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-rw-r--r--app/tools/gimpsheartool.c331
1 files changed, 331 insertions, 0 deletions
diff --git a/app/tools/gimpsheartool.c b/app/tools/gimpsheartool.c
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+++ b/app/tools/gimpsheartool.c
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+/* 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpmath/gimpmath.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "tools-types.h"
+
+#include "core/gimp-transform-utils.h"
+
+#include "widgets/gimphelp-ids.h"
+#include "widgets/gimpspinscale.h"
+
+#include "display/gimpdisplay.h"
+#include "display/gimptoolgui.h"
+#include "display/gimptoolsheargrid.h"
+
+#include "gimpsheartool.h"
+#include "gimptoolcontrol.h"
+#include "gimptransformgridoptions.h"
+
+#include "gimp-intl.h"
+
+
+/* index into trans_info array */
+enum
+{
+ ORIENTATION,
+ SHEAR_X,
+ SHEAR_Y
+};
+
+
+#define SB_WIDTH 10
+
+
+/* local function prototypes */
+
+static gboolean gimp_shear_tool_info_to_matrix (GimpTransformGridTool *tg_tool,
+ GimpMatrix3 *transform);
+static gchar * gimp_shear_tool_get_undo_desc (GimpTransformGridTool *tg_tool);
+static void gimp_shear_tool_dialog (GimpTransformGridTool *tg_tool);
+static void gimp_shear_tool_dialog_update (GimpTransformGridTool *tg_tool);
+static void gimp_shear_tool_prepare (GimpTransformGridTool *tg_tool);
+static GimpToolWidget * gimp_shear_tool_get_widget (GimpTransformGridTool *tg_tool);
+static void gimp_shear_tool_update_widget (GimpTransformGridTool *tg_tool);
+static void gimp_shear_tool_widget_changed (GimpTransformGridTool *tg_tool);
+
+static void shear_x_mag_changed (GtkAdjustment *adj,
+ GimpTransformGridTool *tg_tool);
+static void shear_y_mag_changed (GtkAdjustment *adj,
+ GimpTransformGridTool *tg_tool);
+
+
+G_DEFINE_TYPE (GimpShearTool, gimp_shear_tool, GIMP_TYPE_TRANSFORM_GRID_TOOL)
+
+#define parent_class gimp_shear_tool_parent_class
+
+
+void
+gimp_shear_tool_register (GimpToolRegisterCallback callback,
+ gpointer data)
+{
+ (* callback) (GIMP_TYPE_SHEAR_TOOL,
+ GIMP_TYPE_TRANSFORM_GRID_OPTIONS,
+ gimp_transform_grid_options_gui,
+ 0,
+ "gimp-shear-tool",
+ _("Shear"),
+ _("Shear Tool: Shear the layer, selection or path"),
+ N_("S_hear"), "<shift>H",
+ NULL, GIMP_HELP_TOOL_SHEAR,
+ GIMP_ICON_TOOL_SHEAR,
+ data);
+}
+
+static void
+gimp_shear_tool_class_init (GimpShearToolClass *klass)
+{
+ GimpTransformToolClass *tr_class = GIMP_TRANSFORM_TOOL_CLASS (klass);
+ GimpTransformGridToolClass *tg_class = GIMP_TRANSFORM_GRID_TOOL_CLASS (klass);
+
+ tg_class->info_to_matrix = gimp_shear_tool_info_to_matrix;
+ tg_class->get_undo_desc = gimp_shear_tool_get_undo_desc;
+ tg_class->dialog = gimp_shear_tool_dialog;
+ tg_class->dialog_update = gimp_shear_tool_dialog_update;
+ tg_class->prepare = gimp_shear_tool_prepare;
+ tg_class->get_widget = gimp_shear_tool_get_widget;
+ tg_class->update_widget = gimp_shear_tool_update_widget;
+ tg_class->widget_changed = gimp_shear_tool_widget_changed;
+
+ tr_class->progress_text = C_("undo-type", "Shear");
+ tr_class->progress_text = _("Shearing");
