Add user-accounts dialog

Copied from the accounts-dialog git module.

panels/user-accounts/um-crop-area.c

@@ -0,0 +1,817 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright 2009  Red Hat, 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 3 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.
+ *
+ * Written by: Matthias Clasen <mclasen@redhat.com>
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+
+#include "um-crop-area.h"
+
+struct _UmCropAreaPrivate {
+        GdkPixbuf *browse_pixbuf;
+        GdkPixbuf *pixbuf;
+        GdkPixbuf *color_shifted;
+        gdouble scale;
+        GdkRectangle image;
+        GdkCursorType current_cursor;
+        GdkRectangle crop;
+        gint active_region;
+        gint last_press_x;
+        gint last_press_y;
+        gint base_width;
+        gint base_height;
+        gdouble aspect;
+};
+
+G_DEFINE_TYPE (UmCropArea, um_crop_area, GTK_TYPE_DRAWING_AREA);
+
+static inline guchar
+shift_color_byte (guchar b,
+                  int    shift)
+{
+        return CLAMP(b + shift, 0, 255);
+}
+
+static void
+shift_colors (GdkPixbuf *pixbuf,
+              gint       red,
+              gint       green,
+              gint       blue,
+              gint       alpha)
+{
+        gint x, y, offset, y_offset, rowstride, width, height;
+        guchar *pixels;
+        gint channels;
+
+        width = gdk_pixbuf_get_width (pixbuf);
+        height = gdk_pixbuf_get_height (pixbuf);
+        rowstride = gdk_pixbuf_get_rowstride (pixbuf);
+        pixels = gdk_pixbuf_get_pixels (pixbuf);
+        channels = gdk_pixbuf_get_n_channels (pixbuf);
+
+        for (y = 0; y < height; y++) {
+                y_offset = y * rowstride;
+                for (x = 0; x < width; x++) {
+                        offset = y_offset + x * channels;
+                        if (red != 0)
+                                pixels[offset] = shift_color_byte (pixels[offset], red);
+                        if (green != 0)
+                                pixels[offset + 1] = shift_color_byte (pixels[offset + 1], green);
+                        if (blue != 0)
+                                pixels[offset + 2] = shift_color_byte (pixels[offset + 2], blue);
+                        if (alpha != 0 && channels >= 4)
+                                pixels[offset + 3] = shift_color_byte (pixels[offset + 3], blue);
+                }
+        }
+}
+
+static void
+update_pixbufs (UmCropArea *area)
+{
+        gint width;
+        gint height;
+        GtkAllocation allocation;
+        gdouble scale;
+        GdkColor *color;
+        guint32 pixel;
+        gint dest_x, dest_y, dest_width, dest_height;
+        GtkWidget *widget;
+        GtkStyle *style;
+
+        widget = GTK_WIDGET (area);
+        gtk_widget_get_allocation (widget, &allocation);
+        style = gtk_widget_get_style (widget);
+
+        if (area->priv->pixbuf == NULL ||
+            gdk_pixbuf_get_width (area->priv->pixbuf) != allocation.width ||
+            gdk_pixbuf_get_height (area->priv->pixbuf) != allocation.height) {
+                if (area->priv->pixbuf != NULL)
+                        g_object_unref (area->priv->pixbuf);
+                area->priv->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
+                                                     gdk_pixbuf_get_has_alpha (area->priv->browse_pixbuf),
+                                                     8,
+                                                     allocation.width, allocation.height);
+
+                color = &style->bg[gtk_widget_get_state (widget)];
+                pixel = ((color->red & 0xff00) << 16) |
+                        ((color->green & 0xff00) << 8) |
+                         (color->blue & 0xff00);
+                gdk_pixbuf_fill (area->priv->pixbuf, pixel);
+
+                width = gdk_pixbuf_get_width (area->priv->browse_pixbuf);
+                height = gdk_pixbuf_get_height (area->priv->browse_pixbuf);
+
