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-rw-r--r--libgimp/gimpzoompreview.c1013
1 files changed, 1013 insertions, 0 deletions
diff --git a/libgimp/gimpzoompreview.c b/libgimp/gimpzoompreview.c
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+++ b/libgimp/gimpzoompreview.c
@@ -0,0 +1,1013 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimpzoompreview.c
+ * Copyright (C) 2005 David Odin <dindinx@gimp.org>
+ *
+ * This library 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 3 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+/* we use our own deprecated API here */
+#define GIMP_DISABLE_DEPRECATION_WARNINGS
+
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "gimpuitypes.h"
+
+#include "gimp.h"
+
+#include "gimpdrawablepreview.h"
+#include "gimpzoompreview.h"
+
+
+/**
+ * SECTION: gimpzoompreview
+ * @title: GimpZoomPreview
+ * @short_description: A drawable preview with zooming capabilities.
+ *
+ * A drawable preview with zooming capabilities.
+ **/
+
+
+enum
+{
+ PROP_0,
+ PROP_DRAWABLE,
+ PROP_DRAWABLE_ID,
+ PROP_MODEL
+};
+
+
+struct _GimpZoomPreviewPrivate
+{
+ gint32 drawable_ID;
+ GimpDrawable *drawable;
+ GimpZoomModel *model;
+ GdkRectangle extents;
+};
+
+typedef struct
+{
+ gboolean update;
+} PreviewSettings;
+
+
+#define GIMP_ZOOM_PREVIEW_GET_PRIVATE(obj) \
+ ((GimpZoomPreviewPrivate *) ((GimpZoomPreview *) (obj))->priv)
+
+static void gimp_zoom_preview_constructed (GObject *object);
+static void gimp_zoom_preview_finalize (GObject *object);
+static void gimp_zoom_preview_dispose (GObject *object);
+static void gimp_zoom_preview_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+static void gimp_zoom_preview_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+
+static void gimp_zoom_preview_set_adjustments (GimpZoomPreview *preview,
+ gdouble old_factor,
+ gdouble new_factor);
+static void gimp_zoom_preview_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation,
+ GimpZoomPreview *preview);
+static void gimp_zoom_preview_style_set (GtkWidget *widget,
+ GtkStyle *prev_style);
+static gboolean gimp_zoom_preview_scroll_event (GtkWidget *widget,
+ GdkEventScroll *event,
+ GimpZoomPreview *preview);
+static void gimp_zoom_preview_draw (GimpPreview *preview);
+static void gimp_zoom_preview_draw_buffer (GimpPreview *preview,
+ const guchar *buffer,
+ gint rowstride);
+static void gimp_zoom_preview_draw_thumb (GimpPreview *preview,
+ GimpPreviewArea *area,
+ gint width,
+ gint height);
+static void gimp_zoom_preview_set_cursor (GimpPreview *preview);
+static void gimp_zoom_preview_transform (GimpPreview *preview,
+ gint src_x,
+ gint src_y,
+ gint *dest_x,
+ gint *dest_y);
+static void gimp_zoom_preview_untransform (GimpPreview *preview,
+ gint src_x,
+ gint src_y,
+ gint *dest_x,
+ gint *dest_y);
+
+static void gimp_zoom_preview_set_drawable (GimpZoomPreview *preview,
+ GimpDrawable *drawable);
+static void gimp_zoom_preview_set_drawable_id (GimpZoomPreview *preview,
+ gint32 drawable_ID);
+static void gimp_zoom_preview_set_model (GimpZoomPreview *preview,
+ GimpZoomModel *model);
+
+static void gimp_zoom_preview_get_source_area (GimpPreview *preview,
+ gint *x,
+ gint *y,
+ gint *w,
+ gint *h);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpZoomPreview, gimp_zoom_preview,
+ GIMP_TYPE_SCROLLED_PREVIEW)
+
+#define parent_class gimp_zoom_preview_parent_class
+
+static gint gimp_zoom_preview_counter = 0;
+
+
+static void
+gimp_zoom_preview_class_init (GimpZoomPreviewClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+ GimpPreviewClass *preview_class = GIMP_PREVIEW_CLASS (klass);
+
+ object_class->constructed = gimp_zoom_preview_constructed;
+ object_class->finalize = gimp_zoom_preview_finalize;
+ object_class->dispose = gimp_zoom_preview_dispose;
+ object_class->get_property = gimp_zoom_preview_get_property;
+ object_class->set_property = gimp_zoom_preview_set_property;
+
+ widget_class->style_set = gimp_zoom_preview_style_set;
+
+ preview_class->draw = gimp_zoom_preview_draw;
+ preview_class->draw_buffer = gimp_zoom_preview_draw_buffer;
+ preview_class->draw_thumb = gimp_zoom_preview_draw_thumb;
+ preview_class->set_cursor = gimp_zoom_preview_set_cursor;
+ preview_class->transform = gimp_zoom_preview_transform;
+ preview_class->untransform = gimp_zoom_preview_untransform;
+
+ /**
+ * GimpZoomPreview:drawable:
+ *
+ * The drawable the #GimpZoomPreview is attached to.