+ tg_class->ok_button_label = _("_Shear");
+}
+
+static void
+gimp_shear_tool_init (GimpShearTool *shear_tool)
+{
+ GimpTool *tool = GIMP_TOOL (shear_tool);
+
+ gimp_tool_control_set_tool_cursor (tool->control, GIMP_TOOL_CURSOR_SHEAR);
+}
+
+static gboolean
+gimp_shear_tool_info_to_matrix (GimpTransformGridTool *tg_tool,
+ GimpMatrix3 *transform)
+{
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+ gdouble amount;
+
+ if (tg_tool->trans_info[SHEAR_X] == 0.0 &&
+ tg_tool->trans_info[SHEAR_Y] == 0.0)
+ {
+ tg_tool->trans_info[ORIENTATION] = GIMP_ORIENTATION_UNKNOWN;
+ }
+
+ if (tg_tool->trans_info[ORIENTATION] == GIMP_ORIENTATION_HORIZONTAL)
+ amount = tg_tool->trans_info[SHEAR_X];
+ else
+ amount = tg_tool->trans_info[SHEAR_Y];
+
+ gimp_matrix3_identity (transform);
+ gimp_transform_matrix_shear (transform,
+ tr_tool->x1,
+ tr_tool->y1,
+ tr_tool->x2 - tr_tool->x1,
+ tr_tool->y2 - tr_tool->y1,
+ tg_tool->trans_info[ORIENTATION],
+ amount);
+
+ return TRUE;
+}
+
+static gchar *
+gimp_shear_tool_get_undo_desc (GimpTransformGridTool *tg_tool)
+{
+ gdouble x = tg_tool->trans_info[SHEAR_X];
+ gdouble y = tg_tool->trans_info[SHEAR_Y];
+
+ switch ((gint) tg_tool->trans_info[ORIENTATION])
+ {
+ case GIMP_ORIENTATION_HORIZONTAL:
+ return g_strdup_printf (C_("undo-type", "Shear horizontally by %-3.3g"),
+ x);
+
+ case GIMP_ORIENTATION_VERTICAL:
+ return g_strdup_printf (C_("undo-type", "Shear vertically by %-3.3g"),
+ y);
+
+ default:
+ /* e.g. user entered numbers but no notification callback */
+ return g_strdup_printf (C_("undo-type", "Shear horizontally by %-3.3g, vertically by %-3.3g"),
+ x, y);
+ }
+}
+
+static void
+gimp_shear_tool_dialog (GimpTransformGridTool *tg_tool)
+{
+ GimpShearTool *shear = GIMP_SHEAR_TOOL (tg_tool);
+ GtkWidget *vbox;
+ GtkWidget *scale;
+
+ vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
+ gtk_box_pack_start (GTK_BOX (gimp_tool_gui_get_vbox (tg_tool->gui)), vbox,
+ FALSE, FALSE, 0);
+ gtk_widget_show (vbox);
+
+ shear->x_adj = (GtkAdjustment *)
+ gtk_adjustment_new (0, -65536, 65536, 1, 10, 0);
+ scale = gimp_spin_scale_new (shear->x_adj, _("Shear magnitude _X"), 0);
+ gimp_spin_scale_set_scale_limits (GIMP_SPIN_SCALE (scale), -1000, 1000);
+ gtk_box_pack_start (GTK_BOX (vbox), scale, FALSE, FALSE, 0);
+ gtk_widget_show (scale);
+
+ g_signal_connect (shear->x_adj, "value-changed",
+ G_CALLBACK (shear_x_mag_changed),
+ tg_tool);
+
+ shear->y_adj = (GtkAdjustment *)
+ gtk_adjustment_new (0, -65536, 65536, 1, 10, 0);
+ scale = gimp_spin_scale_new (shear->y_adj, _("Shear magnitude _Y"), 0);
+ gimp_spin_scale_set_scale_limits (GIMP_SPIN_SCALE (scale), -1000, 1000);
+ gtk_box_pack_start (GTK_BOX (vbox), scale, FALSE, FALSE, 0);
+ gtk_widget_show (scale);
+
+ g_signal_connect (shear->y_adj, "value-changed",
+ G_CALLBACK (shear_y_mag_changed),
+ tg_tool);
+}
+
+static void
+gimp_shear_tool_dialog_update (GimpTransformGridTool *tg_tool)
+{
+ GimpShearTool *shear = GIMP_SHEAR_TOOL (tg_tool);
+
+ gtk_adjustment_set_value (shear->x_adj, tg_tool->trans_info[SHEAR_X]);
+ gtk_adjustment_set_value (shear->y_adj, tg_tool->trans_info[SHEAR_Y]);
