erGtkDialogJumpToPage.c

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/**
 * \file erGtkDialogJumpToPage.c
 * \brief ereader gtk library - GtkDialog used to jump to a specific page
 */
 
/*
 * This file is part of libergtk.
 *
 * libergtk 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.
 *
 * libergtk 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, see <http://www.gnu.org/licenses/>.
 */

/**
 * Copyright (C) 2008 iRex Technologies B.V.
 * All rights reserved.
 */

#include <stdlib.h>
#include <gtk/gtk.h>

#include "eri18n.h"
#include "ergtk_log.h"
#include "erGtkDialogJumpToPage.h"

#define UNUSED(x) (void)(x)


G_DEFINE_TYPE (erGtkJumpToPageDialog, ergtk_jump_to_page_dialog, GTK_TYPE_DIALOG)

static void ergtk_jump_to_page_dialog_class_init (erGtkJumpToPageDialogClass *klass)
{
    UNUSED(klass);
}

static void on_number_clicked(GtkWidget *widget, gpointer data)
{
    gchar buf[3];
    gint len, pos;
    gint i = 0;

    g_return_if_fail(ERGTK_IS_JUMP_TO_PAGE_DIALOG(data));
    erGtkJumpToPageDialog* dialog = ERGTK_JUMP_TO_PAGE_DIALOG(data);

    for (i = 0; i < TOTAL_NUMERIC_BUTTONS; i++)
    {
        if (dialog->numeric_btns[i] == widget)
        {
            break;
        }
    }

    g_assert(i != TOTAL_NUMERIC_BUTTONS);

    len = g_snprintf(buf, sizeof(buf), "%d", i);
    pos = gtk_editable_get_position(GTK_EDITABLE(dialog->entry));
    gtk_editable_insert_text(GTK_EDITABLE(dialog->entry), buf, len, &pos);
    gtk_editable_set_position(GTK_EDITABLE(dialog->entry), pos);
}

static void on_backspace_clicked(GtkWidget *widget, gpointer data)
{
    UNUSED(widget);
    
    g_return_if_fail(ERGTK_IS_JUMP_TO_PAGE_DIALOG(data));
    erGtkJumpToPageDialog* dialog = ERGTK_JUMP_TO_PAGE_DIALOG(data);

    gint pos = gtk_editable_get_position(GTK_EDITABLE(dialog->entry));
    gtk_editable_delete_text(GTK_EDITABLE(dialog->entry), pos - 1, pos);
}

static void on_enter_clicked(GtkWidget *widget, gpointer data)
{
    UNUSED(widget);
    LOGPRINTF("entry");
    
    g_return_if_fail(ERGTK_IS_JUMP_TO_PAGE_DIALOG(data));
    erGtkJumpToPageDialog* dialog = ERGTK_JUMP_TO_PAGE_DIALOG(data);

    gint page = atoi(gtk_entry_get_text(GTK_ENTRY(dialog->entry)));
    if (page > 0)
    {
        /* Return the page number in the entry field */
        gtk_dialog_response(GTK_DIALOG(dialog), page);
    }
    else
    {
        /* Return CANCEL if no page in entry field */
        gtk_dialog_response(GTK_DIALOG(dialog), GTK_RESPONSE_CANCEL);
    }
}

static void on_focus_out(GtkWidget *widget, gpointer data)
{
    UNUSED(data);
    LOGPRINTF("entry");

    /* Return CANCEL when dialog looses focus */
    gtk_dialog_response(GTK_DIALOG(widget), GTK_RESPONSE_CANCEL);
}

// init instance
static void ergtk_jump_to_page_dialog_init (erGtkJumpToPageDialog *dialog)
{
    GtkWidget *button;
    GtkWidget *table;
    GtkWidget *vbox;
    gint i, row, col;
    gchar buf[4];

    LOGPRINTF("entry");

    g_return_if_fail(ERGTK_IS_JUMP_TO_PAGE_DIALOG(dialog));

    /* Create a new dialog */
    gtk_dialog_set_has_separator(GTK_DIALOG(dialog), FALSE);
    gtk_window_set_destroy_with_parent(GTK_WINDOW(dialog), TRUE);
    gtk_widget_hide (GTK_DIALOG(dialog)->action_area);

