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-rw-r--r--app/widgets/gimpdasheditor.c513
1 files changed, 513 insertions, 0 deletions
diff --git a/app/widgets/gimpdasheditor.c b/app/widgets/gimpdasheditor.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpdasheditor.c
+ * Copyright (C) 2003 Simon Budig <simon@gimp.org>
+ *
+ * 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpmath/gimpmath.h"
+#include "libgimpconfig/gimpconfig.h"
+
+#include "widgets-types.h"
+
+#include "core/gimpdashpattern.h"
+#include "core/gimpstrokeoptions.h"
+
+#include "gimpdasheditor.h"
+
+
+#define MIN_WIDTH 64
+#define MIN_HEIGHT 20
+
+#define DEFAULT_N_SEGMENTS 24
+
+
+enum
+{
+ PROP_0,
+ PROP_STROKE_OPTIONS,
+ PROP_N_SEGMENTS,
+ PROP_LENGTH
+};
+
+
+static void gimp_dash_editor_finalize (GObject *object);
+static void gimp_dash_editor_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_dash_editor_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+
+static void gimp_dash_editor_size_request (GtkWidget *widget,
+ GtkRequisition *requisition);
+static gboolean gimp_dash_editor_expose (GtkWidget *widget,
+ GdkEventExpose *event);
+static gboolean gimp_dash_editor_button_press (GtkWidget *widget,
+ GdkEventButton *bevent);
+static gboolean gimp_dash_editor_button_release (GtkWidget *widget,
+ GdkEventButton *bevent);
+static gboolean gimp_dash_editor_motion_notify (GtkWidget *widget,
+ GdkEventMotion *bevent);
+
+/* helper function */
+static void update_segments_from_options (GimpDashEditor *editor);
+static void update_options_from_segments (GimpDashEditor *editor);
+static void update_blocksize (GimpDashEditor *editor);
+static gint dash_x_to_index (GimpDashEditor *editor,
+ gint x);
+
+
+G_DEFINE_TYPE (GimpDashEditor, gimp_dash_editor, GTK_TYPE_DRAWING_AREA)
+
+#define parent_class gimp_dash_editor_parent_class
+
+
+static void
+gimp_dash_editor_class_init (GimpDashEditorClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+ object_class->finalize = gimp_dash_editor_finalize;
+ object_class->get_property = gimp_dash_editor_get_property;
+ object_class->set_property = gimp_dash_editor_set_property;
+
+ widget_class->size_request = gimp_dash_editor_size_request;
+ widget_class->expose_event = gimp_dash_editor_expose;
+ widget_class->button_press_event = gimp_dash_editor_button_press;
+ widget_class->button_release_event = gimp_dash_editor_button_release;
+ widget_class->motion_notify_event = gimp_dash_editor_motion_notify;
+
+ g_object_class_install_property (object_class, PROP_STROKE_OPTIONS,
+ g_param_spec_object ("stroke-options",
+ NULL, NULL,
+ GIMP_TYPE_STROKE_OPTIONS,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT_ONLY));
+
+ g_object_class_install_property (object_class, PROP_N_SEGMENTS,
+ g_param_spec_int ("n-segments",
+ NULL, NULL,
+ 2, 120, DEFAULT_N_SEGMENTS,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+
+ g_object_class_install_property (object_class, PROP_LENGTH,
+ g_param_spec_double ("dash-length",
+ NULL, NULL,
+ 0.0, 2000.0,
+ 0.5 * DEFAULT_N_SEGMENTS,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+}
+
+static void
+gimp_dash_editor_init (GimpDashEditor *editor)
+{
+ editor->segments = NULL;
+ editor->block_width = 6;
+ editor->block_height = 6;
+ editor->edit_mode = TRUE;
+ editor->edit_button_x0 = 0;
+
+ gtk_widget_add_events (GTK_WIDGET (editor),
+ GDK_BUTTON_PRESS_MASK |
+ GDK_BUTTON_RELEASE_MASK |
+ GDK_BUTTON1_MOTION_MASK);
+}
+
+static void
+gimp_dash_editor_finalize (GObject *object)
+{
+ GimpDashEditor *editor = GIMP_DASH_EDITOR (object);
+
+ g_clear_object (&editor->stroke_options);
+ g_clear_pointer (&editor->segments, g_free);
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gimp_dash_editor_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpDashEditor *editor = GIMP_DASH_EDITOR (object);
+
+ switch (property_id)
+ {
+ case PROP_STROKE_OPTIONS:
+ g_return_if_fail (editor->stroke_options == NULL);
+
+ editor->stroke_options = g_value_dup_object (value);