+}
+
+static void
+gimp_shear_tool_prepare (GimpTransformGridTool *tg_tool)
+{
+ tg_tool->trans_info[ORIENTATION] = GIMP_ORIENTATION_UNKNOWN;
+ tg_tool->trans_info[SHEAR_X] = 0.0;
+ tg_tool->trans_info[SHEAR_Y] = 0.0;
+}
+
+static GimpToolWidget *
+gimp_shear_tool_get_widget (GimpTransformGridTool *tg_tool)
+{
+ GimpTool *tool = GIMP_TOOL (tg_tool);
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+ GimpDisplayShell *shell = gimp_display_get_shell (tool->display);
+ GimpToolWidget *widget;
+
+ widget = gimp_tool_shear_grid_new (shell,
+ tr_tool->x1,
+ tr_tool->y1,
+ tr_tool->x2,
+ tr_tool->y2,
+ tg_tool->trans_info[ORIENTATION],
+ tg_tool->trans_info[SHEAR_X],
+ tg_tool->trans_info[SHEAR_Y]);
+
+ g_object_set (widget,
+ "inside-function", GIMP_TRANSFORM_FUNCTION_SHEAR,
+ "outside-function", GIMP_TRANSFORM_FUNCTION_SHEAR,
+ "frompivot-shear", TRUE,
+ NULL);
+
+ return widget;
+}
+
+static void
+gimp_shear_tool_update_widget (GimpTransformGridTool *tg_tool)
+{
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+
+ GIMP_TRANSFORM_GRID_TOOL_CLASS (parent_class)->update_widget (tg_tool);
+
+ g_object_set (tg_tool->widget,
+ "x1", (gdouble) tr_tool->x1,
+ "y1", (gdouble) tr_tool->y1,
+ "x2", (gdouble) tr_tool->x2,
+ "y2", (gdouble) tr_tool->y2,
+ "orientation", (gint) tg_tool->trans_info[ORIENTATION],
+ "shear-x", tg_tool->trans_info[SHEAR_X],
+ "shear-y", tg_tool->trans_info[SHEAR_Y],
+ NULL);
+}
+
+static void
+gimp_shear_tool_widget_changed (GimpTransformGridTool *tg_tool)
+{
+ GimpOrientationType orientation;
+
+ g_object_get (tg_tool->widget,
+ "orientation", &orientation,
+ "shear-x", &tg_tool->trans_info[SHEAR_X],
+ "shear-y", &tg_tool->trans_info[SHEAR_Y],
+ NULL);
+
+ tg_tool->trans_info[ORIENTATION] = orientation;
+
+ GIMP_TRANSFORM_GRID_TOOL_CLASS (parent_class)->widget_changed (tg_tool);
+}
+
+static void
+shear_x_mag_changed (GtkAdjustment *adj,
+ GimpTransformGridTool *tg_tool)
+{
+ gdouble value = gtk_adjustment_get_value (adj);
+
+ if (value != tg_tool->trans_info[SHEAR_X])
+ {
+ GimpTool *tool = GIMP_TOOL (tg_tool);
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+
+ tg_tool->trans_info[ORIENTATION] = GIMP_ORIENTATION_HORIZONTAL;
+
+ tg_tool->trans_info[SHEAR_X] = value;
+ tg_tool->trans_info[SHEAR_Y] = 0.0; /* can only shear in one axis */
+
+ gimp_transform_grid_tool_push_internal_undo (tg_tool, TRUE);
+
+ gimp_transform_tool_recalc_matrix (tr_tool, tool->display);
+ }
+}
+
+static void
+shear_y_mag_changed (GtkAdjustment *adj,
+ GimpTransformGridTool *tg_tool)
+{
+ gdouble value = gtk_adjustment_get_value (adj);
+
+ if (value != tg_tool->trans_info[SHEAR_Y])
+ {
+ GimpTool *tool = GIMP_TOOL (tg_tool);
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+
+ tg_tool->trans_info[ORIENTATION] = GIMP_ORIENTATION_VERTICAL;
+
+ tg_tool->trans_info[SHEAR_Y] = value;
+ tg_tool->trans_info[SHEAR_X] = 0.0; /* can only shear in one axis */
+
+ gimp_transform_grid_tool_push_internal_undo (tg_tool, TRUE);
+
+ gimp_transform_tool_recalc_matrix (tr_tool, tool->display);
+ }
+}
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