+ *
+ * Deprecated: use the drawable-id property instead.
+ *
+ * Since: 2.4
+ */
+ g_object_class_install_property (object_class, PROP_DRAWABLE,
+ g_param_spec_pointer ("drawable",
+ "Drawable",
+ "Deprecated: use the drawable-id property instead",
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT_ONLY));
+
+ /**
+ * GimpZoomPreview:drawable-id:
+ *
+ * The drawable the #GimpZoomPreview is attached to.
+ *
+ * Since: 2.10
+ */
+ g_object_class_install_property (object_class, PROP_DRAWABLE_ID,
+ g_param_spec_int ("drawable-id",
+ "Drawable ID",
+ "The drawable this preview is attached to",
+ -1, G_MAXINT, -1,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT_ONLY));
+
+ /**
+ * GimpZoomPreview:model:
+ *
+ * The #GimpZoomModel used by this #GimpZoomPreview.
+ *
+ * Since: 2.4
+ */
+ g_object_class_install_property (object_class, PROP_MODEL,
+ g_param_spec_object ("model",
+ "Model",
+ "The zoom preview's GimpZoomModel",
+ GIMP_TYPE_ZOOM_MODEL,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT_ONLY));
+}
+
+static void
+gimp_zoom_preview_init (GimpZoomPreview *preview)
+{
+ preview->priv = gimp_zoom_preview_get_instance_private (preview);
+
+ g_signal_connect (GIMP_PREVIEW (preview)->area, "size-allocate",
+ G_CALLBACK (gimp_zoom_preview_size_allocate),
+ preview);
+ g_signal_connect (GIMP_PREVIEW (preview)->area, "scroll-event",
+ G_CALLBACK (gimp_zoom_preview_scroll_event),
+ preview);
+
+ g_object_set (GIMP_PREVIEW (preview)->area,
+ "check-size", gimp_check_size (),
+ "check-type", gimp_check_type (),
+ NULL);
+
+ gimp_scrolled_preview_set_policy (GIMP_SCROLLED_PREVIEW (preview),
+ GTK_POLICY_ALWAYS, GTK_POLICY_ALWAYS);
+}
+
+static void
+gimp_zoom_preview_constructed (GObject *object)
+{
+ GimpZoomPreviewPrivate *priv = GIMP_ZOOM_PREVIEW_GET_PRIVATE (object);
+ gchar *data_name;
+ PreviewSettings settings;
+
+ G_OBJECT_CLASS (parent_class)->constructed (object);
+
+ data_name = g_strdup_printf ("%s-zoom-preview-%d",
+ g_get_prgname (),
+ gimp_zoom_preview_counter++);
+
+ if (gimp_get_data (data_name, &settings))
+ {
+ gimp_preview_set_update (GIMP_PREVIEW (object), settings.update);
+ }
+
+ g_object_set_data_full (object, "gimp-zoom-preview-data-name",
+ data_name, (GDestroyNotify) g_free);
+
+ if (! priv->model)
+ {
+ GimpZoomModel *model = gimp_zoom_model_new ();
+
+ gimp_zoom_model_set_range (model, 1.0, 256.0);
+ gimp_zoom_preview_set_model (GIMP_ZOOM_PREVIEW (object), model);
+
+ g_object_unref (model);
+ }
+
+ gimp_zoom_preview_set_adjustments (GIMP_ZOOM_PREVIEW (object), 1.0, 1.0);
+}
+
+static void
+gimp_zoom_preview_finalize (GObject *object)
+{
+ GimpZoomPreviewPrivate *priv = GIMP_ZOOM_PREVIEW_GET_PRIVATE (object);
+
+ g_clear_object (&priv->model);
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gimp_zoom_preview_dispose (GObject *object)
+{
+ const gchar *data_name = g_object_get_data (G_OBJECT (object),
+ "gimp-zoom-preview-data-name");
+
+ if (data_name)
+ {
+ GimpPreview *preview = GIMP_PREVIEW (object);
+ PreviewSettings settings;
+
+ settings.update = gimp_preview_get_update (preview);
+
+ gimp_set_data (data_name, &settings, sizeof (PreviewSettings));
+ }
+
+ G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gimp_zoom_preview_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpZoomPreview *preview = GIMP_ZOOM_PREVIEW (object);
+
+ switch (property_id)
+ {
+ case PROP_DRAWABLE:
+ g_value_set_pointer (value, gimp_zoom_preview_get_drawable (preview));
+ break;
+
+ case PROP_DRAWABLE_ID:
+ g_value_set_int (value, gimp_zoom_preview_get_drawable_id (preview));
+ break;
+
+ case PROP_MODEL:
+ g_value_set_object (value, gimp_zoom_preview_get_model (preview));
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_zoom_preview_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpZoomPreview *preview = GIMP_ZOOM_PREVIEW (object);
+
+ switch (property_id)
+ {
+ case PROP_DRAWABLE:
+ g_return_if_fail (preview->priv->drawable_ID < 1);
+ if (g_value_get_pointer (value))
+ gimp_zoom_preview_set_drawable (preview, g_value_get_pointer (value));
+ break;
+
+ case PROP_DRAWABLE_ID:
+ gimp_zoom_preview_set_drawable_id (preview, g_value_get_int (value));
+ break;
+
+ case PROP_MODEL:
+ gimp_zoom_preview_set_model (preview, g_value_get_object (value));
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_zoom_preview_set_adjustments (GimpZoomPreview *preview,
+ gdouble old_factor,
+ gdouble new_factor)
+{
+ GimpScrolledPreview *scrolled_preview = GIMP_SCROLLED_PREVIEW (preview);
+ GtkAdjustment *adj;
+ gdouble width;
+ gdouble height;
+ gdouble ratio;
+
+ gimp_scrolled_preview_freeze (scrolled_preview);
+
+ width = GIMP_PREVIEW (preview)->width;
+ height = GIMP_PREVIEW (preview)->height;
+
+ ratio = new_factor / old_factor;
+
+ adj = gtk_range_get_adjustment (GTK_RANGE (scrolled_preview->hscr));
+ gtk_adjustment_configure (adj,
+ (gtk_adjustment_get_value (adj) + width / 2.0) * ratio
+ - width / 2.0,
+ 0,
+ width * new_factor,
+ new_factor,
+ MAX (width / 2.0, new_factor),
+ width);
+
+ adj = gtk_range_get_adjustment (GTK_RANGE (scrolled_preview->vscr));
+ gtk_adjustment_configure (adj,
+ (gtk_adjustment_get_value (adj) + height / 2.0) * ratio
+ - height / 2.0,
+ 0,
+ height * new_factor,
+ new_factor,
+ MAX (height / 2.0, new_factor),
+ height);
+
+ gimp_scrolled_preview_thaw (scrolled_preview);
+}
+
+static void
+gimp_zoom_preview_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation,
+ GimpZoomPreview *preview)
+{
+ gdouble zoom;
+
+ gint width = GIMP_PREVIEW (preview)->xmax - GIMP_PREVIEW (preview)->xmin;
+ gint height = GIMP_PREVIEW (preview)->ymax - GIMP_PREVIEW (preview)->ymin;
+
+ GIMP_PREVIEW (preview)->width = MIN (width, allocation->width);
+ GIMP_PREVIEW (preview)->height = MIN (height, allocation->height);
+
+ zoom = gimp_zoom_model_get_factor (preview->priv->model);