+ g_signal_connect_object (editor->stroke_options, "notify::dash-info",
+ G_CALLBACK (update_segments_from_options),
+ editor, G_CONNECT_SWAPPED);
+ break;
+
+ case PROP_N_SEGMENTS:
+ editor->n_segments = g_value_get_int (value);
+
+ if (editor->segments)
+ g_free (editor->segments);
+ editor->segments = g_new0 (gboolean, editor->n_segments);
+ break;
+
+ case PROP_LENGTH:
+ editor->dash_length = g_value_get_double (value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+
+ update_segments_from_options (editor);
+}
+
+static void
+gimp_dash_editor_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpDashEditor *editor = GIMP_DASH_EDITOR (object);
+
+ switch (property_id)
+ {
+ case PROP_STROKE_OPTIONS:
+ g_value_set_object (value, editor->stroke_options);
+ break;
+ case PROP_N_SEGMENTS:
+ g_value_set_int (value, editor->n_segments);
+ break;
+ case PROP_LENGTH:
+ g_value_set_double (value, editor->dash_length);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_dash_editor_size_request (GtkWidget *widget,
+ GtkRequisition *requisition)
+{
+ GimpDashEditor *editor = GIMP_DASH_EDITOR (widget);
+
+ requisition->width = MAX (editor->block_width * editor->n_segments + 20,
+ MIN_WIDTH);
+ requisition->height = MAX (editor->block_height + 10, MIN_HEIGHT);
+}
+
+static gboolean
+gimp_dash_editor_expose (GtkWidget *widget,
+ GdkEventExpose *event)
+{
+ GimpDashEditor *editor = GIMP_DASH_EDITOR (widget);
+ GtkStyle *style = gtk_widget_get_style (widget);
+ cairo_t *cr = gdk_cairo_create (gtk_widget_get_window (widget));
+ GtkAllocation allocation;
+ gint x;
+ gint w, h;
+
+ gtk_widget_get_allocation (widget, &allocation);
+
+ update_blocksize (editor);
+
+ gdk_cairo_rectangle (cr, &event->area);
+ cairo_clip (cr);
+
+ /* draw the background */
+
+ gdk_cairo_set_source_color (cr, &style->base[GTK_STATE_NORMAL]);
+ cairo_paint (cr);
+
+ w = editor->block_width;
+ h = editor->block_height;
+
+ editor->x0 = (allocation.width - w * editor->n_segments) / 2;
+ editor->y0 = (allocation.height - h) / 2;
+
+ /* draw the dash segments */
+
+ x = editor->x0 % w;
+
+ if (x > 0)
+ x -= w;
+
+ for (; x < editor->x0; x += w)
+ {
+ gint index = dash_x_to_index (editor, x);
+
+ if (editor->segments[index])
+ cairo_rectangle (cr, x, editor->y0, w, h);
+ }
+
+ gdk_cairo_set_source_color (cr, &style->text_aa[GTK_STATE_NORMAL]);
+ cairo_fill (cr);
+
+ for (; x < editor->x0 + editor->n_segments * w; x += w)
+ {
+ gint index = dash_x_to_index (editor, x);
+
+ if (editor->segments[index])
+ cairo_rectangle (cr, x, editor->y0, w, h);
+ }
+
+ gdk_cairo_set_source_color (cr, &style->text[GTK_STATE_NORMAL]);
+ cairo_fill (cr);
+
+ for (; x < allocation.width + w; x += w)
+ {
+ gint index = dash_x_to_index (editor, x);
+
+ if (editor->segments[index])
+ cairo_rectangle (cr, x, editor->y0, w, h);
+ }
+
+ gdk_cairo_set_source_color (cr, &style->text_aa[GTK_STATE_NORMAL]);
+ cairo_fill (cr);
+
+ /* draw rulers */
+
+ x = editor->x0 % w;
+
+ if (x > 0)
+ x -= w;
+
+ for (; x < allocation.width + w; x += w)
+ {
+ gint index = dash_x_to_index (editor, x);
+
+ if (editor->n_segments % 4 == 0 &&
+ (index + 1) % (editor->n_segments / 4) == 0)
+ {
+ cairo_move_to (cr, x + w - 0.5, editor->y0 - 2);
+ cairo_line_to (cr, x + w - 0.5, editor->y0 + h + 2);
+ }
+ else if (index % 2 == 1)
+ {
+ cairo_move_to (cr, x + w - 0.5, editor->y0 + 1);
+ cairo_line_to (cr, x + w - 0.5, editor->y0 + h - 1);
+ }
+ else
+ {
+ cairo_move_to (cr, x + w - 0.5, editor->y0 + h / 2 - 1);
+ cairo_line_to (cr, x + w - 0.5, editor->y0 + h / 2 + 1);
+ }
+ }
+
+ cairo_move_to (cr, editor->x0 - 0.5, editor->y0 - 1);
+ cairo_move_to (cr, editor->x0 - 0.5, editor->y0 + h);
+
+ gdk_cairo_set_source_color (cr, &style->text_aa[GTK_STATE_NORMAL]);
+ cairo_set_line_width (cr, 1.0);
+ cairo_stroke (cr);
+
+ cairo_destroy (cr);
+
+ return FALSE;
+}
+
+static gboolean
+gimp_dash_editor_button_press (GtkWidget *widget,
+ GdkEventButton *bevent)
+{
+ GimpDashEditor *editor = GIMP_DASH_EDITOR (widget);
+ gint index;
+