+                scale = allocation.height / (gdouble)height;
+                if (scale * width > allocation.width)
+                    scale = allocation.width / (gdouble)width;
+
+                dest_width = width * scale;
+                dest_height = height * scale;
+                dest_x = (allocation.width - dest_width) / 2;
+                dest_y = (allocation.height - dest_height) / 2,
+
+                gdk_pixbuf_scale (area->priv->browse_pixbuf,
+                                  area->priv->pixbuf,
+                                  dest_x, dest_y,
+                                  dest_width, dest_height,
+                                  dest_x, dest_y,
+                                  scale, scale,
+                                  GDK_INTERP_BILINEAR);
+
+                if (area->priv->color_shifted)
+                        g_object_unref (area->priv->color_shifted);
+                area->priv->color_shifted = gdk_pixbuf_copy (area->priv->pixbuf);
+                shift_colors (area->priv->color_shifted, -32, -32, -32, 0);
+
+                if (area->priv->scale == 0.0) {
+                        area->priv->crop.width = 2 * area->priv->base_width / scale;
+                        area->priv->crop.height = 2 * area->priv->base_height / scale;
+                        area->priv->crop.x = (gdk_pixbuf_get_width (area->priv->browse_pixbuf) - area->priv->crop.width) / 2;
+                        area->priv->crop.y = (gdk_pixbuf_get_height (area->priv->browse_pixbuf) - area->priv->crop.height) / 2;
+                }
+
+                area->priv->scale = scale;
+                area->priv->image.x = dest_x;
+                area->priv->image.y = dest_y;
+                area->priv->image.width = dest_width;
+                area->priv->image.height = dest_height;
+        }
+}
+
+static void
+crop_to_widget (UmCropArea    *area,
+                GdkRectangle  *crop)
+{
+        crop->x = area->priv->image.x + area->priv->crop.x * area->priv->scale;
+        crop->y = area->priv->image.y + area->priv->crop.y * area->priv->scale;
+        crop->width = area->priv->crop.width * area->priv->scale;
+        crop->height = area->priv->crop.height * area->priv->scale;
+}
+
+typedef enum {
+        OUTSIDE,
+        INSIDE,
+        TOP,
+        TOP_LEFT,
+        TOP_RIGHT,
+        BOTTOM,
+        BOTTOM_LEFT,
+        BOTTOM_RIGHT,
+        LEFT,
+        RIGHT
+} Location;
+
+static gboolean
+um_crop_area_draw (GtkWidget *widget,
+                   cairo_t   *cr)
+{
+        GdkRectangle area;
+        GdkRectangle crop;
+        gint width, height;
+        UmCropArea *uarea = UM_CROP_AREA (widget);
+
+        if (uarea->priv->browse_pixbuf == NULL)
+                return FALSE;
+
+        update_pixbufs (uarea);
+
+        width = gdk_pixbuf_get_width (uarea->priv->pixbuf);
+        height = gdk_pixbuf_get_height (uarea->priv->pixbuf);
+        crop_to_widget (uarea, &crop);
+
+        gdk_cairo_set_source_pixbuf (cr, uarea->priv->color_shifted, 0, 0);
+        cairo_rectangle (cr, 0, 0, width, crop.y);
+        cairo_rectangle (cr, 0, crop.y, crop.x, crop.height);
+        cairo_rectangle (cr, crop.x + crop.width, crop.y, width - crop.x - crop.width, crop.height);
+        cairo_rectangle (cr, 0, crop.y + crop.height, width, height - crop.y - crop.height);
+        cairo_fill (cr);
+
+        gdk_cairo_set_source_pixbuf (cr, uarea->priv->pixbuf, 0, 0);
+        cairo_rectangle (cr, crop.x, crop.y, crop.width, crop.height);
+        cairo_fill (cr);
+
+        if (uarea->priv->active_region != OUTSIDE) {
+                gint x1, x2, y1, y2;
+                cairo_set_source_rgb (cr, 1, 1, 1);
+                cairo_set_line_width (cr, 1.0);
+                x1 = crop.x + crop.width / 3.0;
+                x2 = crop.x + 2 * crop.width / 3.0;
+                y1 = crop.y + crop.height / 3.0;
+                y2 = crop.y + 2 * crop.height / 3.0;
+
+                cairo_move_to (cr, x1 + 0.5, crop.y);
