Add inset and spacing to BALMLayout. Each Area is able to overwrite this global values and use his own inset. Add spacing and inset to the tests.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38792 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/libs/alm/ALMLayout.h

@@ -28,7 +28,7 @@ namespace BALM {
  */
 class BALMLayout : public BAbstractLayout {
 public:
-								BALMLayout();
+								BALMLayout(float spacing = 0.0f);
 	virtual						~BALMLayout();
 
 			XTab*				AddXTab();
@@ -65,6 +65,12 @@ public:
 
 			LinearSpec*			Solver();
 
+			void				SetInset(float inset);
+			float				Inset();
+
+			void				SetSpacing(float spacing);
+			float				Spacing();
+
 private:
 			void				_SolveLayout();
 
@@ -86,6 +92,9 @@ private:
 			BSize				fMaxSize;
 			BSize				fPreferredSize;
 			char*				fPerformancePath;
+
+			float				fInset;
+			float				fSpacing;
 };
 
 }	// namespace BALM

headers/libs/alm/Area.h

@@ -93,6 +93,7 @@ private:
 
 private:
 			BLayoutItem*		fLayoutItem;
+
 			LinearSpec*			fLS;
 
 			XTab*				fLeft;
@@ -106,10 +107,8 @@ private:
 			BSize				fShrinkPenalties;
 			BSize				fGrowPenalties;
 
-			int32				fLeftInset;
-			int32				fTopInset;
-			int32				fRightInset;
-			int32				fBottomInset;
+			BSize				fTopLeftInset;
+			BSize				fRightBottomInset;
 
 			BList				fConstraints;
 			Constraint*			fMinContentWidth;

src/libs/alm/ALMLayout.cpp

@@ -28,9 +28,10 @@ const BSize kMaxSize(B_SIZE_UNLIMITED, B_SIZE_UNLIMITED);
  * Constructor.
  * Creates new layout engine.
  */
-BALMLayout::BALMLayout()
+BALMLayout::BALMLayout(float spacing)
 	:
-	BAbstractLayout()
+	fInset(0.0f),
+	fSpacing(spacing)
 {
 	fLeft = new XTab(&fSolver);
 	fRight = new XTab(&fSolver);
@@ -389,6 +390,34 @@ BALMLayout::Solver()
 }
 
 
+void
+BALMLayout::SetInset(float inset)
+{
+	fInset = inset;
+}
+
+
+float
+BALMLayout::Inset()
+{
+	return fInset;
+}
+
+
+void
+BALMLayout::SetSpacing(float spacing)
+{
+	fSpacing = spacing;
+}
+
+
+float
+BALMLayout::Spacing()
+{
+	return fSpacing;
+}
+
+
 void
 BALMLayout::_SolveLayout()
 {

src/libs/alm/Area.cpp

@@ -305,7 +305,13 @@ Area::SetContentAspectRatio(double ratio)
 int32
 Area::LeftInset() const
 {
-	return fLeftInset;
+	if (fTopLeftInset.IsWidthSet())
+		return fTopLeftInset.Width();
+
+	BALMLayout* layout = static_cast<BALMLayout*>(fLayoutItem->Layout());
+	if (fLeft == layout->Left())
+		return layout->Inset();
+	return layout->Spacing() / 2;
 }
 
 
@@ -315,7 +321,13 @@ Area::LeftInset() const
 int32
 Area::TopInset() const
 {
-	return fTopInset;
+	if (fTopLeftInset.IsHeightSet())
+		return fTopLeftInset.Height();
+
+	BALMLayout* layout = static_cast<BALMLayout*>(fLayoutItem->Layout());
+	if (fTop == layout->Top())
+		return layout->Inset();
+	return layout->Spacing() / 2;
 }
 
 
@@ -325,7 +337,13 @@ Area::TopInset() const
 int32
 Area::RightInset() const
 {
-	return fRightInset;
+	if (fRightBottomInset.IsWidthSet())
+		return fRightBottomInset.Width();
+
+	BALMLayout* layout = static_cast<BALMLayout*>(fLayoutItem->Layout());
+	if (fRight == layout->Right())
+		return layout->Inset();
+	return layout->Spacing() / 2;
 }
 
 
@@ -335,7 +353,13 @@ Area::RightInset() const
 int32
 Area::BottomInset() const
 {
-	return fBottomInset;
+	if (fRightBottomInset.IsHeightSet())
+		return fRightBottomInset.Height();
+
+	BALMLayout* layout = static_cast<BALMLayout*>(fLayoutItem->Layout());
+	if (fBottom == layout->Bottom())
+		return layout->Inset();
+	return layout->Spacing() / 2;
 }
 
 
@@ -345,7 +369,7 @@ Area::BottomInset() const
 void
 Area::SetLeftInset(int32 left)
 {
-	fLeftInset = left;
+	fTopLeftInset.width = left;
 	fLayoutItem->Layout()->InvalidateLayout();
 }
 
@@ -356,7 +380,7 @@ Area::SetLeftInset(int32 left)
 void
 Area::SetTopInset(int32 top)
 {
-	fTopInset = top;
+	fTopLeftInset.height = top;
 	fLayoutItem->Layout()->InvalidateLayout();
 }
 
@@ -367,7 +391,8 @@ Area::SetTopInset(int32 top)
 void
 Area::SetRightInset(int32 right)
 {
-	fRightInset = right;
+	fRightBottomInset.width = right;
+	fLayoutItem->Layout()->InvalidateLayout();
 }
 
 
@@ -377,7 +402,8 @@ Area::SetRightInset(int32 right)
 void
 Area::SetBottomInset(int32 bottom)
 {
-	fBottomInset = bottom;
+	fRightBottomInset.height = bottom;
+	fLayoutItem->Layout()->InvalidateLayout();
 }
 
 
@@ -532,11 +558,6 @@ Area::_Init(LinearSpec* ls, XTab* left, YTab* top, XTab* right, YTab* bottom,
 
 	fAutoPreferredContentSize = false;
 
-	fLeftInset = 0;
-	fTopInset = 0;
-	fRightInset = 0;
-	fBottomInset = 0;
-
 	fLS = ls;
 	fLeft = left;
 	fRight = right;
@@ -578,10 +599,10 @@ Area::_DoLayout()
 
 	BRect areaFrame(round(fLeft->Value()), round(fTop->Value()),
 		round(fRight->Value()), round(fBottom->Value()));
-	areaFrame.left += fLeftInset;
-	areaFrame.right -= fRightInset;
-	areaFrame.top += fTopInset;
-	areaFrame.bottom -= fBottomInset;
+	areaFrame.left += LeftInset();
+	areaFrame.right -= RightInset();
+	areaFrame.top += TopInset();
+	areaFrame.bottom -= BottomInset();
 
 	fLayoutItem->AlignInFrame(areaFrame);
 }
@@ -590,16 +611,16 @@ Area::_DoLayout()
 void
 Area::_UpdateMinSizeConstraint(BSize min)
 {
-	fMinContentWidth->SetRightSide(min.Width() + fLeftInset + fRightInset);
-	fMinContentHeight->SetRightSide(min.Height() + fTopInset + fBottomInset);
+	fMinContentWidth->SetRightSide(min.Width() + LeftInset() + RightInset());
+	fMinContentHeight->SetRightSide(min.Height() + TopInset() + BottomInset());
 }
 
 
 void
 Area::_UpdateMaxSizeConstraint(BSize max)
 {
-	max.width += fLeftInset + fRightInset;
-	max.height += fTopInset + fBottomInset;
+	max.width += LeftInset() + RightInset();
+	max.height += TopInset() + BottomInset();
 
 	// we only need max constraints if the alignment is full height/width
 	// otherwise we can just align the item in the free space
@@ -643,8 +664,8 @@ Area::_UpdateMaxSizeConstraint(BSize max)
 void
 Area::_UpdatePreferredConstraint(BSize preferred)
 {
-	preferred.width += fLeftInset + fRightInset;
-	preferred.height += fTopInset + fBottomInset;
+	preferred.width += LeftInset() + RightInset();
+	preferred.height += TopInset() + BottomInset();
 	if (fPreferredContentWidth == NULL) {
 		fPreferredContentWidth = fLS->AddConstraint(-1.0, fLeft, 1.0,
 			fRight, OperatorType(EQ), preferred.Width(),

src/tests/libs/alm/Areas.cpp

@@ -21,7 +21,7 @@ public:
 		button1->SetExplicitMaxSize(BSize(B_SIZE_UNLIMITED, B_SIZE_UNLIMITED));
 
 		// create a new BALMLayout and use  it for this window
-		BALMLayout* layout = new BALMLayout();
+		BALMLayout* layout = new BALMLayout(6);
 		SetLayout(layout);
 
 		// create extra tabs

src/tests/libs/alm/Pinwheel.cpp

@@ -38,9 +38,11 @@ public:
 		button4->SetExplicitMaxSize(BSize(B_SIZE_UNLIMITED, B_SIZE_UNLIMITED));
 
 		// create a new BALMLayout and use  it for this window
-		BALMLayout* layout = new BALMLayout();
+		BALMLayout* layout = new BALMLayout(10.);
 		SetLayout(layout);
 
+		layout->SetInset(5.);
+
 		// create extra tabs
 		XTab* x1 = layout->AddXTab();
 		XTab* x2 = layout->AddXTab();