libcore|RuleRectangle: Added convenience method for defining mid X/Y …

…rules
skyjake · Oct 29, 2014 · 66d5954 · 66d5954
1 parent caf12fe
commit 66d5954
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diff --git a/doomsday/libcore/include/de/widgets/rulerectangle.h b/doomsday/libcore/include/de/widgets/rulerectangle.h
@@ -71,6 +71,16 @@ class DENG2_PUBLIC RuleRectangle
 
     RuleRectangle &setSize(Rule const &width, Rule const &height);
 
+    RuleRectangle &setMidAnchorX(Rule const &middle);
+
+    /**
+     * Sets the AnchorY rule to @a middle and Y anchor point to 0.5. This is
+     * equivalent to first calling setInput() and then setAnchorPoint().
+     *
+     * @param middle  Rule for the Y anchor.
+     */
+    RuleRectangle &setMidAnchorY(Rule const &middle);
+
     /**
      * Sets the outputs of another rule rectangle as the inputs of this one.
      *

diff --git a/doomsday/libcore/src/widgets/rulerectangle.cpp b/doomsday/libcore/src/widgets/rulerectangle.cpp
@@ -310,6 +310,20 @@ RuleRectangle &RuleRectangle::setSize(Rule const &width, Rule const &height)
     return *this;
 }
 
+RuleRectangle &RuleRectangle::setMidAnchorX(Rule const &middle)
+{
+    setInput(Rule::AnchorX, middle);
+    d->normalizedAnchorX->set(.5f);
+    return *this;
+}
+
+RuleRectangle &RuleRectangle::setMidAnchorY(Rule const &middle)
+{
+    setInput(Rule::AnchorY, middle);
+    d->normalizedAnchorY->set(.5f);
+    return *this;
+}
+
 RuleRectangle &RuleRectangle::clearInput(Rule::Semantic inputRule)
 {
     d->clearInputRule(inputRule);