    /* Set the window title */
    gtk_window_set_title (GTK_WINDOW (dialog), "");

    /* Set the window properties */
    gtk_window_set_resizable(GTK_WINDOW(dialog), FALSE);
    gtk_window_set_modal(GTK_WINDOW(dialog), TRUE);

    /* Sets the border width of the window. */
    //gtk_container_set_border_width (GTK_CONTAINER (dialog), 5);

    /* Create a 4x3 table */
    table = gtk_table_new (4, 3, TRUE);
    gtk_table_set_row_spacings(GTK_TABLE(table), 2);
    gtk_table_set_col_spacings(GTK_TABLE(table), 2);

    /* Put the table in the main window */
    vbox = gtk_vbox_new(FALSE, 0);
    gtk_container_add(GTK_CONTAINER(GTK_DIALOG(dialog)->vbox), vbox);
    gtk_box_pack_start(GTK_BOX(vbox), table, FALSE, FALSE, 0);
    
    row = 0;
    
    /* Create and add the entry field into the table */
    dialog->entry = gtk_entry_new_with_max_length(6);
    g_object_set(G_OBJECT(dialog->entry), "im-context-inhibit", TRUE, NULL); // disable input method
    g_object_set(G_OBJECT(dialog->entry), "activates-default", TRUE, NULL );
    gtk_widget_set_size_request(dialog->entry, 50, -1);
    gtk_table_attach_defaults (GTK_TABLE (table), dialog->entry, 0, 1, row, row + 1);
    gtk_widget_show(dialog->entry);

    /* Create and add the 'Go to page' button */
    button = gtk_button_new_with_label(_("Go to Page"));
    g_signal_connect(G_OBJECT(button), "clicked", G_CALLBACK (on_enter_clicked), (gpointer) dialog);
    gtk_table_attach_defaults (GTK_TABLE (table), button, 1, 3, row, row + 1);
    gtk_widget_show(button);

    /* Make the 'Go to page' button the default action */
    GTK_WIDGET_SET_FLAGS(button, GTK_CAN_DEFAULT);
    gtk_window_set_default(GTK_WINDOW(dialog), button);

    /* Loop through all numbers */
    for (i = 0; i <= 9; i++)
    {
        g_snprintf(buf, sizeof(buf), " %d ", i);
        button = gtk_button_new_with_label(buf);
        g_signal_connect(G_OBJECT(button), "clicked", G_CALLBACK (on_number_clicked), (gpointer) dialog);

        if (i == 0)
        {
            /* Number 0 is in the last row, first column */
            row = 4;
            col = 0;
        }
        else
        {
            /* Determine row and column for numbers 1 through 9 */
            row = (i - 1) / 3;
            col = (i - 1) % 3;
            /* Offset one row: the input field and Goto button are above */
            row += 1;
        }

        /* Insert numbered button into the table */
        gtk_table_attach_defaults (GTK_TABLE (table), button, col, col + 1, row, row + 1);
        gtk_widget_show (button);
        dialog->numeric_btns[i] = button;
    }
    
    row = 4;

    /* Add a backspace button to remove a char */
    button = gtk_button_new_with_label(_("Backspace"));
    g_signal_connect(G_OBJECT(button), "clicked", G_CALLBACK (on_backspace_clicked), (gpointer) dialog);
    gtk_table_attach_defaults (GTK_TABLE (table), button, 1, 3, row, row + 1);
    gtk_widget_show (button);

    gtk_widget_show (table);
    gtk_widget_show (vbox);
    
    g_signal_connect(G_OBJECT(dialog), "focus-out-event", G_CALLBACK (on_focus_out), NULL);
}

GtkWidget* ergtk_jump_to_page_dialog_new ()
{
    erGtkJumpToPageDialog* dialog;

    LOGPRINTF("entry");

    dialog = g_object_new (ERGTK_TYPE_JUMP_TO_PAGE_DIALOG, NULL);

    return GTK_WIDGET (dialog);
}