+                cairo_line_to (cr, x1 + 0.5, crop.y + crop.height);
+
+                cairo_move_to (cr, x2 + 0.5, crop.y);
+                cairo_line_to (cr, x2 + 0.5, crop.y + crop.height);
+
+                cairo_move_to (cr, crop.x, y1 + 0.5);
+                cairo_line_to (cr, crop.x + crop.width, y1 + 0.5);
+
+                cairo_move_to (cr, crop.x, y2 + 0.5);
+                cairo_line_to (cr, crop.x + crop.width, y2 + 0.5);
+                cairo_stroke (cr);
+        }
+
+        cairo_set_source_rgb (cr,  0, 0, 0);
+        cairo_set_line_width (cr, 1.0);
+        cairo_rectangle (cr,
+                         crop.x + 0.5,
+                         crop.y + 0.5,
+                         crop.width - 1.0,
+                         crop.height - 1.0);
+        cairo_stroke (cr);
+
+        cairo_set_source_rgb (cr, 1, 1, 1);
+        cairo_set_line_width (cr, 2.0);
+        cairo_rectangle (cr,
+                         crop.x + 2.0,
+                         crop.y + 2.0,
+                         crop.width - 4.0,
+                         crop.height - 4.0);
+        cairo_stroke (cr);
+
+        return FALSE;
+}
+
+typedef enum {
+        BELOW,
+        LOWER,
+        BETWEEN,
+        UPPER,
+        ABOVE
+} Range;
+
+static Range
+find_range (gint x,
+            gint min,
+            gint max)
+{
+        gint tolerance = 12;
+
+        if (x < min - tolerance)
+                return BELOW;
+        if (x <= min + tolerance)
+                return LOWER;
+        if (x < max - tolerance)
+                return BETWEEN;
+        if (x <= max + tolerance)
+                return UPPER;
+        return ABOVE;
+}
+
+static Location
+find_location (GdkRectangle *rect,
+               gint          x,
+               gint          y)
+{
+        Range x_range, y_range;
+        Location location[5][5] = {
+                { OUTSIDE, OUTSIDE,     OUTSIDE, OUTSIDE,      OUTSIDE },
+                { OUTSIDE, TOP_LEFT,    TOP,     TOP_RIGHT,    OUTSIDE },
+                { OUTSIDE, LEFT,        INSIDE,  RIGHT,        OUTSIDE },
+                { OUTSIDE, BOTTOM_LEFT, BOTTOM,  BOTTOM_RIGHT, OUTSIDE },
+                { OUTSIDE, OUTSIDE,     OUTSIDE, OUTSIDE,      OUTSIDE }
+        };
+
+        x_range = find_range (x, rect->x, rect->x + rect->width);
+        y_range = find_range (y, rect->y, rect->y + rect->height);
+
+        return location[y_range][x_range];
+}
+
+static void
+update_cursor (UmCropArea *area,
+               gint           x,
+               gint           y)
+{
+        gint cursor_type;
+        GdkRectangle crop;
+        gint region;
+
+        region = area->priv->active_region;
+        if (region == OUTSIDE) {
+                crop_to_widget (area, &crop);
+                region = find_location (&crop, x, y);
+        }
+
+        switch (region) {
+        case OUTSIDE:
+                cursor_type = GDK_LEFT_PTR;
+                break;
+        case TOP_LEFT:
+                cursor_type = GDK_TOP_LEFT_CORNER;
+                break;
+        case TOP:
+                cursor_type = GDK_TOP_SIDE;
+                break;
+        case TOP_RIGHT:
+                cursor_type = GDK_TOP_RIGHT_CORNER;
+                break;
+        case LEFT:
+                cursor_type = GDK_LEFT_SIDE;
+                break;
+        case INSIDE:
+                cursor_type = GDK_FLEUR;
+                break;
+        case RIGHT:
+                cursor_type = GDK_RIGHT_SIDE;
+                break;
+        case BOTTOM_LEFT:
+                cursor_type = GDK_BOTTOM_LEFT_CORNER;
+                break;
+        case BOTTOM:
+                cursor_type = GDK_BOTTOM_SIDE;
+                break;
+        case BOTTOM_RIGHT:
+                cursor_type = GDK_BOTTOM_RIGHT_CORNER;
+                break;
+        }
+
+        if (cursor_type != area->priv->current_cursor) {
+                GdkCursor *cursor = gdk_cursor_new (cursor_type);
+                gdk_window_set_cursor (gtk_widget_get_window (GTK_WIDGET (area)), cursor);
+                gdk_cursor_unref (cursor);
+                area->priv->current_cursor = cursor_type;
+        }
+}
+
+static int
+eval_radial_line (gdouble center_x, gdouble center_y,
+                  gdouble bounds_x, gdouble bounds_y,
+                  gdouble user_x)
+{
+        gdouble decision_slope;
+        gdouble decision_intercept;
+
+        decision_slope = (bounds_y - center_y) / (bounds_x - center_x);
+        decision_intercept = bounds_y = -(decision_slope * bounds_x);
+
+        return (int) (decision_slope * user_x + decision_intercept);
+}
+
+static gboolean
+um_crop_area_motion_notify_event (GtkWidget      *widget,
+                                  GdkEventMotion *event)
+{
+        UmCropArea *area = UM_CROP_AREA (widget);
+        gint x, y;
+        gint delta_x, delta_y;
+        gint width, height;
+        gint adj_width, adj_height;
+        gint pb_width, pb_height;
+        GdkRectangle damage;
+        gint left, right, top, bottom;
+        gdouble new_width, new_height;
+        gdouble center_x, center_y;
+        gint min_width, min_height;
+
+        if (area->priv->browse_pixbuf == NULL)
+                return FALSE;
+
+        update_cursor (area, event->x, event->y);
+
+        crop_to_widget (area, &damage);
+        gtk_widget_queue_draw_area (widget,
+                                    damage.x - 1, damage.y - 1,
+                                    damage.width + 2, damage.height + 2);
+
+        pb_width = gdk_pixbuf_get_width (area->priv->browse_pixbuf);
+        pb_height = gdk_pixbuf_get_height (area->priv->browse_pixbuf);
+
+        x = (event->x - area->priv->image.x) / area->priv->scale;
+        y = (event->y - area->priv->image.y) / area->priv->scale;
+
+        delta_x = x - area->priv->last_press_x;
+        delta_y = y - area->priv->last_press_y;
+        area->priv->last_press_x = x;
+        area->priv->last_press_y = y;
+
+        left = area->priv->crop.x;
+        right = area->priv->crop.x + area->priv->crop.width - 1;
+        top = area->priv->crop.y;
+        bottom = area->priv->crop.y + area->priv->crop.height - 1;
+
+        center_x = (left + right) / 2.0;
+        center_y = (top + bottom) / 2.0;
+
+        switch (area->priv->active_region) {
+        case INSIDE:
+                width = right - left + 1;
+                height = bottom - top + 1;
+
+                left += delta_x;
+                right += delta_x;
+                top += delta_y;
+                bottom += delta_y;
+
+                if (left < 0)
+                        left = 0;
+                if (top < 0)
+                        top = 0;
+                if (right > pb_width)
+                        right = pb_width;
+                if (bottom > pb_height)
+                        bottom = pb_height;
+
+                adj_width = right - left + 1;
+                adj_height = bottom - top + 1;
+                if (adj_width != width) {
+                        if (delta_x < 0)
+                                right = left + width - 1;
+                        else
+                                left = right - width + 1;
+                }
+                if (adj_height != height) {
+                        if (delta_y < 0)
+                                bottom = top + height - 1;
+                        else
+                                top = bottom - height + 1;
+                }
+
+                break;
+
+        case TOP_LEFT:
+                if (area->priv->aspect < 0) {
+                        top = y;
+                        left = x;
+                }
+                else if (y < eval_radial_line (center_x, center_y, left, top, x)) {
+                        top = y;
+                        new_width = (bottom - top) * area->priv->aspect;
+                        left = right - new_width;
+                }
+                else {
+                        left = x;
+                        new_height = (right - left) / area->priv->aspect;
+                        top = bottom - new_height;
+                }
+                break;
+
+        case TOP:
+                top = y;
+                if (area->priv->aspect > 0) {
+                        new_width = (bottom - top) * area->priv->aspect;
+                        right = left + new_width;
+                }
+                break;
+
+        case TOP_RIGHT:
+                if (area->priv->aspect < 0) {
+                        top = y;
+                        right = x;
+                }
+                else if (y < eval_radial_line (center_x, center_y, right, top, x)) {
+                        top = y;
+                        new_width = (bottom - top) * area->priv->aspect;
+                        right = left + new_width;
+                }
+                else {
+                        right = x;
+                        new_height = (right - left) / area->priv->aspect;
+                        top = bottom - new_height;
+                }
+                break;
+
+        case LEFT:
+                left = x;
+                if (area->priv->aspect > 0) {
+                        new_height = (right - left) / area->priv->aspect;
+                        bottom = top + new_height;
+                }
+                break;
+
+        case BOTTOM_LEFT:
+                if (area->priv->aspect < 0) {
+                        bottom = y;
+                        left = x;
+                }
+                else if (y < eval_radial_line (center_x, center_y, left, bottom, x)) {
+                        left = x;
+                        new_height = (right - left) / area->priv->aspect;
+                        bottom = top + new_height;
+                }
+                else {
+                        bottom = y;
+                        new_width = (bottom - top) * area->priv->aspect;
+                        left = right - new_width;
+                }
+                break;
+
+        case RIGHT:
+                right = x;
+                if (area->priv->aspect > 0) {
+                        new_height = (right - left) / area->priv->aspect;
+                        bottom = top + new_height;
+                }
+                break;
+
+        case BOTTOM_RIGHT:
+                if (area->priv->aspect < 0) {
+                        bottom = y;
+                        right = x;
+                }
+                else if (y < eval_radial_line (center_x, center_y, right, bottom, x)) {
+                        right = x;
+                        new_height = (right - left) / area->priv->aspect;
+                        bottom = top + new_height;
+                }
+                else {
+                        bottom = y;
+                        new_width = (bottom - top) * area->priv->aspect;
+                        right = left + new_width;
+                }
+                break;
+
+        case BOTTOM:
+                bottom = y;
+                if (area->priv->aspect > 0) {
+                        new_width = (bottom - top) * area->priv->aspect;
+                        right= left + new_width;
+                }
+                break;
+
+        default:
+                return FALSE;
+        }
+
+        min_width = area->priv->base_width / area->priv->scale;
+        min_height = area->priv->base_height / area->priv->scale;
+
+        width = right - left + 1;
+        height = bottom - top + 1;
+        if (area->priv->aspect < 0) {
+                if (left < 0)
+                        left = 0;
+                if (top < 0)
+                        top = 0;
+                if (right > pb_width)
+                        right = pb_width;
+                if (bottom > pb_height)
+                        bottom = pb_height;
+
+                width = right - left + 1;
+                height = bottom - top + 1;
+
+                switch (area->priv->active_region) {
+                case LEFT:
+                case TOP_LEFT:
+                case BOTTOM_LEFT:
+                        if (width < min_width)
+                                left = right - min_width;
+                        break;
+                case RIGHT:
+                case TOP_RIGHT:
+                case BOTTOM_RIGHT:
+                        if (width < min_width)
+                                right = left + min_width;
+                        break;
+
+                default: ;
+                }
+
+                switch (area->priv->active_region) {
+                case TOP:
+                case TOP_LEFT:
+                case TOP_RIGHT:
+                        if (height < min_height)
+                                top = bottom - min_height;
+                        break;
+                case BOTTOM:
+                case BOTTOM_LEFT:
+                case BOTTOM_RIGHT:
+                        if (height < min_height)
+                                bottom = top + min_height;
+                        break;
+
+                default: ;
+                }
+        }
+        else {
+                if (left < 0 || top < 0 ||
+                    right > pb_width || bottom > pb_height ||
+                    width < min_width || height < min_height) {
+                        left = area->priv->crop.x;
+                        right = area->priv->crop.x + area->priv->crop.width - 1;
+                        top = area->priv->crop.y;
+                        bottom = area->priv->crop.y + area->priv->crop.height - 1;
+                }
+        }
+
+        area->priv->crop.x = left;
+        area->priv->crop.y = top;
+        area->priv->crop.width = right - left + 1;
+        area->priv->crop.height = bottom - top + 1;
+
+        crop_to_widget (area, &damage);
+        gtk_widget_queue_draw_area (widget,
+                                    damage.x - 1, damage.y - 1,
+                                    damage.width + 2, damage.height + 2);
+
+        return FALSE;
+}
+
+static gboolean
+um_crop_area_button_press_event (GtkWidget      *widget,
+                                 GdkEventButton *event)
+{
+        UmCropArea *area = UM_CROP_AREA (widget);
+        GdkRectangle crop;
+
+        if (area->priv->browse_pixbuf == NULL)
+                return FALSE;
+
+        crop_to_widget (area, &crop);
+
+        area->priv->last_press_x = (event->x - area->priv->image.x) / area->priv->scale;
+        area->priv->last_press_y = (event->y - area->priv->image.y) / area->priv->scale;
+        area->priv->active_region = find_location (&crop, event->x, event->y);
+
+        gtk_widget_queue_draw_area (widget,
+                                    crop.x - 1, crop.y - 1,
+                                    crop.width + 2, crop.height + 2);
+
+        return FALSE;
+}
+
+static gboolean
+um_crop_area_button_release_event (GtkWidget      *widget,
+                                   GdkEventButton *event)
+{
+        UmCropArea *area = UM_CROP_AREA (widget);
+        GdkRectangle crop;
+
+        if (area->priv->browse_pixbuf == NULL)
+                return FALSE;
+
+        crop_to_widget (area, &crop);
+
+        area->priv->last_press_x = -1;
+        area->priv->last_press_y = -1;
+        area->priv->active_region = OUTSIDE;
+
+        gtk_widget_queue_draw_area (widget,
+                                    crop.x - 1, crop.y - 1,
+                                    crop.width + 2, crop.height + 2);
+
+        return FALSE;
+}
+
+static void
+um_crop_area_finalize (GObject *object)
+{
+        UmCropArea *area = UM_CROP_AREA (object);
+
+        if (area->priv->browse_pixbuf) {
+                g_object_unref (area->priv->browse_pixbuf);
+                area->priv->browse_pixbuf = NULL;
+        }
+        if (area->priv->pixbuf) {
+                g_object_unref (area->priv->pixbuf);
+                area->priv->pixbuf = NULL;
+        }
+        if (area->priv->color_shifted) {
+                g_object_unref (area->priv->color_shifted);
