[goffice] GORotationSel: partial css theming.

[Morten Welinder <mortenw src gnome org>]

commit 4d630f31e0182b6cf4bdd254b98f82f6e0bdafcf
Author: Morten Welinder <terra gnome org>
Date:   Sun Dec 10 15:48:01 2017 -0500

    GORotationSel: partial css theming.

 goffice/gtk/go-rotation-sel.c |   69 ++++++++++++++++++++++++++++++++++------
 goffice/gtk/goffice.css       |    9 +++++
 2 files changed, 67 insertions(+), 11 deletions(-)
---
diff --git a/goffice/gtk/go-rotation-sel.c b/goffice/gtk/go-rotation-sel.c
index 28b5da7..f9568bf 100644
--- a/goffice/gtk/go-rotation-sel.c
+++ b/goffice/gtk/go-rotation-sel.c
@@ -36,6 +36,9 @@ struct _GORotationSel {
        int              rot_width, rot_height;
        gulong           motion_handle;
        gboolean full;
+
+       GOColor          tick_colour[2];         // [selected]
+       GOColor          tick_outline_colour[2]; // [selected]
 };
 
 typedef struct {
@@ -52,9 +55,43 @@ static guint grs_signals[LAST_SIGNAL] = { 0 };
 static GObjectClass *grs_parent_class;
 
 static void
+grs_reload_style (GORotationSel *grs)
+{
+#if GTK_CHECK_VERSION(3,20,0)
+       int qSel;
+       GtkStyleContext *ctxt_canvas =
+               gtk_widget_get_style_context (GTK_WIDGET (grs->rotate_canvas));
+       static const char * const css_sniplet[2] = {
+               "ticks",
+               "ticks:selected"
+       };
+
+       for (qSel = FALSE; qSel <= TRUE; qSel++) {
+               GtkStyleContext *ctxt = go_style_context_from_selector
+                       (ctxt_canvas, css_sniplet[qSel]);
+               GdkRGBA *c, *oc;
+
+               gtk_style_context_get (ctxt,
+                                      gtk_style_context_get_state (ctxt),
+                                      "color", &c,
+                                      "outline-color", &oc,
+                                      NULL);
+               grs->tick_colour[qSel] = GO_COLOR_FROM_GDK_RGBA (*c);
+               grs->tick_outline_colour[qSel] = GO_COLOR_FROM_GDK_RGBA (*oc);
+               gdk_rgba_free (c);
+               gdk_rgba_free (oc);
+
+       }
+#else
+       grs->tick_colour[FALSE] = GO_COLOR_BLACK;
+       grs->tick_colour[TRUE] = GO_COLOR_GREEN;
+#endif
+}
+
+
+static void
 cb_rotate_changed (GORotationSel *grs)
 {
-       GOColor colour;
        int i, maxi = grs->full? 23: 12;
        double x0 = grs->full? 100.: 15.;
        int angle;
@@ -63,15 +100,22 @@ cb_rotate_changed (GORotationSel *grs)
                gtk_spin_button_get_value_as_int (grs->rotate_spinner) % 360);
        angle = (grs->angle < -90)? grs->angle + 360: grs->angle;
 
-       for (i = 0 ; i <= maxi ; i++)
+       for (i = 0 ; i <= maxi ; i++) {
+               int mark_angle = (i - 6) * 15;
+
                if (grs->rotate_marks[i] != NULL) {
                        GOStyle *style = go_styled_object_get_style (GO_STYLED_OBJECT (grs->rotate_marks[i]));
-                       colour = (angle == (i-6)*15) ? GO_COLOR_GREEN : GO_COLOR_BLACK;
-                       if (style->fill.pattern.back != colour){
+                       gboolean qSelected = (angle == mark_angle);
+                       GOColor colour = grs->tick_colour[qSelected];
+                       GOColor outline_colour = grs->tick_outline_colour[qSelected];
+                       if (style->fill.pattern.back != colour ||
+                           style->line.color != outline_colour) {
+                               style->line.color = outline_colour;
                                style->fill.pattern.back = colour;
                                goc_item_invalidate (grs->rotate_marks[i]);
                        }
                }
+       }
 
        if (grs->line != NULL) {
                double c = go_cospi (grs->angle / 180.);
@@ -101,11 +145,12 @@ cb_rotate_canvas_realize (GocCanvas *canvas, GORotationSel *grs)
        GOStyle *go_style;
        double x0 = grs->full? 100.: 15.;
 
-       for (i = 0 ; i <= maxint ; i++) {
-               double rad = (i-6) * M_PI / 12.;
-               double x = x0 + cos (rad) * 80.;
-               double y = 100 - sin (rad) * 80.;
-               double size = (i % 3) ? 3.0 : 4.0;
+       for (i = 0 ; i <= maxint; i++) {
+               int mark_angle = (i - 6) * 15;
+               double x = x0 + go_cospi (mark_angle / 180.0) * 80.;
+               double y = 100 - go_sinpi (mark_angle / 180.0) * 80.;
+               gboolean qMajor = (i % 3 == 0);
+               double size = qMajor ? 4.0 : 3.0;
                GocItem *item = goc_item_new (group,
                        GOC_TYPE_CIRCLE,
                        "x", x, "y", y,
@@ -113,8 +158,8 @@ cb_rotate_canvas_realize (GocCanvas *canvas, GORotationSel *grs)
                        NULL);
                go_style = go_styled_object_get_style (GO_STYLED_OBJECT (item));
                go_style->line.width = 1.;
-               go_style->line.color = GO_COLOR_BLACK;
-               go_style->fill.pattern.back = GO_COLOR_BLACK;
+               go_style->line.color = grs->tick_outline_colour[FALSE];
+               go_style->fill.pattern.back = grs->tick_colour[FALSE];
                grs->rotate_marks[i] = item;
        }
        grs->line = goc_item_new (group, GOC_TYPE_LINE, NULL);
@@ -236,6 +281,8 @@ grs_init (GORotationSel *grs)
 
        _go_gtk_widget_add_css_provider (GTK_WIDGET (grs->rotate_canvas));
 
+       grs_reload_style (grs);
+
        gtk_widget_show_all (GTK_WIDGET (grs));
 }
 
diff --git a/goffice/gtk/goffice.css b/goffice/gtk/goffice.css
index 24f954e..afbdf13 100644
--- a/goffice/gtk/goffice.css
+++ b/goffice/gtk/goffice.css
@@ -11,6 +11,15 @@ rotation3dselector canvas {
   background-color: white;
 }
 
+rotationselector canvas ticks {
+  color: black;
+  outline-color: black;
+}
+
+rotationselector canvas ticks:selected {
+  color: #00ff00;
+}
+
 /* ---------------------------------------- */
 
 colorpalette button box {