+
+ gimp_zoom_preview_set_adjustments (preview, zoom, zoom);
+}
+
+static void
+gimp_zoom_preview_style_set (GtkWidget *widget,
+ GtkStyle *prev_style)
+{
+ GimpPreview *preview = GIMP_PREVIEW (widget);
+ GimpZoomPreviewPrivate *priv = GIMP_ZOOM_PREVIEW (preview)->priv;
+ gint size;
+ gint width, height;
+ gint x1, y1;
+ gint x2, y2;
+
+ if (GTK_WIDGET_CLASS (parent_class)->style_set)
+ GTK_WIDGET_CLASS (parent_class)->style_set (widget, prev_style);
+
+ gtk_widget_style_get (widget, "size", &size, NULL);
+
+ if (_gimp_drawable_preview_get_bounds (priv->drawable_ID,
+ &x1, &y1, &x2, &y2))
+ {
+ width = x2 - x1;
+ height = y2 - y1;
+ }
+ else
+ {
+ width = gimp_drawable_width (priv->drawable_ID);
+ height = gimp_drawable_height (priv->drawable_ID);
+ }
+
+ if (width > height)
+ {
+ preview->width = MIN (width, size);
+ preview->height = (height * preview->width) / width;
+ }
+ else
+ {
+ preview->height = MIN (height, size);
+ preview->width = (width * preview->height) / height;
+ }
+
+ gtk_widget_set_size_request (preview->area,
+ preview->width, preview->height);
+}
+
+static gboolean
+gimp_zoom_preview_scroll_event (GtkWidget *widget,
+ GdkEventScroll *event,
+ GimpZoomPreview *preview)
+{
+ if (event->state & GDK_CONTROL_MASK)
+ {
+ GimpZoomPreviewPrivate *priv = GIMP_ZOOM_PREVIEW_GET_PRIVATE (preview);
+
+ gimp_scrolled_preview_freeze (GIMP_SCROLLED_PREVIEW (preview));
+
+ switch (event->direction)
+ {
+ case GDK_SCROLL_UP:
+ gimp_zoom_model_zoom (priv->model, GIMP_ZOOM_IN, 0.0);
+ break;
+
+ case GDK_SCROLL_DOWN:
+ gimp_zoom_model_zoom (priv->model, GIMP_ZOOM_OUT, 0.0);
+ break;
+
+ default:
+ break;
+ }
+
+ gimp_scrolled_preview_thaw (GIMP_SCROLLED_PREVIEW (preview));
+ }
+
+ return FALSE;
+}
+
+static void
+gimp_zoom_preview_draw (GimpPreview *preview)
+{
+ GimpZoomPreviewPrivate *priv = GIMP_ZOOM_PREVIEW (preview)->priv;
+ guchar *data;
+ gint width;
+ gint height;
+ gint bpp;
+
+ if (! priv->model)
+ return;
+
+ if (priv->drawable_ID < 1)
+ return;
+
+ data = gimp_zoom_preview_get_source (GIMP_ZOOM_PREVIEW (preview),
+ &width, &height, &bpp);
+
+ if (data)
+ {
+ gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview->area),
+ 0, 0, width, height,
+ gimp_drawable_type (priv->drawable_ID),
+ data, width * bpp);
+ g_free (data);
+ }
+}
+
+static void
+gimp_zoom_preview_draw_buffer (GimpPreview *preview,
+ const guchar *buffer,
+ gint rowstride)
+{
+ GimpZoomPreviewPrivate *priv = GIMP_ZOOM_PREVIEW (preview)->priv;
+ gint32 image_ID;
+
+ image_ID = gimp_item_get_image (priv->drawable_ID);
+
+ if (gimp_selection_is_empty (image_ID))
+ {
+ gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview->area),
+ 0, 0,
+ preview->width, preview->height,
+ gimp_drawable_type (priv->drawable_ID),
+ buffer,
+ rowstride);
+ }
+ else
+ {
+ guchar *sel;
+ guchar *src;
+ gint selection_ID;
+ gint width, height;
+ gint bpp;
+ gint src_x;
+ gint src_y;
+ gint src_width;
+ gint src_height;
+ gint offsx = 0;
+ gint offsy = 0;
+
+ selection_ID = gimp_image_get_selection (image_ID);
+
+ width = preview->width;
+ height = preview->height;
+
+ gimp_zoom_preview_get_source_area (preview,
+ &src_x, &src_y,
+ &src_width, &src_height);
+
+ src = gimp_drawable_get_sub_thumbnail_data (priv->drawable_ID,
+ src_x, src_y,
+ src_width, src_height,
+ &width, &height, &bpp);
+ gimp_drawable_offsets (priv->drawable_ID, &offsx, &offsy);
+ sel = gimp_drawable_get_sub_thumbnail_data (selection_ID,
+ src_x + offsx, src_y + offsy,
+ src_width, src_height,
+ &width, &height, &bpp);
+
+ gimp_preview_area_mask (GIMP_PREVIEW_AREA (preview->area),
+ 0, 0, preview->width, preview->height,
+ gimp_drawable_type (priv->drawable_ID),
+ src, width * gimp_drawable_bpp (priv->drawable_ID),
+ buffer, rowstride,
+ sel, width);
+
+ g_free (sel);
+ g_free (src);
+ }
+
+}
+
+static void
+gimp_zoom_preview_draw_thumb (GimpPreview *preview,
+ GimpPreviewArea *area,
+ gint width,
+ gint height)
+{
+ GimpZoomPreviewPrivate *priv = GIMP_ZOOM_PREVIEW (preview)->priv;
+
+ if (priv->drawable_ID > 0)
+ _gimp_drawable_preview_area_draw_thumb (area, priv->drawable_ID,
+ width, height);
+}
+
+static void
+gimp_zoom_preview_set_cursor (GimpPreview *preview)
+{
+ if (! gtk_widget_get_realized (preview->area))
+ return;
+
+ if (gimp_zoom_preview_get_factor (GIMP_ZOOM_PREVIEW (preview)) > 1.0)
+ {
+ gdk_window_set_cursor (gtk_widget_get_window (preview->area),
+ GIMP_SCROLLED_PREVIEW (preview)->cursor_move);
+ }
+ else
+ {
+ gdk_window_set_cursor (gtk_widget_get_window (preview->area),
+ preview->default_cursor);
+ }
+}
+
+static void
+gimp_zoom_preview_transform (GimpPreview *preview,
+ gint src_x,
+ gint src_y,
+ gint *dest_x,
+ gint *dest_y)
+{
+ GimpZoomPreviewPrivate *priv = GIMP_ZOOM_PREVIEW (preview)->priv;
+
+ gdouble zoom = gimp_zoom_preview_get_factor (GIMP_ZOOM_PREVIEW (preview));
+
+ *dest_x = ((gdouble) (src_x - priv->extents.x) *
+ preview->width / priv->extents.width * zoom) - preview->xoff;
+
+ *dest_y = ((gdouble) (src_y - priv->extents.y) *
+ preview->height / priv->extents.height * zoom) - preview->yoff;
+}
+
+static void
+gimp_zoom_preview_untransform (GimpPreview *preview,
+ gint src_x,
+ gint src_y,
+ gint *dest_x,
+ gint *dest_y)
+{
+ GimpZoomPreviewPrivate *priv = GIMP_ZOOM_PREVIEW (preview)->priv;
+
+ gdouble zoom = gimp_zoom_preview_get_factor (GIMP_ZOOM_PREVIEW (preview));
+
+ *dest_x = (priv->extents.x +
+ ((gdouble) (src_x + preview->xoff) *
+ priv->extents.width / preview->width / zoom));
+
+ *dest_y = (priv->extents.y +
+ ((gdouble) (src_y + preview->yoff) *
+ priv->extents.height / preview->height / zoom));
+}
+
+static void
+gimp_zoom_preview_set_drawable (GimpZoomPreview *preview,
+ GimpDrawable *drawable)
+{
+ g_return_if_fail (preview->priv->drawable == NULL);
+ g_return_if_fail (preview->priv->drawable_ID < 1);
+
+ preview->priv->drawable = drawable;
+
+ gimp_zoom_preview_set_drawable_id (preview, drawable->drawable_id);
+}
+
+static void
+gimp_zoom_preview_set_drawable_id (GimpZoomPreview *preview,
+ gint32 drawable_ID)
+{
+ GimpZoomPreviewPrivate *priv = preview->priv;
+ gint x, y;
+ gint width, height;
+ gint max_width, max_height;
+
+ g_return_if_fail (preview->priv->drawable_ID < 1);
+
+ priv->drawable_ID = drawable_ID;
+
+ if (gimp_drawable_mask_intersect (drawable_ID, &x, &y, &width, &height))
+ {
+ priv->extents.x = x;
+ priv->extents.y = y;
+ }
+ else
+ {
+ width = gimp_drawable_width (drawable_ID);
+ height = gimp_drawable_height (drawable_ID);
+
+ priv->extents.x = 0;
+ priv->extents.y = 0;
+ }
+
+ priv->extents.width = width;
+ priv->extents.height = height;
+
+ if (width > height)
+ {
+ max_width = MIN (width, 512);
+ max_height = (height * max_width) / width;
+ }
+ else
+ {
+ max_height = MIN (height, 512);
+ max_width = (width * max_height) / height;
+ }
+
+ gimp_preview_set_bounds (GIMP_PREVIEW (preview),
+ 0, 0, max_width, max_height);
+
+ g_object_set (GIMP_PREVIEW (preview)->frame,
+ "ratio", (gdouble) width / (gdouble) height,
+ NULL);
+}
+
+static void
+gimp_zoom_preview_set_model (GimpZoomPreview *preview,
+ GimpZoomModel *model)
+{
+ GimpZoomPreviewPrivate *priv = GIMP_ZOOM_PREVIEW_GET_PRIVATE (preview);
+ GtkWidget *button_bar;
+ GtkWidget *button;
+ GtkWidget *box;
+
+ g_return_if_fail (priv->model == NULL);
+
+ if (! model)
+ return;
+
+ priv->model = g_object_ref (model);
+
+ g_signal_connect_swapped (priv->model, "zoomed",
+ G_CALLBACK (gimp_zoom_preview_set_adjustments),
+ preview);
+
+ box = gimp_preview_get_controls (GIMP_PREVIEW (preview));
+ g_return_if_fail (GTK_IS_BOX (box));
+
+ button_bar = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
+ gtk_box_pack_end (GTK_BOX (box), button_bar, FALSE, FALSE, 0);
+ gtk_widget_show (button_bar);
+
+ /* zoom out */
+ button = gimp_zoom_button_new (priv->model,
+ GIMP_ZOOM_OUT, GTK_ICON_SIZE_SMALL_TOOLBAR);
+ gtk_box_pack_start (GTK_BOX (button_bar), button, FALSE, FALSE, 0);
+ gtk_widget_show (button);
+
+ /* zoom in */
+ button = gimp_zoom_button_new (priv->model,
+ GIMP_ZOOM_IN, GTK_ICON_SIZE_SMALL_TOOLBAR);
+ gtk_box_pack_start (GTK_BOX (button_bar), button, FALSE, FALSE, 0);
+ gtk_widget_show (button);
+}
+
+static void
+gimp_zoom_preview_get_source_area (GimpPreview *preview,
+ gint *x,
+ gint *y,
+ gint *w,
+ gint *h)
+{
+ GimpZoomPreviewPrivate *priv = GIMP_ZOOM_PREVIEW_GET_PRIVATE (preview);
+ gdouble zoom = gimp_zoom_model_get_factor (priv->model);
+
+ gimp_zoom_preview_untransform (preview, 0, 0, x, y);
+
+ *w = priv->extents.width / zoom;
+ *h = priv->extents.height / zoom;
+}
+
+
+/**
+ * gimp_zoom_preview_new_from_drawable_id:
+ * @drawable_ID: a drawable ID
+ *
+ * Creates a new #GimpZoomPreview widget for @drawable_ID.
+ *
+ * Since: 2.10
+ *
+ * Returns: a new #GimpZoomPreview.
+ **/
+GtkWidget *
+gimp_zoom_preview_new_from_drawable_id (gint32 drawable_ID)
+{
+ g_return_val_if_fail (gimp_item_is_valid (drawable_ID), NULL);
+ g_return_val_if_fail (gimp_item_is_drawable (drawable_ID), NULL);
+
+ return g_object_new (GIMP_TYPE_ZOOM_PREVIEW,
+ "drawable-id", drawable_ID,
+ NULL);
+}
+
+/**
+ * gimp_zoom_preview_new_with_model_from_drawable_id:
+ * @drawable_ID: a drawable ID
+ * @model: a #GimpZoomModel
+ *
+ * Creates a new #GimpZoomPreview widget for @drawable_ID using the
+ * given @model.
+ *
+ * This variant of gimp_zoom_preview_new_from_drawable_id() allows you
+ * to create a preview using an existing zoom model. This may be
+ * useful if for example you want to have two zoom previews that keep
+ * their zoom factor in sync.
+ *
+ * Since: 2.10
+ *
+ * Returns: a new #GimpZoomPreview.
+ **/
+GtkWidget *
+gimp_zoom_preview_new_with_model_from_drawable_id (gint32 drawable_ID,
+ GimpZoomModel *model)
+
+{
+ g_return_val_if_fail (gimp_item_is_valid (drawable_ID), NULL);
+ g_return_val_if_fail (gimp_item_is_drawable (drawable_ID), NULL);
+ g_return_val_if_fail (GIMP_IS_ZOOM_MODEL (model), NULL);
+
+ return g_object_new (GIMP_TYPE_ZOOM_PREVIEW,
+ "drawable-id", drawable_ID,
+ "model", model,
+ NULL);
+}
+
+/**
+ * gimp_zoom_preview_new:
+ * @drawable: a #GimpDrawable
+ *
+ * Creates a new #GimpZoomPreview widget for @drawable.
+ *
+ * Deprecated: 2.10: Use gimp_zoom_preview_new_from_drawable_id() instead.
+ *
+ * Since: 2.4
+ *
+ * Returns: a new #GimpZoomPreview.
+ **/
+GtkWidget *
+gimp_zoom_preview_new (GimpDrawable *drawable)
+{
+ g_return_val_if_fail (drawable != NULL, NULL);
+
+ return g_object_new (GIMP_TYPE_ZOOM_PREVIEW,
+ "drawable", drawable,
+ NULL);
+}
+
+/**
+ * gimp_zoom_preview_new_with_model:
+ * @drawable: a #GimpDrawable
+ * @model: a #GimpZoomModel
+ *
+ * Creates a new #GimpZoomPreview widget for @drawable using the
+ * given @model.
+ *
+ * This variant of gimp_zoom_preview_new() allows you to create a
+ * preview using an existing zoom model. This may be useful if for
+ * example you want to have two zoom previews that keep their zoom
+ * factor in sync.
+ *
+ * Deprecated: 2.10: Use gimp_zoom_preview_new_with_model_from_drawable_id()
+ * instead.
+ *
+ * Since: 2.4
+ *
+ * Returns: a new #GimpZoomPreview.
+ **/
+GtkWidget *
+gimp_zoom_preview_new_with_model (GimpDrawable *drawable,
+ GimpZoomModel *model)
+
+{
+ g_return_val_if_fail (drawable != NULL, NULL);
+ g_return_val_if_fail (GIMP_IS_ZOOM_MODEL (model), NULL);
+
+ return g_object_new (GIMP_TYPE_ZOOM_PREVIEW,
+ "drawable", drawable,
+ "model", model,
+ NULL);
+}
+
+
+/**
+ * gimp_zoom_preview_get_drawable_id:
+ * @preview: a #GimpZoomPreview widget
+ *
+ * Returns the drawable_ID the #GimpZoomPreview is attached to.
+ *
+ * Return Value: the drawable_ID that was passed to
+ * gimp_zoom_preview_new_from_drawable_id().
+ *
+ * Since: 2.10
+ **/
+gint32
+gimp_zoom_preview_get_drawable_id (GimpZoomPreview *preview)
+{
+ g_return_val_if_fail (GIMP_IS_ZOOM_PREVIEW (preview), -1);
+
+ return GIMP_ZOOM_PREVIEW_GET_PRIVATE (preview)->drawable_ID;
+}
+
+/**
+ * gimp_zoom_preview_get_drawable:
+ * @preview: a #GimpZoomPreview widget
+ *
+ * Returns the #GimpDrawable the #GimpZoomPreview is attached to.
