Expose cursor API from pugl, with added diagonal resize cursors

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

Makefile.base.mk

@@ -304,8 +304,7 @@ ifeq ($(HAVE_X11),true)
 DGL_FLAGS       += $(shell $(PKG_CONFIG) --cflags x11) -DHAVE_X11
 DGL_SYSTEM_LIBS += $(shell $(PKG_CONFIG) --libs x11)
 ifeq ($(HAVE_XCURSOR),true)
-# TODO -DHAVE_XCURSOR
-DGL_FLAGS       += $(shell $(PKG_CONFIG) --cflags xcursor)
+DGL_FLAGS       += $(shell $(PKG_CONFIG) --cflags xcursor) -DHAVE_XCURSOR
 DGL_SYSTEM_LIBS += $(shell $(PKG_CONFIG) --libs xcursor)
 endif
 ifeq ($(HAVE_XEXT),true)

dgl/Base.hpp

@@ -130,6 +130,23 @@ enum CrossingMode {
     kCrossingUngrab  ///< Crossing due to a grab release
 };
 
+/**
+   A mouse cursor type.
+
+   This is a portable subset of mouse cursors that exist on X11, MacOS, and Windows.
+*/
+enum MouseCursor {
+  kMouseCursorArrow,       ///< Default pointing arrow
+  kMouseCursorCaret,       ///< Caret (I-Beam) for text entry
+  kMouseCursorCrosshair,   ///< Cross-hair
+  kMouseCursorHand,        ///< Hand with a pointing finger
+  kMouseCursorNotAllowed,  ///< Operation not allowed
+  kMouseCursorLeftRight,   ///< Left/right arrow for horizontal resize
+  kMouseCursorUpDown,      ///< Up/down arrow for vertical resize
+  kMouseCursorDiagonal,    ///< Top-left to bottom-right arrow for diagonal resize
+  kMouseCursorAntiDiagonal ///< Bottom-left to top-right arrow for diagonal resize
+};
+
 /**
    Scroll direction.
 

dgl/TopLevelWidget.hpp

@@ -103,6 +103,7 @@ public:
     // TODO group stuff after here, convenience functions present in Window class
     bool setClipboard(const char* mimeType, const void* data, size_t dataSize);
     const void* getClipboard(const char*& mimeType, size_t& dataSize);
+    bool setCursor(MouseCursor cursor);
     bool addIdleCallback(IdleCallback* callback, uint timerFrequencyInMs = 0);
     bool removeIdleCallback(IdleCallback* callback);
     double getScaleFactor() const noexcept;

dgl/Window.hpp

@@ -284,6 +284,15 @@ public:
     */
     const void* getClipboard(const char*& mimeType, size_t& dataSize);
 
+   /**
+      Set the mouse cursor.
+
+      This changes the system cursor that is displayed when the pointer is inside the window.
+      May fail if setting the cursor is not supported on this system,
+      for example if compiled on X11 without Xcursor support.
+    */
+    bool setCursor(MouseCursor cursor);
+
    /**
       Add a callback function to be triggered on every idle cycle or on a specific timer frequency.
       You can add more than one, and remove them at anytime with removeIdleCallback().

dgl/src/TopLevelWidget.cpp

@@ -70,6 +70,11 @@ const void* TopLevelWidget::getClipboard(const char*& mimeType, size_t& dataSize
     return pData->window.getClipboard(mimeType, dataSize);
 }
 
+bool TopLevelWidget::setCursor(const MouseCursor cursor)
+{
+    return pData->window.setCursor(cursor);
+}
+
 bool TopLevelWidget::addIdleCallback(IdleCallback* const callback, const uint timerFrequencyInMs)
 {
     return pData->window.addIdleCallback(callback, timerFrequencyInMs);

dgl/src/Window.cpp

@@ -271,6 +271,11 @@ const void* Window::getClipboard(const char*& mimeType, size_t& dataSize)
     return clipboard;
 }
 
+bool Window::setCursor(const MouseCursor cursor)
+{
+    return puglSetCursor(pData->view, static_cast<PuglCursor>(cursor)) == PUGL_SUCCESS;
+}
+
 bool Window::addIdleCallback(IdleCallback* const callback, const uint timerFrequencyInMs)
 {
     DISTRHO_SAFE_ASSERT_RETURN(callback != nullptr, false)

dgl/src/pugl-upstream

@@ -1 +1 @@
-Subproject commit f69d953d95dae70e32d37e522076fd41cec31a22
+Subproject commit d6c17abe22399acefc00fd0b78b99ea38ce27f41