+ if (bevent->button == 1 && bevent->type == GDK_BUTTON_PRESS)
+ {
+ gtk_grab_add (widget);
+
+ index = dash_x_to_index (editor, bevent->x);
+
+ editor->edit_mode = ! editor->segments [index];
+ editor->edit_button_x0 = bevent->x;
+
+ editor->segments [index] = editor->edit_mode;
+
+ gtk_widget_queue_draw (widget);
+ }
+
+ return TRUE;
+}
+
+static gboolean
+gimp_dash_editor_button_release (GtkWidget *widget,
+ GdkEventButton *bevent)
+{
+ GimpDashEditor *editor = GIMP_DASH_EDITOR (widget);
+
+ if (bevent->button == 1)
+ {
+ gtk_grab_remove (widget);
+
+ update_options_from_segments (editor);
+ }
+
+ return TRUE;
+}
+
+static gboolean
+gimp_dash_editor_motion_notify (GtkWidget *widget,
+ GdkEventMotion *mevent)
+{
+ GimpDashEditor *editor = GIMP_DASH_EDITOR (widget);
+ gint x, index;
+
+ index = dash_x_to_index (editor, mevent->x);
+ editor->segments [index] = editor->edit_mode;
+
+ if (mevent->x > editor->edit_button_x0)
+ {
+ for (x = editor->edit_button_x0; x < mevent->x; x += editor->block_width)
+ {
+ index = dash_x_to_index (editor, x);
+ editor->segments[index] = editor->edit_mode;
+ }
+ }
+
+ if (mevent->x < editor->edit_button_x0)
+ {
+ for (x = editor->edit_button_x0; x > mevent->x; x -= editor->block_width)
+ {
+ index = dash_x_to_index (editor, x);
+ editor->segments[index] = editor->edit_mode;
+ }
+ }
+
+ gtk_widget_queue_draw (widget);
+
+ return TRUE;
+}
+
+GtkWidget *
+gimp_dash_editor_new (GimpStrokeOptions *stroke_options)
+{
+ g_return_val_if_fail (GIMP_IS_STROKE_OPTIONS (stroke_options), NULL);
+
+ return g_object_new (GIMP_TYPE_DASH_EDITOR,
+ "stroke-options", stroke_options,
+ NULL);
+}
+
+void
+gimp_dash_editor_shift_right (GimpDashEditor *editor)
+{
+ gboolean swap;
+ gint i;
+
+ g_return_if_fail (GIMP_IS_DASH_EDITOR (editor));
+ g_return_if_fail (editor->n_segments > 0);
+
+ swap = editor->segments[editor->n_segments - 1];
+ for (i = editor->n_segments - 1; i > 0; i--)
+ editor->segments[i] = editor->segments[i-1];
+ editor->segments[0] = swap;
+
+ update_options_from_segments (editor);
+}
+
+void
+gimp_dash_editor_shift_left (GimpDashEditor *editor)
+{
+ gboolean swap;
+ gint i;
+
+ g_return_if_fail (GIMP_IS_DASH_EDITOR (editor));
+ g_return_if_fail (editor->n_segments > 0);
+
+ swap = editor->segments[0];
+ for (i = 1; i < editor->n_segments; i++)
+ editor->segments[i-1] = editor->segments[i];
+ editor->segments[editor->n_segments - 1] = swap;
+
+ update_options_from_segments (editor);
+}
+
+static void
+update_segments_from_options (GimpDashEditor *editor)
+{
+ GArray *dash_info;
+
+ if (editor->stroke_options == NULL || editor->segments == NULL)
+ return;
+
+ g_return_if_fail (GIMP_IS_STROKE_OPTIONS (editor->stroke_options));
+
+ gtk_widget_queue_draw (GTK_WIDGET (editor));
+
+ dash_info = gimp_stroke_options_get_dash_info (editor->stroke_options);
+
+ gimp_dash_pattern_fill_segments (dash_info,
+ editor->segments, editor->n_segments);
+}
+
+static void
+update_options_from_segments (GimpDashEditor *editor)
+{
+ GArray *pattern = gimp_dash_pattern_new_from_segments (editor->segments,
+ editor->n_segments,
+ editor->dash_length);
+
+ gimp_stroke_options_take_dash_pattern (editor->stroke_options,
+ GIMP_DASH_CUSTOM, pattern);
+}
+
+static void
+update_blocksize (GimpDashEditor *editor)
+{
+ GtkWidget *widget = GTK_WIDGET (editor);
+ GtkAllocation allocation;
+
+ gtk_widget_get_allocation (widget, &allocation);
+
+ editor->block_height = 6;
+
+ editor->block_width = MAX (ROUND (editor->dash_length /
+ editor->n_segments * editor->block_height),
+ 4);
+ editor->block_height = MIN (ROUND (((float) editor->block_width) *
+ editor->n_segments / editor->dash_length),
+ allocation.height - 4);
+}
+
+static gint
+dash_x_to_index (GimpDashEditor *editor,
+ gint x)
+{
+ gint index = x - editor->x0;
+
+ while (index < 0)
+ index += editor->n_segments * editor->block_width;
+
+ index = (index / editor->block_width) % editor->n_segments;
+
+ return index;
+}
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