Scrollbar fading and periodic commands

Added a new mechanism to issue periodic but not per-frame commands. This is used for main-thread operations like checking if it's time to fade away the scrollbars.

Scrollbars are faded away completely on Apple platforms. Adjusted list right margins accordingly.

1 files changed, 39 insertions, 0 deletions

diff --git a/src/periodic.h b/src/periodic.h
new file mode 100644
index 00000000..acb00aa2
--- /dev/null
+++ b/src/periodic.h
@@ -0,0 +1,39 @@
+/* Copyright 2021 Jaakko Keränen <jaakko.keranen@iki.fi>
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
+
+#include <the_Foundation/mutex.h>
+#include <the_Foundation/sortedarray.h>
+
+iDeclareType(Periodic)
+
+/* Animation utility. Not per frame but several times per second. */
+struct Impl_Periodic {
+    int          timer;
+    iMutex *     mutex;
+    iSortedArray commands;
+};
+
+void    init_Periodic   (iPeriodic *);
+void    deinit_Periodic (iPeriodic *);
+
+void    add_Periodic    (iPeriodic *, iAny *context, const char *command);
+void    remove_Periodic (iPeriodic *, iAny *context);