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Adding peripheral layout mode. #12

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22 changes: 18 additions & 4 deletions src/ui/Layout.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -62,9 +62,15 @@ void ui::LinearLayout::layout( View *view )
} );

// Update layout based on selected mode and primary axis.
size_t index = 0;
float offset = mMargin.getUpperLeft()[axis];
float negativeOffset = containerSize[axis] - mMargin.getLowerRight()[axis];
for( auto &subview : subviews ) {
if( mMode == Mode::DISTRIBUTE ) {
if( mMode == Mode::INCREMENT ) {
updateAxisPos( subview, offset, axis );
offset += subview->getSize()[axis] + mPadding;
}
else if( mMode == Mode::DISTRIBUTE ) {
offset += ( containerSizeMinusMargins - subviewsTotal ) / float( subviews.size() + 1 );
updateAxisPos( subview, offset, axis );
offset += subview->getSize()[axis];
Expand All @@ -76,10 +82,18 @@ void ui::LinearLayout::layout( View *view )
updateAxisPos( subview, offset, axis );
offset += subview->getSize()[axis] + mPadding;
}
else {
updateAxisPos( subview, offset, axis );
offset += subview->getSize()[axis] + mPadding;
else if( mMode == Mode::PERIPHERAL ) {
if( index < glm::ceil( 0.5f * subviews.size() ) ) {
updateAxisPos( subview, offset, axis );
offset += subview->getSize()[axis] + mPadding;
}
else {
negativeOffset -= subview->getSize()[axis];
updateAxisPos( subview, negativeOffset, axis );
negativeOffset -= mPadding;
}
}
++index;
}

// Update alignment of all subviews on secondary axis.
Expand Down
1 change: 1 addition & 0 deletions src/ui/Layout.h
Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,7 @@ class LinearLayout : public Layout {
INCREMENT = 0, //! Each successive View is placed after the previous one + margin
FILL, //! Spreads and expands subviews, overriding each subview's size.
DISTRIBUTE, //! Spreads subviews equally based on their center. Ignores padding.
PERIPHERAL, //! Stacks subviews on each side.
NUM_MODES
};

Expand Down
6 changes: 3 additions & 3 deletions test/src/LayoutTests.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -54,10 +54,10 @@ void LayoutTests::addLabels( const ui::ViewRef &view, size_t count )
void LayoutTests::layout()
{
mHorizontalGroupView->setPos( vec2( 40, 40 ) );
mHorizontalGroupView->setSize( vec2( 800, 80 ) );
mHorizontalGroupView->setSize( vec2( 800, 100 ) );

mVerticalGroupView->setPos( vec2( 40, 140 ) );
mVerticalGroupView->setSize( vec2( 300, 300 ) );
mVerticalGroupView->setPos( vec2( 40, 180 ) );
mVerticalGroupView->setSize( vec2( 300, 400 ) );
}

bool LayoutTests::keyDown( ci::app::KeyEvent &event )
Expand Down