path: root/notes/e-note.c

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

#include <config.h>
#include <gnome.h>
#include <gdk/gdkx.h>

#include <gal/widgets/e-canvas.h>
#include <gal/widgets/e-canvas-utils.h>
#include <gal/util/e-util.h>
#include <gal/e-text/e-text.h>

#include "e-note.h"
#include "e-bevel-button.h"
#include "e-bevel-button-util.h"

#define PARENT_TYPE GTK_TYPE_WINDOW

enum {
    E_NOTE_TEXT_CHANGED,
    E_NOTE_LAST_SIGNAL
};

static guint e_note_signals [E_NOTE_LAST_SIGNAL] = { 0 };

static GtkWindowClass *parent_class = NULL;

struct _ENotePrivate {
    GtkWidget *canvas;
    
    GnomeCanvasItem *frame;
    GnomeCanvasItem *rect;

    GnomeCanvasItem *text_item;
    
    GnomeCanvasItem *move_button;
    GnomeCanvasItem *close_button;
    GnomeCanvasItem *resize_button;
    
    /* Used for moving and resizing */
    gint press_x, press_y;
    gint resize_width, resize_height;
    gboolean in_drag;
};

static void
e_note_text_changed (ETextModel *model, gpointer data)
{
    gtk_signal_emit (GTK_OBJECT (data),
             e_note_signals [E_NOTE_TEXT_CHANGED]);
}

static gint
e_note_resize_button_changed (GtkWidget *widget, GdkEventButton *event, gpointer data)
{
    ENote *note = E_NOTE (data);

    if (event->type == GDK_BUTTON_PRESS) {
        note->priv->press_x = event->x_root;
        note->priv->press_y = event->y_root;

        gdk_window_get_geometry (GTK_WIDGET (note)->window, NULL, NULL,
                     &note->priv->resize_width, &note->priv->resize_height, NULL);
        
        gdk_pointer_grab (widget->window,
                  FALSE,
                  (GDK_BUTTON1_MOTION_MASK |
                   GDK_POINTER_MOTION_HINT_MASK |
                   GDK_BUTTON_RELEASE_MASK),
                  NULL,
                  NULL,
                  GDK_CURRENT_TIME);
        note->priv->in_drag = TRUE;
        
    }
    else {
        if (note->priv->in_drag) {
            if (event->window != widget->window)
                return FALSE;
            
            gdk_pointer_ungrab (GDK_CURRENT_TIME);
            note->priv->in_drag = FALSE;
        }
    }

    return TRUE;
}

static gint
e_note_resize_motion_event (GtkWidget *widget, GdkEventMotion *event, gpointer data)
{
    GtkWidget *window = GTK_WIDGET (data);
    ENote *note = E_NOTE (data);
    gint new_x, new_y;
    gint width, height;

    if (note->priv->in_drag) {
        gdk_window_get_pointer (GDK_ROOT_PARENT (), &new_x, &new_y, NULL);

        width = note->priv->resize_width + new_x - note->priv->press_x;
        if (width < 60)
            width = 60;
        
        height = note->priv->resize_height + new_y - note->priv->press_y;
        if (height < 60)
            height = 60;

        gdk_window_resize (window->window, width, height);

        return TRUE;
    }

    return FALSE;
}

static gint
e_note_move_button_changed (GtkWidget *widget, GdkEventButton *event, gpointer data)
{
    ENote *note = E_NOTE (data);
    
    if (event->button != 1)
        return FALSE;

    if (event->type == GDK_BUTTON_PRESS) {
        gint root_x, root_y;

        gdk_window_get_origin (widget->window, &root_x, &root_y);
        note->priv->press_x = root_x - event->x_root;
        note->priv->press_y = root_y - event->y_root;
        
        gdk_pointer_grab (widget->window,
                  FALSE,
                  (GDK_BUTTON1_MOTION_MASK |
                   GDK_POINTER_MOTION_HINT_MASK |
                   GDK_BUTTON_RELEASE_MASK),
                  NULL,
                  NULL,
                  GDK_CURRENT_TIME);

        note->priv->in_drag = TRUE;
    }
    else {
        if (note->priv->in_drag) {
            if (event->window != widget->window)
                return FALSE;