+ *
+ * Return Value: the #GimpDrawable that was passed to gimp_zoom_preview_new().
+ *
+ * Deprecated: 2.10: Use gimp_zoom_preview_get_drawable_id() instead.
+ *
+ * Since: 2.4
+ **/
+GimpDrawable *
+gimp_zoom_preview_get_drawable (GimpZoomPreview *preview)
+{
+ g_return_val_if_fail (GIMP_IS_ZOOM_PREVIEW (preview), NULL);
+
+ return GIMP_ZOOM_PREVIEW_GET_PRIVATE (preview)->drawable;
+}
+
+/**
+ * gimp_zoom_preview_get_model:
+ * @preview: a #GimpZoomPreview widget
+ *
+ * Returns the #GimpZoomModel the preview is using.
+ *
+ * Return Value: a pointer to the #GimpZoomModel owned by the @preview
+ *
+ * Since: 2.4
+ **/
+GimpZoomModel *
+gimp_zoom_preview_get_model (GimpZoomPreview *preview)
+{
+ g_return_val_if_fail (GIMP_IS_ZOOM_PREVIEW (preview), NULL);
+
+ return GIMP_ZOOM_PREVIEW_GET_PRIVATE (preview)->model;
+}
+
+/**
+ * gimp_zoom_preview_get_factor:
+ * @preview: a #GimpZoomPreview widget
+ *
+ * Returns the zoom factor the preview is currently using.
+ *
+ * Return Value: the current zoom factor
+ *
+ * Since: 2.4
+ **/
+gdouble
+gimp_zoom_preview_get_factor (GimpZoomPreview *preview)
+{
+ GimpZoomPreviewPrivate *priv;
+
+ g_return_val_if_fail (GIMP_IS_ZOOM_PREVIEW (preview), 1.0);
+
+ priv = GIMP_ZOOM_PREVIEW_GET_PRIVATE (preview);
+
+ return priv->model ? gimp_zoom_model_get_factor (priv->model) : 1.0;
+}
+
+/**
+ * gimp_zoom_preview_get_source:
+ * @preview: a #GimpZoomPreview widget
+ * @width: a pointer to an int where the current width of the zoom widget
+ * will be put.
+ * @height: a pointer to an int where the current width of the zoom widget
+ * will be put.
+ * @bpp: return location for the number of bytes per pixel
+ *
+ * Returns the scaled image data of the part of the drawable the
+ * #GimpZoomPreview is currently showing, as a newly allocated array of guchar.
+ * This function also allow to get the current width, height and bpp of the
+ * #GimpZoomPreview.
+ *
+ * Return Value: newly allocated data that should be released using g_free()
+ * when it is not any longer needed
+ *
+ * Since: 2.4
+ */
+guchar *
+gimp_zoom_preview_get_source (GimpZoomPreview *preview,
+ gint *width,
+ gint *height,
+ gint *bpp)
+{
+ gint32 drawable_ID;
+
+ g_return_val_if_fail (GIMP_IS_ZOOM_PREVIEW (preview), NULL);
+ g_return_val_if_fail (width != NULL && height != NULL && bpp != NULL, NULL);
+
+ drawable_ID = gimp_zoom_preview_get_drawable_id (preview);
+
+ if (drawable_ID > 0)
+ {
+ GimpPreview *gimp_preview = GIMP_PREVIEW (preview);
+ gint src_x;
+ gint src_y;
+ gint src_width;
+ gint src_height;
+
+ *width = gimp_preview->width;
+ *height = gimp_preview->height;
+
+ gimp_zoom_preview_get_source_area (gimp_preview,
+ &src_x, &src_y,
+ &src_width, &src_height);
+
+ return gimp_drawable_get_sub_thumbnail_data (drawable_ID,
+ src_x, src_y,
+ src_width, src_height,
+ width, height, bpp);
+ }
+ else
+ {
+ *width = 0;
+ *height = 0;
+ *bpp = 0;
+
+ return NULL;
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-11 16:08:21 +0000