+                area->priv->color_shifted = NULL;
+        }
+}
+
+static void
+um_crop_area_class_init (UmCropAreaClass *klass)
+{
+        GObjectClass   *object_class = G_OBJECT_CLASS (klass);
+        GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+        object_class->finalize = um_crop_area_finalize;
+        widget_class->draw = um_crop_area_draw;
+        widget_class->button_press_event = um_crop_area_button_press_event;
+        widget_class->button_release_event = um_crop_area_button_release_event;
+        widget_class->motion_notify_event = um_crop_area_motion_notify_event;
+
+        g_type_class_add_private (klass, sizeof (UmCropAreaPrivate));
+}
+
+static void
+um_crop_area_init (UmCropArea *area)
+{
+        area->priv = (G_TYPE_INSTANCE_GET_PRIVATE ((area), UM_TYPE_CROP_AREA,
+                                                   UmCropAreaPrivate));
+
+        gtk_widget_add_events (GTK_WIDGET (area), GDK_POINTER_MOTION_MASK |
+                               GDK_BUTTON_PRESS_MASK |
+                               GDK_BUTTON_RELEASE_MASK);
+
+        area->priv->scale = 0.0;
+        area->priv->image.x = 0;
+        area->priv->image.y = 0;
+        area->priv->image.width = 0;
+        area->priv->image.height = 0;
+        area->priv->active_region = OUTSIDE;
+        area->priv->base_width = 48;
+        area->priv->base_height = 48;
+        area->priv->aspect = 1;
+}
+
+GtkWidget *
+um_crop_area_new (void)
+{
+        return g_object_new (UM_TYPE_CROP_AREA, NULL);
+}
+
+GdkPixbuf *
+um_crop_area_get_picture (UmCropArea *area)
+{
+        gint width, height;
+
+        width = gdk_pixbuf_get_width (area->priv->browse_pixbuf);
+        height = gdk_pixbuf_get_height (area->priv->browse_pixbuf);
+        width = MIN (area->priv->crop.width, width - area->priv->crop.x);
+        height = MIN (area->priv->crop.height, height - area->priv->crop.y);
+
+        return gdk_pixbuf_new_subpixbuf (area->priv->browse_pixbuf,
+                                         area->priv->crop.x,
+                                         area->priv->crop.y,
+                                         width, height);
+}
+
+void
+um_crop_area_set_picture (UmCropArea *area,
+                          GdkPixbuf  *pixbuf)
+{
+        int width;
+        int height;
+
+        if (area->priv->browse_pixbuf) {
+                g_object_unref (area->priv->browse_pixbuf);
+                area->priv->browse_pixbuf = NULL;
+        }
+        if (pixbuf) {
+                area->priv->browse_pixbuf = g_object_ref (pixbuf);
+                width = gdk_pixbuf_get_width (pixbuf);
+                height = gdk_pixbuf_get_height (pixbuf);
+        } else {
+                width = 0;
+                height = 0;
+        }
+
+        area->priv->crop.width = 2 * area->priv->base_width;
+        area->priv->crop.height = 2 * area->priv->base_height;
+        area->priv->crop.x = (width - area->priv->crop.width) / 2;
+        area->priv->crop.y = (height - area->priv->crop.height) / 2;
+
+        area->priv->scale = 0.0;
+        area->priv->image.x = 0;
+        area->priv->image.y = 0;
+        area->priv->image.width = 0;
+        area->priv->image.height = 0;
+
+        gtk_widget_queue_draw (GTK_WIDGET (area));
+}
+
+void
+um_crop_area_set_min_size (UmCropArea *area,
+                           gint        width,
+                           gint        height)
+{
+        area->priv->base_width = width;
+        area->priv->base_height = height;
+
+        if (area->priv->aspect > 0) {
+                area->priv->aspect = area->priv->base_width / (gdouble)area->priv->base_height;
+        }
+}
+
+void
+um_crop_area_set_constrain_aspect (UmCropArea *area,
+                                   gboolean    constrain)
+{
+        if (constrain) {
+                area->priv->aspect = area->priv->base_width / (gdouble)area->priv->base_height;
+        }
+        else {
+                area->priv->aspect = -1;
+        }
+}
+