            gdk_pointer_ungrab (GDK_CURRENT_TIME);
            note->priv->in_drag = FALSE;
        }
    }
    
    return TRUE;
}

static gint
e_note_move_motion_event (GtkWidget *widget, GdkEventMotion *event, gpointer data)
{
    gint new_x, new_y;
    ENote *note = E_NOTE (data);
    GtkWidget *window = GTK_WIDGET (data);

    if (note->priv->in_drag) {
        gdk_window_get_pointer (GDK_ROOT_PARENT (), &new_x, &new_y, NULL);

        new_x += note->priv->press_x;
        new_y += note->priv->press_y;

        gdk_window_move (window->window, new_x, new_y);
    }

    return TRUE;
}

static void
e_note_canvas_size_allocate (GtkWidget *widget, GtkAllocation *allocation, gpointer data)
{
    ENote *note;
    gdouble height;
    
    note = E_NOTE (data);

    gnome_canvas_item_set (note->priv->text_item,
                   "width", (gdouble) allocation->width - 10,
                   NULL);
    gtk_object_get (GTK_OBJECT (note->priv->text_item),
            "height", &height,
            NULL);
    height = MAX (height, allocation->height);
    gnome_canvas_set_scroll_region (GNOME_CANVAS (note->priv->canvas), 0, 0,
                    allocation->width, height);
    gnome_canvas_item_set (note->priv->frame,
                   "x2", (gdouble) allocation->width - 1,
                   "y2", (gdouble) allocation->height - 1,
                   NULL);
    gnome_canvas_item_set (note->priv->rect,
                   "x2", (gdouble) allocation->width - 1,
                   "y2", (gdouble) allocation->height - 1,
                   NULL);
    gnome_canvas_item_set (note->priv->move_button,
                   "width", (gdouble) allocation->width - 29,
                   NULL);
    gnome_canvas_item_set (note->priv->resize_button,
                   "x", (gdouble) allocation->width - 23,
                   "y", (gdouble) allocation->height - 23,
                   NULL);
    gnome_canvas_item_set (note->priv->close_button,
                   "x", (gdouble) allocation->width - 23,
                   NULL);
}

static void
e_note_realize (GtkWidget *widget)
{
    GTK_WIDGET_CLASS (parent_class)->realize (widget);

    gdk_window_set_decorations (widget->window, 0);
}

static void
e_note_class_init (ENoteClass *klass)
{
    GtkWidgetClass *widget_class;
    GtkObjectClass *object_class;
    
    object_class = (GtkObjectClass *)klass;
    widget_class = (GtkWidgetClass *)klass;
    parent_class = gtk_type_class (PARENT_TYPE);
    
    widget_class->realize = e_note_realize;

    e_note_signals [E_NOTE_TEXT_CHANGED] =
        gtk_signal_new ("changed",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ENoteClass, text_changed),
                gtk_marshal_NONE__NONE,
                GTK_TYPE_NONE, 0);

    gtk_object_class_add_signals (object_class, e_note_signals, E_NOTE_LAST_SIGNAL);
}

static void
e_note_init (ENote *note)
{
    ENotePrivate *priv;
    GtkWidget *button;

    priv = g_new (ENotePrivate, 1);

    note->priv = priv;

    gtk_widget_push_visual (gdk_rgb_get_visual ());
    gtk_widget_push_colormap (gdk_rgb_get_cmap ());
    
    priv->canvas = e_canvas_new ();

    gtk_widget_pop_visual ();
    gtk_widget_pop_colormap ();
    
    gtk_signal_connect (GTK_OBJECT (priv->canvas), "size_allocate",
                GTK_SIGNAL_FUNC (e_note_canvas_size_allocate), note);
    gtk_widget_show (priv->canvas);
    gtk_container_add (GTK_CONTAINER (note), priv->canvas);

    priv->rect = gnome_canvas_item_new (gnome_canvas_root (GNOME_CANVAS (priv->canvas)),
                        gnome_canvas_rect_get_type (),
                        "x1", 0.0,
                        "y1", 0.0,
                        "x2", 100.0,
                        "y2", 100.0,
                        "fill_color_rgba", 0xf5ffa0ff,
                        NULL);
    priv->frame = gnome_canvas_item_new (gnome_canvas_root (GNOME_CANVAS (priv->canvas)),
                         gnome_canvas_rect_get_type (),
                         "x1", 0.0,
                         "y1", 0.0,
                         "x2", 100.0,
                         "y2", 100.0,
                         "outline_color", "black",
                         NULL);

