Added ColourSelector::ColourSelectorOptions::editableColour flag to enable the colour preview box at the top of the component to be editable

examples/GUI/WidgetsDemo.h

@@ -87,7 +87,12 @@ public:
 
     void clicked() override
     {
-        auto* colourSelector = new ColourSelector();
+        auto* colourSelector = new ColourSelector (ColourSelector::showAlphaChannel
+                                                   | ColourSelector::showColourAtTop
+                                                   | ColourSelector::editableColour
+                                                   | ColourSelector::showSliders
+                                                   | ColourSelector::showColourspace);
+        
         colourSelector->setName ("background");
         colourSelector->setCurrentColour (findColour (TextButton::buttonColourId));
         colourSelector->addChangeListener (this);

modules/juce_gui_extra/misc/juce_ColourSelector.cpp

@@ -302,6 +302,85 @@ private:
     JUCE_DECLARE_NON_COPYABLE (SwatchComponent)
 };
 
+//==============================================================================
+class ColourSelector::ColourPreviewComp  : public Component
+{
+public:
+    ColourPreviewComp (ColourSelector& cs, bool isEditable)
+        : owner (cs)
+    {
+        colourLabel.setFont (labelFont);
+        colourLabel.setJustificationType (Justification::centred);
+
+        if (isEditable)
+        {
+            colourLabel.setEditable (true);
+
+            colourLabel.onEditorShow = [this]
+            {
+                if (auto* ed = colourLabel.getCurrentTextEditor())
+                    ed->setInputRestrictions ((owner.flags & showAlphaChannel) ? 8 : 6, "1234567890ABCDEFabcdef");
+            };
+
+            colourLabel.onEditorHide = [this]
+            {
+                updateColourIfNecessary (colourLabel.getText());
+            };
+        }
+
+        addAndMakeVisible (colourLabel);
+    }
+
+    void updateIfNeeded()
+    {
+        auto newColour = owner.getCurrentColour();
+
+        if (currentColour != newColour)
+        {
+            currentColour = newColour;
+            auto textColour = (Colours::white.overlaidWith (currentColour).contrasting());
+
+            colourLabel.setColour (Label::textColourId,            textColour);
+            colourLabel.setColour (Label::textWhenEditingColourId, textColour);
+            colourLabel.setText (currentColour.toDisplayString ((owner.flags & showAlphaChannel) != 0), dontSendNotification);
+
+            labelWidth = labelFont.getStringWidth (colourLabel.getText());
+
+            repaint();
+        }
+    }
+
+    void paint (Graphics& g) override
+    {
+        g.fillCheckerBoard (getLocalBounds().toFloat(), 10.0f, 10.0f,
+                            Colour (0xffdddddd).overlaidWith (currentColour),
+                            Colour (0xffffffff).overlaidWith (currentColour));
+    }
+
+    void resized() override
+    {
+        colourLabel.centreWithSize (labelWidth + 10, (int) labelFont.getHeight() + 10);
+    }
+
+private:
+    void updateColourIfNecessary (const String& newColourString)
+    {
+        auto newColour = Colour::fromString (newColourString);
+
+        if (newColour != currentColour)
+            owner.setCurrentColour (newColour);
+    }
+
+    ColourSelector& owner;
+
+    Colour currentColour;
+    Font labelFont { 14.0f, Font::bold };
+    int labelWidth = 0;
+    Label colourLabel;
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ColourPreviewComp)
+};
+
 //==============================================================================
 ColourSelector::ColourSelector (int sectionsToShow, int edge, int gapAroundColourSpaceComponent)
     : colour (Colours::white),
@@ -313,6 +392,12 @@ ColourSelector::ColourSelector (int sectionsToShow, int edge, int gapAroundColou
 
     updateHSV();
 
