/* GIMP - The GNU Image Manipulation Program * Copyright (C) 1995 Spencer Kimball and Peter Mattis * * 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 . */ #include "config.h" #include #include #include #include #include "libgimpmath/gimpmath.h" #include "libgimpcolor/gimpcolor.h" #include "libgimpconfig/gimpconfig.h" #include "libgimpwidgets/gimpwidgets.h" #include "widgets-types.h" #include "core/gimp.h" #include "core/gimpcurve.h" #include "core/gimpcurve-map.h" #include "core/gimpmarshal.h" #include "gimpclipboard.h" #include "gimpcurveview.h" #include "gimpwidgets-utils.h" #define POINT_MAX_DISTANCE 16.0 enum { PROP_0, PROP_GIMP, PROP_BASE_LINE, PROP_GRID_ROWS, PROP_GRID_COLUMNS, PROP_X_AXIS_LABEL, PROP_Y_AXIS_LABEL }; enum { SELECTION_CHANGED, CUT_CLIPBOARD, COPY_CLIPBOARD, PASTE_CLIPBOARD, LAST_SIGNAL }; typedef struct { GimpCurve *curve; GimpRGB color; gboolean color_set; } BGCurve; static void gimp_curve_view_finalize (GObject *object); static void gimp_curve_view_dispose (GObject *object); static void gimp_curve_view_set_property (GObject *object, guint property_id, const GValue *value, GParamSpec *pspec); static void gimp_curve_view_get_property (GObject *object, guint property_id, GValue *value, GParamSpec *pspec); static void gimp_curve_view_style_set (GtkWidget *widget, GtkStyle *prev_style); static gboolean gimp_curve_view_expose (GtkWidget *widget, GdkEventExpose *event); static gboolean gimp_curve_view_button_press (GtkWidget *widget, GdkEventButton *bevent); static gboolean gimp_curve_view_button_release (GtkWidget *widget, GdkEventButton *bevent); static gboolean gimp_curve_view_motion_notify (GtkWidget *widget, GdkEventMotion *bevent); static gboolean gimp_curve_view_leave_notify (GtkWidget *widget, GdkEventCrossing *cevent); static gboolean gimp_curve_view_key_press (GtkWidget *widget, GdkEventKey *kevent); static void gimp_curve_view_cut_clipboard (GimpCurveView *view); static void gimp_curve_view_copy_clipboard (GimpCurveView *view); static void gimp_curve_view_paste_clipboard (GimpCurveView *view); static void gimp_curve_view_curve_dirty (GimpCurve *curve, GimpCurveView *view); static void gimp_curve_view_curve_notify_n_points (GimpCurve *curve, GParamSpec *pspec, GimpCurveView *view); static void gimp_curve_view_set_cursor (GimpCurveView *view, gdouble x, gdouble y); static void gimp_curve_view_unset_cursor (GimpCurveView *view); G_DEFINE_TYPE (GimpCurveView, gimp_curve_view, GIMP_TYPE_HISTOGRAM_VIEW) #define parent_class gimp_curve_view_parent_class static guint curve_view_signals[LAST_SIGNAL] = { 0 }; static void gimp_curve_view_class_init (GimpCurveViewClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass); GtkBindingSet *binding_set; object_class->finalize = gimp_curve_view_finalize; object_class->dispose = gimp_curve_view_dispose; object_class->set_property = gimp_curve_view_set_property; object_class->get_property = gimp_curve_view_get_property; widget_class->style_set = gimp_curve_view_style_set; widget_class->expose_event = gimp_curve_view_expose; widget_class->button_press_event = gimp_curve_view_button_press; widget_class->button_release_event = gimp_curve_view_button_release; widget_class->motion_notify_event = gimp_curve_view_motion_notify; widget_class->leave_notify_event = gimp_curve_view_leave_notify; widget_class->key_press_event = gimp_curve_view_key_press; klass->selection_changed = NULL; klass->cut_clipboard = gimp_curve_view_cut_clipboard; klass->copy_clipboard = gimp_curve_view_copy_clipboard; klass->paste_clipboard = gimp_curve_view_paste_clipboard; g_object_class_install_property (object_class, PROP_GIMP, g_param_spec_object ("gimp", NULL, NULL, GIMP_TYPE_GIMP, GIMP_PARAM_READWRITE)); g_object_class_install_property (object_class, PROP_BASE_LINE, g_param_spec_boolean ("base-line", NULL, NULL, TRUE, GIMP_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY)); g_object_class_install_property (object_class, PROP_GRID_ROWS, g_param_spec_int ("grid-rows", NULL, NULL, 0, 100, 8, GIMP_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY)); g_object_class_install_property (object_class, PROP_GRID_COLUMNS, g_param_spec_int ("grid-columns", NULL, NULL, 0, 100, 8, GIMP_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY)); g_object_class_install_property (object_class, PROP_X_AXIS_LABEL, g_param_spec_string ("x-axis-label", NULL, NULL, NULL, GIMP_PARAM_READWRITE)); g_object_class_install_property (object_class, PROP_Y_AXIS_LABEL, g_param_spec_string ("y-axis-label", NULL, NULL, NULL, GIMP_PARAM_READWRITE)); curve_view_signals[SELECTION_CHANGED] = g_signal_new ("selection-changed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GimpCurveViewClass, selection_changed), NULL, NULL, gimp_marshal_VOID__VOID, G_TYPE_NONE, 0); curve_view_signals[CUT_CLIPBOARD] = g_signal_new ("cut-clipboard", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GimpCurveViewClass, cut_clipboard), NULL, NULL, gimp_marshal_VOID__VOID, G_TYPE_NONE, 0); curve_view_signals[COPY_CLIPBOARD] = g_signal_new ("copy-clipboard", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GimpCurveViewClass, copy_clipboard), NULL, NULL, gimp_marshal_VOID__VOID, G_TYPE_NONE, 0); curve_view_signals[PASTE_CLIPBOARD] = g_signal_new ("paste-clipboard", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GimpCurveViewClass, paste_clipboard), NULL, NULL, gimp_marshal_VOID__VOID, G_TYPE_NONE, 0); binding_set = gtk_binding_set_by_class (klass); gtk_binding_entry_add_signal (binding_set, GDK_KEY_x, GDK_CONTROL_MASK, "cut-clipboard", 0); gtk_binding_entry_add_signal (binding_set, GDK_KEY_c, GDK_CONTROL_MASK, "copy-clipboard", 0); gtk_binding_entry_add_signal (binding_set, GDK_KEY_v, GDK_CONTROL_MASK, "paste-clipboard", 0); } static void gimp_curve_view_init (GimpCurveView *view) { view->curve = NULL; view->selected = -1; view->offset_x = 0.0; view->offset_y = 0.0; view->last_x = 0.0; view->last_y = 0.0; view->cursor_type = -1; view->xpos = -1.0; view->cursor_x = -1.0; view->cursor_y = -1.0; view->range_x_min = 0.0; view->range_x_max = 1.0; view->range_y_min = 0.0; view->range_y_max = 1.0; view->x_axis_label = NULL; view->y_axis_label = NULL; gtk_widget_set_can_focus (GTK_WIDGET (view), TRUE); gtk_widget_add_events (GTK_WIDGET (view), GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_BUTTON1_MOTION_MASK | GDK_POINTER_MOTION_MASK | GDK_KEY_PRESS_MASK | GDK_LEAVE_NOTIFY_MASK); } static void gimp_curve_view_finalize (GObject *object) { GimpCurveView *view = GIMP_CURVE_VIEW (object); g_clear_object (&view->orig_curve); g_clear_object (&view->layout); g_clear_object (&view->cursor_layout); g_clear_pointer (&view->x_axis_label, g_free); g_clear_pointer (&view->y_axis_label, g_free); G_OBJECT_CLASS (parent_class)->finalize (object); } static void gimp_curve_view_dispose (GObject *object) { GimpCurveView *view = GIMP_CURVE_VIEW (object); gimp_curve_view_set_curve (view, NULL, NULL); if (view->bg_curves) gimp_curve_view_remove_all_backgrounds (view); G_OBJECT_CLASS (parent_class)->dispose (object); } static void gimp_curve_view_set_property (GObject *object, guint property_id, const GValue *value, GParamSpec *pspec) { GimpCurveView *view = GIMP_CURVE_VIEW (object); switch (property_id) { case PROP_GIMP: view->gimp = g_value_get_object (value); /* don't ref */ break; case PROP_GRID_ROWS: view->grid_rows = g_value_get_int (value); break; case PROP_GRID_COLUMNS: view->grid_columns = g_value_get_int (value); break; case PROP_BASE_LINE: view->draw_base_line = g_value_get_boolean (value); break; case PROP_X_AXIS_LABEL: gimp_curve_view_set_x_axis_label (view, g_value_get_string (value)); break; case PROP_Y_AXIS_LABEL: gimp_curve_view_set_y_axis_label (view, g_value_get_string (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } static void gimp_curve_view_get_property (GObject *object, guint property_id, GValue *value, GParamSpec *pspec) { GimpCurveView *view = GIMP_CURVE_VIEW (object); switch (property_id) { case PROP_GIMP: g_value_set_object (value, view->gimp); break; case PROP_GRID_ROWS: g_value_set_int (value, view->grid_rows); break; case PROP_GRID_COLUMNS: g_value_set_int (value, view->grid_columns); break; case PROP_BASE_LINE: g_value_set_boolean (value, view->draw_base_line); break; case PROP_X_AXIS_LABEL: g_value_set_string (value, view->x_axis_label); break; case PROP_Y_AXIS_LABEL: g_value_set_string (value, view->y_axis_label); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } static void gimp_curve_view_style_set (GtkWidget *widget, GtkStyle *prev_style) { GimpCurveView *view = GIMP_CURVE_VIEW (widget); GTK_WIDGET_CLASS (parent_class)->style_set (widget, prev_style); g_clear_object (&view->layout); g_clear_object (&view->cursor_layout); } static void gimp_curve_view_draw_grid (GimpCurveView *view, cairo_t *cr, gint width, gint height, gint border) { gint i; for (i = 1; i < view->grid_rows; i++) { gint y = i * (height - 1) / view->grid_rows; if ((view->grid_rows % 2) == 0 && (i == view->grid_rows / 2)) continue; cairo_move_to (cr, border, border + y); cairo_line_to (cr, border + width - 1, border + y); } for (i = 1; i < view->grid_columns; i++) { gint x = i * (width - 1) / view->grid_columns; if ((view->grid_columns % 2) == 0 && (i == view->grid_columns / 2)) continue; cairo_move_to (cr, border + x, border); cairo_line_to (cr, border + x, border + height - 1); } if (view->draw_base_line) { cairo_move_to (cr, border, border + height - 1); cairo_line_to (cr, border + width - 1, border); } cairo_set_line_width (cr, 0.6); cairo_stroke (cr); if ((view->grid_rows % 2) == 0) { gint y = (height - 1) / 2; cairo_move_to (cr, border, border + y); cairo_line_to (cr, border + width - 1, border + y); } if ((view->grid_columns % 2) == 0) { gint x = (width - 1) / 2; cairo_move_to (cr, border + x, border); cairo_line_to (cr, border + x, border + height - 1); } cairo_set_line_width (cr, 1.0); cairo_stroke (cr); } static void gimp_curve_view_draw_point (GimpCurveView *view, cairo_t *cr, gint i, gint width, gint height, gint border) { gdouble x, y; gimp_curve_get_point (view->curve, i, &x, &y); y = 1.0 - y; #define CIRCLE_RADIUS 3 #define DIAMOND_RADIUS (G_SQRT2 * CIRCLE_RADIUS) switch (gimp_curve_get_point_type (view->curve, i)) { case GIMP_CURVE_POINT_SMOOTH: cairo_move_to (cr, border + (gdouble) (width - 1) * x + CIRCLE_RADIUS, border + (gdouble) (height - 1) * y); cairo_arc (cr, border + (gdouble) (width - 1) * x, border + (gdouble) (height - 1) * y, CIRCLE_RADIUS, 0, 2 * G_PI); break; case GIMP_CURVE_POINT_CORNER: cairo_move_to (cr, border + (gdouble) (width - 1) * x, border + (gdouble) (height - 1) * y - DIAMOND_RADIUS); cairo_line_to (cr, border + (gdouble) (width - 1) * x + DIAMOND_RADIUS, border + (gdouble) (height - 1) * y); cairo_line_to (cr, border + (gdouble) (width - 1) * x, border + (gdouble) (height - 1) * y + DIAMOND_RADIUS); cairo_line_to (cr, border + (gdouble) (width - 1) * x - DIAMOND_RADIUS, border + (gdouble) (height - 1) * y); cairo_close_path (cr); break; } } static void gimp_curve_view_draw_curve (GimpCurveView *view, cairo_t *cr, GimpCurve *curve, gint width, gint height, gint border) { gdouble x, y; gint i; x = 0.0; y = 1.0 - gimp_curve_map_value (curve, 0.0); cairo_move_to (cr, border + (gdouble) (width - 1) * x, border + (gdouble) (height - 1)* y); for (i = 1; i < 256; i++) { x = (gdouble) i / 255.0; y = 1.0 - gimp_curve_map_value (curve, x); cairo_line_to (cr, border + (gdouble) (width - 1) * x, border + (gdouble) (height - 1) * y); } cairo_stroke (cr); } static gboolean gimp_curve_view_expose (GtkWidget *widget, GdkEventExpose *event) { GimpCurveView *view = GIMP_CURVE_VIEW (widget); GdkWindow *window = gtk_widget_get_window (widget); GtkStyle *style = gtk_widget_get_style (widget); GtkAllocation allocation; cairo_t *cr; GList *list; gint border; gint width; gint height; gint layout_x; gint layout_y; gdouble x, y; gint i; GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event); if (! view->curve) return FALSE; gtk_widget_get_allocation (widget, &allocation); border = GIMP_HISTOGRAM_VIEW (view)->border_width; width = allocation.width - 2 * border; height = allocation.height - 2 * border; cr = gdk_cairo_create (gtk_widget_get_window (widget)); gdk_cairo_region (cr, event->region); cairo_clip (cr); if (gtk_widget_has_focus (widget)) { gtk_paint_focus (style, window, gtk_widget_get_state (widget), &event->area, widget, NULL, border - 2, border - 2, width + 4, height + 4); } cairo_set_line_width (cr, 1.0); cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE); cairo_translate (cr, 0.5, 0.5); /* Draw the grid lines */ gdk_cairo_set_source_color (cr, &style->text_aa[GTK_STATE_NORMAL]); gimp_curve_view_draw_grid (view, cr, width, height, border); /* Draw the axis labels */ if (view->x_axis_label) { if (! view->layout) view->layout = gtk_widget_create_pango_layout (widget, NULL); pango_layout_set_text (view->layout, view->x_axis_label, -1); pango_layout_get_pixel_size (view->layout, &layout_x, &layout_y); cairo_move_to (cr, width - border - layout_x, height - border - layout_y); gdk_cairo_set_source_color (cr, &style->text[GTK_STATE_NORMAL]); pango_cairo_show_layout (cr, view->layout); } if (view->y_axis_label) { if (! view->layout) view->layout = gtk_widget_create_pango_layout (widget, NULL); pango_layout_set_text (view->layout, view->y_axis_label, -1); pango_layout_get_pixel_size (view->layout, &layout_x, &layout_y); cairo_save (cr); cairo_move_to (cr, 2 * border, 2 * border + layout_x); cairo_rotate (cr, - G_PI / 2); gdk_cairo_set_source_color (cr, &style->text[GTK_STATE_NORMAL]); pango_cairo_show_layout (cr, view->layout); cairo_restore (cr); } /* Draw the background curves */ for (list = view->bg_curves; list; list = g_list_next (list)) { BGCurve *bg = list->data; if (bg->color_set) { cairo_set_source_rgba (cr, bg->color.r, bg->color.g, bg->color.b, 0.5); } else { cairo_set_source_rgba (cr, style->text[GTK_STATE_NORMAL].red / 65535.0, style->text[GTK_STATE_NORMAL].green / 65535.0, style->text[GTK_STATE_NORMAL].blue / 65535.0, 0.5); } gimp_curve_view_draw_curve (view, cr, bg->curve, width, height, border); } /* Draw the curve */ if (view->curve_color) gimp_cairo_set_source_rgb (cr, view->curve_color); else gdk_cairo_set_source_color (cr, &style->text[GTK_STATE_NORMAL]); gimp_curve_view_draw_curve (view, cr, view->curve, width, height, border); /* Draw the points */ if (gimp_curve_get_curve_type (view->curve) == GIMP_CURVE_SMOOTH) { gdk_cairo_set_source_color (cr, &style->text[GTK_STATE_NORMAL]); /* Draw the unselected points */ for (i = 0; i < view->curve->n_points; i++) { if (i == view->selected) continue; gimp_curve_view_draw_point (view, cr, i, width, height, border); } cairo_stroke (cr); /* Draw the selected point */ if (view->selected != -1) { gimp_curve_view_draw_point (view, cr, view->selected, width, height, border); cairo_fill (cr); } } if (view->xpos >= 0.0) { gchar buf[32]; gdk_cairo_set_source_color (cr, &style->text[GTK_STATE_NORMAL]); /* draw the color line */ cairo_move_to (cr, border + ROUND ((gdouble) (width - 1) * view->xpos), border + 1); cairo_line_to (cr, border + ROUND ((gdouble) (width - 1) * view->xpos), border + height - 1); cairo_stroke (cr); if (view->range_x_max == 255.0) { /* stupid heuristic: special-case for 0..255 */ g_snprintf (buf, sizeof (buf), "x:%3d", (gint) (view->xpos * (view->range_x_max - view->range_x_min) + view->range_x_min)); } else if (view->range_x_max == 100.0) { /* and for 0..100 */ g_snprintf (buf, sizeof (buf), "x:%0.2f", view->xpos * (view->range_x_max - view->range_x_min) + view->range_x_min); } else { g_snprintf (buf, sizeof (buf), "x:%0.3f", view->xpos * (view->range_x_max - view->range_x_min) + view->range_x_min); } if (! view->layout) view->layout = gtk_widget_create_pango_layout (widget, NULL); pango_layout_set_text (view->layout, buf, -1); pango_layout_get_pixel_size (view->layout, &layout_x, &layout_y); if (view->xpos < 0.5) layout_x = border; else layout_x = -(layout_x + border); cairo_move_to (cr, border + (gdouble) width * view->xpos + layout_x, border + height - border - layout_y); pango_cairo_show_layout (cr, view->layout); } if (view->cursor_x >= 0.0 && view->cursor_x <= 1.0 && view->cursor_y >= 0.0 && view->cursor_y <= 1.0) { gchar buf[32]; gint w, h; if (! view->cursor_layout) view->cursor_layout = gtk_widget_create_pango_layout (widget, NULL); if (view->range_x_max == 255.0 && view->range_y_max == 255.0) { /* stupid heuristic: special-case for 0..255 */ g_snprintf (buf, sizeof (buf), "x:%3d y:%3d", (gint) round (view->cursor_x * (view->range_x_max - view->range_x_min) + view->range_x_min), (gint) round ((1.0 - view->cursor_y) * (view->range_y_max - view->range_y_min) + view->range_y_min)); } else if (view->range_x_max == 100.0 && view->range_y_max == 100.0) { /* and for 0..100 */ g_snprintf (buf, sizeof (buf), "x:%0.2f y:%0.2f", view->cursor_x * (view->range_x_max - view->range_x_min) + view->range_x_min, (1.0 - view->cursor_y) * (view->range_y_max - view->range_y_min) + view->range_y_min); } else { g_snprintf (buf, sizeof (buf), "x:%0.3f y:%0.3f", view->cursor_x * (view->range_x_max - view->range_x_min) + view->range_x_min, (1.0 - view->cursor_y) * (view->range_y_max - view->range_y_min) + view->range_y_min); } pango_layout_set_text (view->cursor_layout, buf, -1); pango_layout_get_pixel_extents (view->cursor_layout, NULL, &view->cursor_rect); x = border * 2 + 3; y = border * 2 + 3; w = view->cursor_rect.width; h = view->cursor_rect.height; if (view->x_axis_label) x += border + view->cursor_rect.height; /* coincidentially the right value */ cairo_push_group (cr); gdk_cairo_set_source_color (cr, &style->text[GTK_STATE_NORMAL]); cairo_rectangle (cr, x + 0.5, y + 0.5, w, h); cairo_fill_preserve (cr); cairo_set_line_width (cr, 6); cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND); cairo_stroke (cr); gdk_cairo_set_source_color (cr, &style->base[GTK_STATE_NORMAL]); cairo_move_to (cr, x, y); pango_cairo_show_layout (cr, view->cursor_layout); cairo_pop_group_to_source (cr); cairo_paint_with_alpha (cr, 0.6); } cairo_destroy (cr); return FALSE; } static void set_cursor (GimpCurveView *view, GdkCursorType new_cursor) { if (new_cursor != view->cursor_type) { GdkDisplay *display = gtk_widget_get_display (GTK_WIDGET (view)); GdkCursor *cursor = gdk_cursor_new_for_display (display, new_cursor); gdk_window_set_cursor (gtk_widget_get_window (GTK_WIDGET (view)), cursor); gdk_cursor_unref (cursor); view->cursor_type = new_cursor; } } static gboolean gimp_curve_view_button_press (GtkWidget *widget, GdkEventButton *bevent) { GimpCurveView *view = GIMP_CURVE_VIEW (widget); GimpCurve *curve = view->curve; GtkAllocation allocation; gint border; gint width, height; gdouble x; gdouble y; gint point; gdouble point_x; gdouble point_y; if (! curve || bevent->button != 1) return TRUE; gtk_widget_get_allocation (widget, &allocation); border = GIMP_HISTOGRAM_VIEW (view)->border_width; width = allocation.width - 2 * border; height = allocation.height - 2 * border; x = (gdouble) (bevent->x - border) / (gdouble) width; y = (gdouble) (bevent->y - border) / (gdouble) height; x = CLAMP (x, 0.0, 1.0); y = CLAMP (y, 0.0, 1.0); view->grabbed = TRUE; view->orig_curve = GIMP_CURVE (gimp_data_duplicate (GIMP_DATA (curve))); set_cursor (view, GDK_TCROSS); switch (gimp_curve_get_curve_type (curve)) { case GIMP_CURVE_SMOOTH: point = gimp_curve_get_closest_point (curve, x, 1.0 - y, POINT_MAX_DISTANCE / MAX (width, height)); if (point < 0) { GimpCurvePointType type = GIMP_CURVE_POINT_SMOOTH; if (bevent->state & gimp_get_constrain_behavior_mask ()) y = 1.0 - gimp_curve_map_value (view->orig_curve, x); if (view->selected >= 0) type = gimp_curve_get_point_type (curve, view->selected); point = gimp_curve_add_point (curve, x, 1.0 - y); gimp_curve_set_point_type (curve, point, type); } if (point > 0) gimp_curve_get_point (curve, point - 1, &view->leftmost, NULL); else view->leftmost = -1.0; if (point < gimp_curve_get_n_points (curve) - 1) gimp_curve_get_point (curve, point + 1, &view->rightmost, NULL); else view->rightmost = 2.0; gimp_curve_view_set_selected (view, point); gimp_curve_get_point (curve, point, &point_x, &point_y); view->offset_x = point_x - x; view->offset_y = (1.0 - point_y) - y; view->point_type = gimp_curve_get_point_type (curve, point); break; case GIMP_CURVE_FREE: view->last_x = x; view->last_y = y; gimp_curve_set_curve (curve, x, 1.0 - y); break; } if (! gtk_widget_has_focus (widget)) gtk_widget_grab_focus (widget); return TRUE; } static gboolean gimp_curve_view_button_release (GtkWidget *widget, GdkEventButton *bevent) { GimpCurveView *view = GIMP_CURVE_VIEW (widget); if (bevent->button != 1) return TRUE; g_clear_object (&view->orig_curve); view->offset_x = 0.0; view->offset_y = 0.0; view->grabbed = FALSE; set_cursor (view, GDK_FLEUR); return TRUE; } static gboolean gimp_curve_view_motion_notify (GtkWidget *widget, GdkEventMotion *mevent) { GimpCurveView *view = GIMP_CURVE_VIEW (widget); GimpCurve *curve = view->curve; GtkAllocation allocation; GdkCursorType new_cursor = GDK_X_CURSOR; gint border; gint width, height; gdouble x; gdouble y; gdouble point_x; gdouble point_y; gint point; if (! curve) return TRUE; gtk_widget_get_allocation (widget, &allocation); border = GIMP_HISTOGRAM_VIEW (view)->border_width; width = allocation.width - 2 * border; height = allocation.height - 2 * border; x = (gdouble) (mevent->x - border) / (gdouble) width; y = (gdouble) (mevent->y - border) / (gdouble) height; x += view->offset_x; y += view->offset_y; x = CLAMP (x, 0.0, 1.0); y = CLAMP (y, 0.0, 1.0); switch (gimp_curve_get_curve_type (curve)) { case GIMP_CURVE_SMOOTH: if (! view->grabbed) /* If no point is grabbed... */ { point = gimp_curve_get_closest_point (curve, x, 1.0 - y, POINT_MAX_DISTANCE / MAX (width, height)); if (point >= 0) { gimp_curve_get_point (curve, point, &point_x, &point_y); new_cursor = GDK_FLEUR; x = point_x; y = 1.0 - point_y; } else { new_cursor = GDK_TCROSS; if (mevent->state & gimp_get_constrain_behavior_mask ()) y = 1.0 - gimp_curve_map_value (view->curve, x); } } else /* Else, drag the grabbed point */ { new_cursor = GDK_TCROSS; if (mevent->state & gimp_get_constrain_behavior_mask ()) y = 1.0 - gimp_curve_map_value (view->orig_curve, x); gimp_data_freeze (GIMP_DATA (curve)); if (x > view->leftmost && x < view->rightmost) { if (view->selected < 0) { gimp_curve_view_set_selected ( view, gimp_curve_add_point (curve, x, 1.0 - y)); gimp_curve_set_point_type (curve, view->selected, view->point_type); } else { gimp_curve_set_point (curve, view->selected, x, 1.0 - y); } } else { if (view->selected >= 0) { gimp_curve_delete_point (curve, view->selected); gimp_curve_view_set_selected (view, -1); } } gimp_data_thaw (GIMP_DATA (curve)); } break; case GIMP_CURVE_FREE: if (view->grabbed) { gint n_samples = gimp_curve_get_n_samples (curve); gdouble x1, x2; gdouble y1, y2; if (view->last_x > x) { x1 = x; x2 = view->last_x; y1 = y; y2 = view->last_y; } else { x1 = view->last_x; x2 = x; y1 = view->last_y; y2 = y; } if (x2 != x1) { gint from = ROUND (x1 * (gdouble) (n_samples - 1)); gint to = ROUND (x2 * (gdouble) (n_samples - 1)); gint i; gimp_data_freeze (GIMP_DATA (curve)); for (i = from; i <= to; i++) { gdouble xpos = (gdouble) i / (gdouble) (n_samples - 1); gdouble ypos = (y1 + ((y2 - y1) * (xpos - x1)) / (x2 - x1)); xpos = CLAMP (xpos, 0.0, 1.0); ypos = CLAMP (ypos, 0.0, 1.0); gimp_curve_set_curve (curve, xpos, 1.0 - ypos); } gimp_data_thaw (GIMP_DATA (curve)); } else { gimp_curve_set_curve (curve, x, 1.0 - y); } view->last_x = x; view->last_y = y; } if (mevent->state & GDK_BUTTON1_MASK) new_cursor = GDK_TCROSS; else new_cursor = GDK_PENCIL; break; } set_cursor (view, new_cursor); gimp_curve_view_set_cursor (view, x, y); return TRUE; } static gboolean