From 70c9aaa9c297d2b20b7d3b466ceaf5f1def36752 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Thu, 26 May 2016 17:16:43 +0200
Subject: spline-widget: allow using as preview when disabled

---
 spline-widget/qfunctionconfigurator.cpp | 30 ++++++++++++++++++++++--------
 spline-widget/qfunctionconfigurator.h   |  5 ++++-
 2 files changed, 26 insertions(+), 9 deletions(-)

diff --git a/spline-widget/qfunctionconfigurator.cpp b/spline-widget/qfunctionconfigurator.cpp
index 18af8c46..538b5dc9 100644
--- a/spline-widget/qfunctionconfigurator.cpp
+++ b/spline-widget/qfunctionconfigurator.cpp
@@ -19,9 +19,10 @@ QFunctionConfigurator::QFunctionConfigurator(QWidget *parent) :
     QWidget(parent),
     _config(nullptr),
     moving_control_point_idx(-1),
-    _draw_function(true),
     snap_x(0),
-    snap_y(0)
+    snap_y(0),
+    _draw_function(true),
+    _preview_only(false)
 {
     update_range();
     setMouseTracking(true);
@@ -37,6 +38,16 @@ void QFunctionConfigurator::setConfig(Map* config, const QString& name) {
     update();
 }
 
+void QFunctionConfigurator::set_preview_only(bool val)
+{
+    _preview_only = val;
+}
+
+bool QFunctionConfigurator::is_preview_only() const
+{
+    return _preview_only;
+}
+
 void QFunctionConfigurator::drawBackground()
 {
     if (!_config)
@@ -47,7 +58,7 @@ void QFunctionConfigurator::drawBackground()
     painter.fillRect(rect(), QColor::fromRgb(204, 204, 204));
 
     QColor bg_color(112, 154, 209);
-    if (!isEnabled())
+    if (!isEnabled() && !_preview_only)
         bg_color = QColor(176,176,180);
     painter.fillRect(pixel_bounds, bg_color);
 
@@ -120,13 +131,13 @@ void QFunctionConfigurator::drawFunction()
 
     QColor color = spline_color;
 
-    if (!isEnabled())
+    if (!isEnabled() && !_preview_only)
     {
-        const int avg = 176;
+        const float avg = (color.red() + color.green() + color.blue())/3.f;
         auto color_ = color;
-        color = QColor(color_.red() * .5 + avg * .5,
-                       color_.green() * .5 + avg * .5,
-                       color_.blue() * .5 + avg * .5,
+        color = QColor(int(color_.red() * .5 + avg * .5),
+                       int(color_.green() * .5 + avg * .5),
+                       int(color_.blue() * .5 + avg * .5),
                        96);
     }
 
@@ -201,6 +212,9 @@ void QFunctionConfigurator::paintEvent(QPaintEvent *e)
 
 void QFunctionConfigurator::drawPoint(QPainter *painter, const QPointF &pos, QColor colBG, QColor border)
 {
+    if (_preview_only)
+        return;
+
     painter->save();
     painter->setPen(border);
     painter->setBrush( colBG );
diff --git a/spline-widget/qfunctionconfigurator.h b/spline-widget/qfunctionconfigurator.h
index ffd1dd78..1700dfca 100644
--- a/spline-widget/qfunctionconfigurator.h
+++ b/spline-widget/qfunctionconfigurator.h
@@ -19,6 +19,7 @@ class SPLINE_WIDGET_EXPORT QFunctionConfigurator : public QWidget
 {
     Q_OBJECT
     Q_PROPERTY(QColor colorBezier READ colorBezier WRITE setColorBezier)
+    Q_PROPERTY(bool is_preview_only READ is_preview_only WRITE set_preview_only)
 public:
     QFunctionConfigurator(QWidget *parent = 0);
 
@@ -39,6 +40,8 @@ public:
         _background = QPixmap();
         update();
     }
+    void set_preview_only(bool val);
+    bool is_preview_only() const;
     void set_snap(int x, int y) { snap_x = x; snap_y = y; }
     void get_snap(int& x, int& y) const { x = snap_x; y = snap_y; }
 protected slots:
@@ -72,8 +75,8 @@ private:
 
     QPixmap _background;
     QPixmap _function;
-    bool _draw_function;
     int snap_x, snap_y;
+    bool _draw_function, _preview_only;
 
     static constexpr int line_length_pixels = 3;
     static constexpr int point_size = 5;
-- 
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