+    if ((flags & showColourAtTop) != 0)
+    {
+        previewComponent.reset (new ColourPreviewComp (*this, (flags & editableColour) != 0));
+        addAndMakeVisible (previewComponent.get());
+    }
+
     if ((flags & showSliders) != 0)
     {
         sliders[0].reset (new ColourComponentSlider (TRANS ("red")));
@@ -418,8 +503,8 @@ void ColourSelector::update (NotificationType notification)
         hueSelector->updateIfNeeded();
     }
 
-    if ((flags & showColourAtTop) != 0)
-        repaint (previewArea);
+    if (previewComponent != nullptr)
+        previewComponent->updateIfNeeded();
 
     if (notification != dontSendNotification)
         sendChangeMessage();
@@ -433,20 +518,6 @@ void ColourSelector::paint (Graphics& g)
 {
     g.fillAll (findColour (backgroundColourId));
 
-    if ((flags & showColourAtTop) != 0)
-    {
-        auto currentColour = getCurrentColour();
-
-        g.fillCheckerBoard (previewArea.toFloat(), 10.0f, 10.0f,
-                            Colour (0xffdddddd).overlaidWith (currentColour),
-                            Colour (0xffffffff).overlaidWith (currentColour));
-
-        g.setColour (Colours::white.overlaidWith (currentColour).contrasting());
-        g.setFont (Font (14.0f, Font::bold));
-        g.drawText (currentColour.toDisplayString ((flags & showAlphaChannel) != 0),
-                    previewArea, Justification::centred, false);
-    }
-
     if ((flags & showSliders) != 0)
     {
         g.setColour (findColour (labelTextColourId));
@@ -475,7 +546,8 @@ void ColourSelector::resized()
     const int sliderSpace = ((flags & showSliders) != 0)  ? jmin (22 * numSliders + edgeGap, proportionOfHeight (0.3f)) : 0;
     const int topSpace = ((flags & showColourAtTop) != 0) ? jmin (30 + edgeGap * 2, proportionOfHeight (0.2f)) : edgeGap;
 
-    previewArea.setBounds (edgeGap, edgeGap, getWidth() - edgeGap * 2, topSpace - edgeGap * 2);
+    if (previewComponent != nullptr)
+        previewComponent->setBounds (edgeGap, edgeGap, getWidth() - edgeGap * 2, topSpace - edgeGap * 2);
 
     int y = topSpace;
 

modules/juce_gui_extra/misc/juce_ColourSelector.h

@@ -49,8 +49,9 @@ public:
         showAlphaChannel    = 1 << 0,   /**< if set, the colour's alpha channel can be changed as well as its RGB. */
 
         showColourAtTop     = 1 << 1,   /**< if set, a swatch of the colour is shown at the top of the component. */
-        showSliders         = 1 << 2,   /**< if set, RGB sliders are shown at the bottom of the component. */
-        showColourspace     = 1 << 3    /**< if set, a big HSV selector is shown. */
+        editableColour      = 1 << 2,   /**< if set, the colour shows at the top of the component is editable. */
+        showSliders         = 1 << 3,   /**< if set, RGB sliders are shown at the bottom of the component. */
+        showColourspace     = 1 << 4    /**< if set, a big HSV selector is shown. */
     };
 
     //==============================================================================
@@ -137,6 +138,7 @@ public:
     // These need to be public otherwise the Projucer's live-build engine will complain
     class ColourSpaceView;
     class HueSelectorComp;
+    class ColourPreviewComp;
 
 private:
     //==============================================================================
@@ -147,10 +149,10 @@ private:
     std::unique_ptr<Slider> sliders[4];
     std::unique_ptr<ColourSpaceView> colourSpace;
     std::unique_ptr<HueSelectorComp> hueSelector;
+    std::unique_ptr<ColourPreviewComp> previewComponent;
     OwnedArray<SwatchComponent> swatchComponents;
     const int flags;
     int edgeGap;
-    Rectangle<int> previewArea;
 
     void setHue (float newH);
     void setSV (float newS, float newV);