gimp_curve_view_leave_notify (GtkWidget *widget, GdkEventCrossing *cevent) { GimpCurveView *view = GIMP_CURVE_VIEW (widget); gimp_curve_view_unset_cursor (view); return TRUE; } static gboolean gimp_curve_view_key_press (GtkWidget *widget, GdkEventKey *kevent) { GimpCurveView *view = GIMP_CURVE_VIEW (widget); GimpCurve *curve = view->curve; gboolean handled = FALSE; if (! view->grabbed && curve && gimp_curve_get_curve_type (curve) == GIMP_CURVE_SMOOTH && view->selected >= 0) { gint i = view->selected; gdouble x, y; gimp_curve_get_point (curve, i, NULL, &y); switch (kevent->keyval) { case GDK_KEY_Left: for (i = i - 1; i >= 0 && ! handled; i--) { gimp_curve_get_point (curve, i, &x, NULL); if (x >= 0.0) { gimp_curve_view_set_selected (view, i); handled = TRUE; } } break; case GDK_KEY_Right: for (i = i + 1; i < curve->n_points && ! handled; i++) { gimp_curve_get_point (curve, i, &x, NULL); if (x >= 0.0) { gimp_curve_view_set_selected (view, i); handled = TRUE; } } break; case GDK_KEY_Up: if (y < 1.0) { y = y + (kevent->state & GDK_SHIFT_MASK ? (16.0 / 255.0) : (1.0 / 255.0)); gimp_curve_move_point (curve, i, CLAMP (y, 0.0, 1.0)); handled = TRUE; } break; case GDK_KEY_Down: if (y > 0) { y = y - (kevent->state & GDK_SHIFT_MASK ? (16.0 / 255.0) : (1.0 / 255.0)); gimp_curve_move_point (curve, i, CLAMP (y, 0.0, 1.0)); handled = TRUE; } break; case GDK_KEY_Delete: gimp_curve_delete_point (curve, i); break; default: break; } } if (handled) { set_cursor (view, GDK_TCROSS); return TRUE; } return GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, kevent); } static void gimp_curve_view_cut_clipboard (GimpCurveView *view) { g_printerr ("%s\n", G_STRFUNC); if (! view->curve || ! view->gimp) { gtk_widget_error_bell (GTK_WIDGET (view)); return; } gimp_curve_view_copy_clipboard (view); gimp_curve_reset (view->curve, FALSE); } static void gimp_curve_view_copy_clipboard (GimpCurveView *view) { GimpCurve *copy; g_printerr ("%s\n", G_STRFUNC); if (! view->curve || ! view->gimp) { gtk_widget_error_bell (GTK_WIDGET (view)); return; } copy = GIMP_CURVE (gimp_data_duplicate (GIMP_DATA (view->curve))); gimp_clipboard_set_curve (view->gimp, copy); g_object_unref (copy); } static void gimp_curve_view_paste_clipboard (GimpCurveView *view) { GimpCurve *copy; g_printerr ("%s\n", G_STRFUNC); if (! view->curve || ! view->gimp) { gtk_widget_error_bell (GTK_WIDGET (view)); return; } copy = gimp_clipboard_get_curve (view->gimp); if (copy) { gimp_config_copy (GIMP_CONFIG (copy), GIMP_CONFIG (view->curve), 0); g_object_unref (copy); } } static void gimp_curve_view_curve_dirty (GimpCurve *curve, GimpCurveView *view) { gtk_widget_queue_draw (GTK_WIDGET (view)); } static void gimp_curve_view_curve_notify_n_points (GimpCurve *curve, GParamSpec *pspec, GimpCurveView *view) { gimp_curve_view_set_selected (view, -1); } /* public functions */ GtkWidget * gimp_curve_view_new (void) { return g_object_new (GIMP_TYPE_CURVE_VIEW, NULL); } void gimp_curve_view_set_curve (GimpCurveView *view, GimpCurve *curve, const GimpRGB *color) { g_return_if_fail (GIMP_IS_CURVE_VIEW (view)); g_return_if_fail (curve == NULL || GIMP_IS_CURVE (curve)); if (view->curve == curve) return; if (view->curve) { g_signal_handlers_disconnect_by_func (view->curve, gimp_curve_view_curve_dirty, view); g_signal_handlers_disconnect_by_func (view->curve, gimp_curve_view_curve_notify_n_points, view); g_object_unref (view->curve); } view->curve = curve; if (view->curve) { g_object_ref (view->curve); g_signal_connect (view->curve, "dirty", G_CALLBACK (gimp_curve_view_curve_dirty), view); g_signal_connect (view->curve, "notify::n-points", G_CALLBACK (gimp_curve_view_curve_notify_n_points), view); } if (view->curve_color) g_free (view->curve_color); if (color) view->curve_color = g_memdup (color, sizeof (GimpRGB)); else view->curve_color = NULL; gimp_curve_view_set_selected (view, -1); gtk_widget_queue_draw (GTK_WIDGET (view)); } GimpCurve * gimp_curve_view_get_curve (GimpCurveView *view) { g_return_val_if_fail (GIMP_IS_CURVE_VIEW (view), NULL); return view->curve; } void gimp_curve_view_add_background (GimpCurveView *view, GimpCurve *curve, const GimpRGB *color) { GList *list; BGCurve *bg; g_return_if_fail (GIMP_IS_CURVE_VIEW (view)); g_return_if_fail (GIMP_IS_CURVE (curve)); for (list = view->bg_curves; list; list = g_list_next (list)) { bg = list->data; g_return_if_fail (curve != bg->curve); } bg = g_slice_new0 (BGCurve); bg->curve = g_object_ref (curve); if (color) { bg->color = *color; bg->color_set = TRUE; } g_signal_connect (bg->curve, "dirty", G_CALLBACK (gimp_curve_view_curve_dirty), view); view->bg_curves = g_list_append (view->bg_curves, bg); gtk_widget_queue_draw (GTK_WIDGET (view)); } void gimp_curve_view_remove_background (GimpCurveView *view, GimpCurve *curve) { GList *list; g_return_if_fail (GIMP_IS_CURVE_VIEW (view)); g_return_if_fail (GIMP_IS_CURVE (curve)); for (list = view->bg_curves; list; list = g_list_next (list)) { BGCurve *bg = list->data; if (bg->curve == curve) { g_signal_handlers_disconnect_by_func (bg->curve, gimp_curve_view_curve_dirty, view); g_object_unref (bg->curve); view->bg_curves = g_list_remove (view->bg_curves, bg); g_slice_free (BGCurve, bg); gtk_widget_queue_draw (GTK_WIDGET (view)); break; } } if (! list) g_return_if_reached (); } void gimp_curve_view_remove_all_backgrounds (GimpCurveView *view) { g_return_if_fail (GIMP_IS_CURVE_VIEW (view)); while (view->bg_curves) { BGCurve *bg = view->bg_curves->data; g_signal_handlers_disconnect_by_func (bg->curve, gimp_curve_view_curve_dirty, view); g_object_unref (bg->curve); view->bg_curves = g_list_remove (view->bg_curves, bg); g_slice_free (BGCurve, bg); } gtk_widget_queue_draw (GTK_WIDGET (view)); } void gimp_curve_view_set_selected (GimpCurveView *view, gint selected) { g_return_if_fail (GIMP_IS_CURVE_VIEW (view)); if (selected != view->selected) { view->selected = selected; g_signal_emit (view, curve_view_signals[SELECTION_CHANGED], 0); gtk_widget_queue_draw (GTK_WIDGET (view)); } } gint gimp_curve_view_get_selected (GimpCurveView *view) { g_return_val_if_fail (GIMP_IS_CURVE_VIEW (view), -1); if (view->curve && view->selected < gimp_curve_get_n_points (view->curve)) return view->selected; else return -1; } void gimp_curve_view_set_range_x (GimpCurveView *view, gdouble min, gdouble max) { g_return_if_fail (GIMP_IS_CURVE_VIEW (view)); view->range_x_min = min; view->range_x_max = max; gtk_widget_queue_draw (GTK_WIDGET (view)); } void gimp_curve_view_set_range_y (GimpCurveView *view, gdouble min, gdouble max) { g_return_if_fail (GIMP_IS_CURVE_VIEW (view)); view->range_y_min = min; view->range_y_max = max; gtk_widget_queue_draw (GTK_WIDGET (view)); } void gimp_curve_view_set_xpos (GimpCurveView *view, gdouble x) { g_return_if_fail (GIMP_IS_CURVE_VIEW (view)); view->xpos = x; gtk_widget_queue_draw (GTK_WIDGET (view)); } void gimp_curve_view_set_x_axis_label (GimpCurveView *view, const gchar *label) { g_return_if_fail (GIMP_IS_CURVE_VIEW (view)); if (view->x_axis_label) g_free (view->x_axis_label); view->x_axis_label = g_strdup (label); g_object_notify (G_OBJECT (view), "x-axis-label"); gtk_widget_queue_draw (GTK_WIDGET (view)); } void gimp_curve_view_set_y_axis_label (GimpCurveView *view, const gchar *label) { g_return_if_fail (GIMP_IS_CURVE_VIEW (view)); if (view->y_axis_label) g_free (view->y_axis_label); view->y_axis_label = g_strdup (label); g_object_notify (G_OBJECT (view), "y-axis-label"); gtk_widget_queue_draw (GTK_WIDGET (view)); } /* private functions */ static void gimp_curve_view_set_cursor (GimpCurveView *view, gdouble x, gdouble y) { view->cursor_x = x; view->cursor_y = y; /* TODO: only invalidate the cursor label area */ gtk_widget_queue_draw (GTK_WIDGET (view)); } static void gimp_curve_view_unset_cursor (GimpCurveView *view) { view->cursor_x = -1.0; view->cursor_y = -1.0; /* TODO: only invalidate the cursor label area */ gtk_widget_queue_draw (GTK_WIDGET (view)); }