdouble) 0,
            "y1", (gdouble) 0,
            "x2", (gdouble) etcta->width - 1,
            "y2", (gdouble) etcta->height - 1,
            "outline_color_gdk", &style->fg[GTK_STATE_NORMAL],
            "fill_color_gdk", &style->bg[GTK_STATE_NORMAL],
            NULL);

    if (!etcta->text)
        etcta->text = gnome_canvas_item_new (
            GNOME_CANVAS_GROUP (etcta),
            e_text_get_type (),
            "text", etcta->message ? etcta->message : "",
            "width", etcta->width - 4,
            "fill_color_gdk", &style->text[GTK_STATE_NORMAL],
            NULL);
}

static void
etcta_get_property (GObject *object,
                    guint property_id,
                    GValue *value,
                    GParamSpec *pspec)
{
    ETableClickToAdd *etcta;

    etcta = E_TABLE_CLICK_TO_ADD (object);

    switch (property_id) {
    case PROP_HEADER:
        g_value_set_object (value, etcta->eth);
        break;
    case PROP_MODEL:
        g_value_set_object (value, etcta->model);
        break;
    case PROP_MESSAGE:
        g_value_set_string (value, etcta->message);
        break;
    case PROP_WIDTH:
        g_value_set_double (value, etcta->width);
        break;
    case PROP_HEIGHT:
        g_value_set_double (value, etcta->height);
        break;
    case PROP_IS_EDITING:
        g_value_set_boolean (value, e_table_click_to_add_is_editing (etcta));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
        break;
    }
}

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

    create_rect_and_text (etcta);
    e_canvas_item_move_absolute (etcta->text, 2, 2);

    if (GNOME_CANVAS_ITEM_CLASS (e_table_click_to_add_parent_class)->realize)
        (*GNOME_CANVAS_ITEM_CLASS (e_table_click_to_add_parent_class)->realize)(item);

    e_canvas_item_request_reflow (item);
}

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

static void finish_editing (ETableClickToAdd *etcta);

static gint
item_key_press (ETableItem *item,
                gint row,
                gint col,
                GdkEvent *event,
                ETableClickToAdd *etcta)
{
    switch (event->key.keyval) {
        case GDK_KEY_Return:
        case GDK_KEY_KP_Enter:
        case GDK_KEY_ISO_Enter:
        case GDK_KEY_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
table_click_to_add_row_is_editing_changed_cb (ETableItem *item,
                          GParamSpec *param,
                          ETableClickToAdd *etcta)
{
    g_return_if_fail (E_IS_TABLE_CLICK_TO_ADD (etcta));

    g_object_notify (G_OBJECT (etcta), "is-editing");
}

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

        e_table_item_leave_edit (E_TABLE_ITEM (etcta->row));
        e_table_one_commit (E_TABLE_ONE (etcta->one));
        etcta_drop_one (etcta);
        g_object_run_dispose (G_OBJECT (etcta->row));
        etcta->row = NULL;

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

        g_signal_connect (
            etcta->row, "key_press",
            G_CALLBACK (item_key_press), etcta);

        g_signal_connect (
            etcta->row, "notify::is-editing",
            G_CALLBACK (table_click_to_add_row_is_editing_changed_cb), etcta);

        set_initial_selection (etcta);

        g_object_notify (G_OBJECT (etcta), "is-editing");
    }
}

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

    switch (e->type) {
    case GDK_FOCUS_CHANGE:
        if (!e->focus_change.in)
            return TRUE;

    case GDK_BUTTON_PRESS:
        if (etcta->text) {
            g_object_run_dispose (G_OBJECT (etcta->text));
            etcta->text = NULL;
        }
        if (etcta->rect) {
            g_object_run_dispose (G_OBJECT (etcta->rect));
            etcta->rect = NULL;
        }
        if (!etcta->row) {
            ETableModel *one;

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

            g_signal_connect (
                etcta->row, "key_press",
                G_CALLBACK (item_key_press), etcta);

            g_signal_connect (
                etcta->row, "notify::is-editing",
                G_CALLBACK (table_click_to_add_row_is_editing_changed_cb), etcta);

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

            set_initial_selection (etcta);

            g_object_notify (G_OBJECT (etcta), "is-editing");
        }
        break;

    case GDK_KEY_PRESS:
        switch (e->key.keyval) {
        case GDK_KEY_Tab:
        case GDK_KEY_KP_Tab:
        case GDK_KEY_ISO_Left_Tab:
            finish_editing (etcta);
            break;
        default:
            return FALSE;
        case GDK_KEY_Escape:
            if (etcta->row) {
                e_table_item_leave_edit (E_TABLE_ITEM (etcta->row));
                etcta_drop_one (etcta);
                g_object_run_dispose (G_OBJECT (etcta->row));
                etcta->row = NULL;
                create_rect_and_text (etcta);
                e_canvas_item_move_absolute (etcta->text, 3, 3);
            }
            break;
        }
        break;

    default:
        return FALSE;
    }
    return TRUE;
}

static void
etcta_reflow (GnomeCanvasItem *item,
              gint flags)
{
    ETableClickToAdd *etcta = E_TABLE_CLICK_TO_ADD (item);

    gdouble old_height = etcta->height;

    if (etcta->text) {
        g_object_get (
            etcta->text,
            "height", &etcta->height,
            NULL);
        etcta->height += 6;
    }
    if (etcta->row) {
        g_object_get (
            etcta->row,
            "height", &etcta->height,
            NULL);
    }

    if (etcta->rect) {
        g_object_set (
            etcta->rect,
            "y2", etcta->height - 1,
            NULL);
    }

    if (old_height != etcta->height)
        e_canvas_item_request_parent_reflow (item);
}

static void
e_table_click_to_add_class_init (ETableClickToAddClass *class)
{
    GnomeCanvasItemClass *item_class = GNOME_CANVAS_ITEM_CLASS (class);
    GObjectClass *object_class = G_OBJECT_CLASS (class);

    class->cursor_change = NULL;
    class->style_set     = etcta_style_set;

    object_class->dispose      = etcta_dispose;
    object_class->set_property = etcta_set_property;
    object_class->get_property = etcta_get_property;

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

    g_object_class_install_property (
        object_class,
        PROP_HEADER,
        g_param_spec_object (
            "header",
            "Header",
            NULL,
            E_TYPE_TABLE_HEADER,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_MODEL,
        g_param_spec_object (
            "model",
            "Model",
            NULL,
            E_TYPE_TABLE_MODEL,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_MESSAGE,
        g_param_spec_string (
            "message",
            "Message",
            NULL,
            NULL,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_WIDTH,
        g_param_spec_double (
            "width",
            "Width",
            NULL,
            0.0, G_MAXDOUBLE, 0.0,
            G_PARAM_READWRITE |
            G_PARAM_LAX_VALIDATION));

    g_object_class_install_property (
        object_class,
        PROP_HEIGHT,
        g_param_spec_double (
            "height",
            "Height",
            NULL,
            0.0, G_MAXDOUBLE, 0.0,
            G_PARAM_READABLE |
            G_PARAM_LAX_VALIDATION));

    g_object_class_install_property (
        object_class,
        PROP_IS_EDITING,
        g_param_spec_boolean (
            "is-editing",
            "Whether is in an editing mode",
            "Whether is in an editing mode",
            FALSE,
            G_PARAM_READABLE));

    etcta_signals[CURSOR_CHANGE] = g_signal_new (
        "cursor_change",
        G_OBJECT_CLASS_TYPE (object_class),
        G_SIGNAL_RUN_LAST,
        G_STRUCT_OFFSET (ETableClickToAddClass, cursor_change),
        NULL, NULL,
        e_marshal_VOID__INT_INT,
        G_TYPE_NONE, 2,
        G_TYPE_INT,
        G_TYPE_INT);

    etcta_signals[STYLE_SET] = g_signal_new (
        "style_set",
        G_OBJECT_CLASS_TYPE (object_class),
        G_SIGNAL_RUN_LAST,
        G_STRUCT_OFFSET (ETableClickToAddClass, style_set),
        NULL, NULL,
        g_cclosure_marshal_VOID__OBJECT,
        G_TYPE_NONE, 1,
        GTK_TYPE_STYLE);

    gal_a11y_e_table_click_to_add_init ();
}

static void
e_table_click_to_add_init (ETableClickToAdd *etcta)
{
    AtkObject *a11y;

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

    etcta->message = NULL;

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

    /* Pick some arbitrary defaults. */
    etcta->width = 12;
    etcta->height = 6;

    etcta->selection = e_table_selection_model_new ();
    g_signal_connect (
        etcta->selection, "cursor_changed",
        G_CALLBACK (etcta_cursor_change), etcta);

    e_canvas_item_set_reflow_callback (GNOME_CANVAS_ITEM (etcta), etcta_reflow);

    /* create its a11y object at this time if accessibility is enabled*/
    if (atk_get_root () != NULL) {
        a11y = atk_gobject_accessible_for_object (G_OBJECT (etcta));
        atk_object_set_name (a11y, _("click to add"));
    }
}

/* 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);
        g_object_run_dispose (G_OBJECT (etcta->row));
        etcta->row = NULL;
    }
    create_rect_and_text (etcta);
    e_canvas_item_move_absolute (etcta->text, 3, 3);
}

gboolean
e_table_click_to_add_is_editing (ETableClickToAdd *etcta)
{
    g_return_val_if_fail (E_IS_TABLE_CLICK_TO_ADD (etcta), FALSE);

    return etcta->row && e_table_item_is_editing (E_TABLE_ITEM (etcta->row));
}