    priv->text_item = gnome_canvas_item_new (gnome_canvas_root (GNOME_CANVAS (priv->canvas)),
                         e_text_get_type (),
                         "text", "",
                         "font_gdk", priv->canvas->style->font,
                         "fill_color", "black",
                         "anchor", GTK_ANCHOR_NW,
                         "clip", TRUE,
                         "editable", TRUE,
                         "line_wrap", TRUE,
                         "width", 150.0,
                         NULL);
    e_canvas_item_move_absolute(priv->text_item,
                    5.0, 25.0);

    gtk_signal_connect (GTK_OBJECT (E_TEXT (priv->text_item)->model), "changed",
                GTK_SIGNAL_FUNC (e_note_text_changed), note);
                    
    button = e_bevel_button_new ();
    gtk_signal_connect (GTK_OBJECT (button), "button_press_event",
                GTK_SIGNAL_FUNC (e_note_move_button_changed), note);
    gtk_signal_connect (GTK_OBJECT (button), "button_release_event",
                GTK_SIGNAL_FUNC (e_note_move_button_changed), note);
    gtk_signal_connect (GTK_OBJECT (button), "motion_notify_event",
                GTK_SIGNAL_FUNC (e_note_move_motion_event), note);
    gtk_widget_show (button);
    priv->move_button = gnome_canvas_item_new (gnome_canvas_root (GNOME_CANVAS (priv->canvas)), 
                           gnome_canvas_widget_get_type (), 
                           "widget", button, 
                           "x", 3.0, 
                           "y", 3.0, 
                           "width", 20.0, 
                           "height", 20.0, 
                           NULL); 
    button = e_bevel_button_new ();
    gtk_widget_show (button);
    priv->close_button = gnome_canvas_item_new (gnome_canvas_root (GNOME_CANVAS (priv->canvas)),
                            gnome_canvas_widget_get_type (),
                            "widget", button,
                            "x", 3.0,
                            "y", 3.0,
                            "width", 20.0,
                            "height", 20.0,
                            NULL);

    button = e_bevel_button_new ();
    gtk_signal_connect (GTK_OBJECT (button), "button_press_event",
                GTK_SIGNAL_FUNC (e_note_resize_button_changed), note);
    gtk_signal_connect (GTK_OBJECT (button), "button_release_event",
                GTK_SIGNAL_FUNC (e_note_resize_button_changed), note);
    gtk_signal_connect (GTK_OBJECT (button), "motion_notify_event",
                GTK_SIGNAL_FUNC (e_note_resize_motion_event), note);    
    gtk_widget_show (button);
    priv->resize_button = gnome_canvas_item_new (gnome_canvas_root (GNOME_CANVAS (priv->canvas)),
                             gnome_canvas_widget_get_type (),
                             "widget", button,
                             "x", 3.0,
                             "y", 3.0,
                             "width", 20.0,
                             "height", 20.0,
                             NULL);
}

void
e_note_set_text (ENote *note, gchar *text)
{
    g_return_if_fail (note != NULL);
    g_return_if_fail (E_IS_NOTE (note));
    g_return_if_fail (text != NULL);

    gnome_canvas_item_set (note->priv->text_item,
                   "text", text,
                   NULL);
}

gchar *
e_note_get_text (ENote *note)
{
    gchar *text;
    
    g_return_val_if_fail (note != NULL, NULL);
    g_return_val_if_fail (E_IS_NOTE (note), NULL);
    g_return_val_if_fail (text != NULL, NULL);

    gtk_object_get (GTK_OBJECT (note->priv->text_item),
            "text", &text,
            NULL);

    return text;
}


GtkWidget *
e_note_new (void)
{
    ENote *note;

    note = gtk_type_new (E_TYPE_NOTE);

    return GTK_WIDGET (note);
}

E_MAKE_TYPE (e_note, "ENote", ENote, e_note_class_init, e_note_init, PARENT_TYPE);