Nicer symbol for guide anchor

(bzr r7182)

1 files changed, 190 insertions, 0 deletions

diff --git a/src/display/sp-ctrlpoint.cpp b/src/display/sp-ctrlpoint.cpp
new file mode 100644
index 000000000..279d3f7f8
--- /dev/null
+++ b/src/display/sp-ctrlpoint.cpp
@@ -0,0 +1,190 @@
+#define __INKSCAPE_CTRLPOINT_C__
+
+/*
+ * Simple point
+ *
+ * Author:
+ *   Maximilian Albert <maximilian.albert@gmail.com>
+ *
+ * Copyright (C) 2008 Maximilian Albert
+ *
+ * Released under GNU GPL
+ */
+
+#include "display-forward.h"
+#include "sp-canvas-util.h"
+#include "sp-ctrlpoint.h"
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <color.h>
+#include "display/inkscape-cairo.h"
+
+
+static void sp_ctrlpoint_class_init (SPCtrlPointClass *klass);
+static void sp_ctrlpoint_init (SPCtrlPoint *ctrlpoint);
+static void sp_ctrlpoint_destroy (GtkObject *object);
+
+static void sp_ctrlpoint_update (SPCanvasItem *item, Geom::Matrix const &affine, unsigned int flags);
+static void sp_ctrlpoint_render (SPCanvasItem *item, SPCanvasBuf *buf);
+
+static SPCanvasItemClass *parent_class;
+
+GType
+sp_ctrlpoint_get_type (void)
+{
+    static GType type = 0;
+    if (!type) {
+        GTypeInfo info = {
+            sizeof(SPCtrlPointClass),
+            NULL, NULL,
+            (GClassInitFunc) sp_ctrlpoint_class_init,
+            NULL, NULL,
+            sizeof(SPCtrlPoint),
+            0,
+            (GInstanceInitFunc) sp_ctrlpoint_init,
+            NULL
+        };
+        type = g_type_register_static(SP_TYPE_CANVAS_ITEM, "SPCtrlPoint", &info, (GTypeFlags)0);
+    }
+    return type;
+}
+
+static void
+sp_ctrlpoint_class_init (SPCtrlPointClass *klass)
+{
+    GtkObjectClass *object_class = (GtkObjectClass *) klass;
+    SPCanvasItemClass *item_class = (SPCanvasItemClass *) klass;
+
+    parent_class = (SPCanvasItemClass*)gtk_type_class (SP_TYPE_CANVAS_ITEM);
+
+    object_class->destroy = sp_ctrlpoint_destroy;
+
+    item_class->update = sp_ctrlpoint_update;
+    item_class->render = sp_ctrlpoint_render;
+}
+
+static void
+sp_ctrlpoint_init (SPCtrlPoint *ctrlpoint)
+{
+    ctrlpoint->rgba = 0x0000ff7f;
+    ctrlpoint->pt[Geom::X] = ctrlpoint->pt[Geom::Y] = 0.0;
+    ctrlpoint->item=NULL;
+    ctrlpoint->radius = 2;
+}
+
+static void
+sp_ctrlpoint_destroy (GtkObject *object)
+{
+    g_return_if_fail (object != NULL);
+    g_return_if_fail (SP_IS_CTRLPOINT (object));
+
+    SPCtrlPoint *ctrlpoint = SP_CTRLPOINT (object);
+
+    ctrlpoint->item=NULL;
+
+    if (GTK_OBJECT_CLASS (parent_class)->destroy)
+        (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
+}
+
+static void
+sp_ctrlpoint_render (SPCanvasItem *item, SPCanvasBuf *buf)
+{
+    SPCtrlPoint *cp = SP_CTRLPOINT (item);
+
+    if (!buf->ct)
+        return;
+
+    sp_canvas_prepare_buffer (buf);
+
+    guint32 rgba = cp->rgba;
+    cairo_set_source_rgba(buf->ct, SP_RGBA32_B_F(rgba), SP_RGBA32_G_F(rgba), SP_RGBA32_R_F(rgba), SP_RGBA32_A_F(rgba));
+
+    cairo_set_line_width(buf->ct, 1);
+    cairo_new_path(buf->ct);
+
+    Geom::Point pt = cp->pt * cp->affine;
+
+    cairo_arc(buf->ct, pt[Geom::X] - buf->rect.x0, pt[Geom::Y] - buf->rect.y0, cp->radius, 0.0, 2 * M_PI);
+    cairo_stroke(buf->ct);
+}
+
+static void
+sp_ctrlpoint_update (SPCanvasItem *item, Geom::Matrix const &affine, unsigned int flags)
+{
+    SPCtrlPoint *cp = SP_CTRLPOINT (item);
+
+    sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
+
+    if (parent_class->update)
+        (* parent_class->update) (item, affine, flags);
+
+    sp_canvas_item_reset_bounds (item);
+
+    cp->affine = affine;
+
+    Geom::Point pt = cp->pt * affine;
+
+    item->x1 = pt[Geom::X] - cp->radius;
+    item->y1 = pt[Geom::Y] - cp->radius;
+    item->x2 = pt[Geom::X] + cp->radius;
+    item->y2 = pt[Geom::Y] + cp->radius;
+
+    sp_canvas_request_redraw (item->canvas,
+                              (int)item->x1 - 15, (int)item->y1 - 15,
+                              (int)item->x1 + 15, (int)item->y1 + 15);
+}
+
+void
+sp_ctrlpoint_set_color (SPCtrlPoint *cp, guint32 rgba)
+{
+    g_return_if_fail (cp != NULL);
+    g_return_if_fail (SP_IS_CTRLPOINT (cp));
+
+    if (rgba != cp->rgba) {
+        SPCanvasItem *item;
+        cp->rgba = rgba;
+        item = SP_CANVAS_ITEM (cp);
+        sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
+    }
+}
+
+#define EPSILON 1e-6
+#define DIFFER(a,b) (fabs ((a) - (b)) > EPSILON)
+
+void
+sp_ctrlpoint_set_coords (SPCtrlPoint *cp, const gdouble x, const gdouble y)
+{
+    g_return_if_fail (cp != NULL);
+    g_return_if_fail (SP_IS_CTRLPOINT (cp));
+
+    if (DIFFER (x, cp->pt[Geom::X]) || DIFFER (y, cp->pt[Geom::Y])) {
+        cp->pt[Geom::X] = x;
+        cp->pt[Geom::Y] = y;
+        sp_canvas_item_request_update (SP_CANVAS_ITEM (cp));
+    }
+}
+
+void
+sp_ctrlpoint_set_coords (SPCtrlPoint *cp, const Geom::Point pt)
+{
+    sp_ctrlpoint_set_coords(cp, pt[Geom::X], pt[Geom::Y]);
+}
+
+void
+sp_ctrlpoint_set_radius (SPCtrlPoint *cp, const double r)
+{
+    cp->radius = r;
+}
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :