DPF

commit 11837263c53025f1d0992b4c54b4ff573eccd0e6
parent d7382324edbe5e24db5a5ad327e292e999d8c16c
Author: falkTX <falktx@falktx.com>
Date:   Sun, 30 May 2021 00:03:24 +0100

Allow subwidgets to skip drawing entirely

Signed-off-by: falkTX <falktx@falktx.com>

Diffstat:
M
dgl/NanoVG.hpp
 | 
2
--
M
dgl/SubWidget.hpp
 | 
5
+++++
M
dgl/src/OpenGL.cpp
 | 
3
+++
M
dgl/src/SubWidget.cpp
 | 
5
+++++
M
dgl/src/SubWidgetPrivateData.cpp
 | 
3
++-
M
dgl/src/SubWidgetPrivateData.hpp
 | 
1
+

6 files changed, 16 insertions(+), 3 deletions(-)
diff --git a/dgl/NanoVG.hpp b/dgl/NanoVG.hpp
@@ -35,7 +35,6 @@ START_NAMESPACE_DGL
 // -----------------------------------------------------------------------
 // Forward class names
 
-class BlendishWidget;
 class NanoVG;
 
 // -----------------------------------------------------------------------
@@ -862,7 +861,6 @@ private:
     NVGcontext* const fContext;
     bool fInFrame;
     bool fIsSubWidget;
-    friend class BlendishWidget;
 
     DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(NanoVG)
 };
diff --git a/dgl/SubWidget.hpp b/dgl/SubWidget.hpp
@@ -126,6 +126,11 @@ public:
     */
     void setNeedsFullViewportDrawing(bool needsFullViewportForDrawing = true);
 
+   /**
+      Indicate that this subwidget should not be drawn on screen, typically because it is managed by something else.
+    */
+    void setSkipDrawing(bool skipDrawing = true);
+
 protected:
    /**
       A function called when the subwidget's absolute position is changed.
diff --git a/dgl/src/OpenGL.cpp b/dgl/src/OpenGL.cpp
@@ -570,6 +570,9 @@ template class ImageBaseSwitch<OpenGLImage>;
 
 void SubWidget::PrivateData::display(const uint width, const uint height, const double autoScaleFactor)
 {
+    if (skipDrawing)
+        return;
+
     bool needsDisableScissor = false;
 
     if (needsFullViewportForDrawing || (absolutePos.isZero() && self->getSize() == Size<uint>(width, height)))
diff --git a/dgl/src/SubWidget.cpp b/dgl/src/SubWidget.cpp
@@ -123,6 +123,11 @@ void SubWidget::setNeedsFullViewportDrawing(const bool needsFullViewportForDrawi
     pData->needsFullViewportForDrawing = needsFullViewportForDrawing;
 }
 
+void SubWidget::setSkipDrawing(const bool skipDrawing)
+{
+    pData->skipDrawing = skipDrawing;
+}
+
 void SubWidget::onPositionChanged(const PositionChangedEvent&)
 {
 }
diff --git a/dgl/src/SubWidgetPrivateData.cpp b/dgl/src/SubWidgetPrivateData.cpp
@@ -27,7 +27,8 @@ SubWidget::PrivateData::PrivateData(SubWidget* const s, Widget* const pw)
       parentWidget(pw),
       absolutePos(),
       needsFullViewportForDrawing(false),
-      needsViewportScaling(false)
+      needsViewportScaling(false),
+      skipDrawing(false)
 {
     parentWidget->pData->subWidgets.push_back(self);
 }
diff --git a/dgl/src/SubWidgetPrivateData.hpp b/dgl/src/SubWidgetPrivateData.hpp
@@ -30,6 +30,7 @@ struct SubWidget::PrivateData {
     Point<int> absolutePos;
     bool needsFullViewportForDrawing; // needed for widgets drawing out of bounds
     bool needsViewportScaling; // needed for NanoVG
+    bool skipDrawing;
 
     explicit PrivateData(SubWidget* const s, Widget* const pw);
     ~PrivateData();