blender::ui::BuildOnlyVisibleButtonsHelper Class Reference

Public Member Functions
	BuildOnlyVisibleButtonsHelper (const View2D &v2d, const AbstractGridView &grid_view, int cols_per_row)
bool	is_item_visible (int item_idx) const
void	fill_layout_before_visible (uiBlock &block) const
void	fill_layout_after_visible (uiBlock &block) const

Detailed Description

Helper for only adding layout items for grid items that are actually in view. 3 main functions:

• is_item_visible(): Query if an item of a given index is visible in the view (others should be skipped when building the layout).
• fill_layout_before_visible(): Add empty space to the layout before a visible row is drawn, so the layout height is the same as if all items were added (important to get the correct scroll height).
• fill_layout_after_visible(): Same thing, just adds empty space for after the last visible row.

Does two assumptions:

• Top-to-bottom flow (ymax = 0 and ymin < 0). If that's not good enough, View2D should probably provide queries for the scroll offset.
• Only vertical scrolling. For horizontal scrolling, spacers would have to be added on the side(s) as well.

Definition at line 203 of file grid_view.cc.

Constructor & Destructor Documentation

BuildOnlyVisibleButtonsHelper()

blender::ui::BuildOnlyVisibleButtonsHelper::BuildOnlyVisibleButtonsHelper	(	const View2D &	v2d,
		const AbstractGridView &	grid_view,
		int	cols_per_row
	)

Definition at line 225 of file grid_view.cc.

Member Function Documentation

fill_layout_after_visible()

void blender::ui::BuildOnlyVisibleButtonsHelper::fill_layout_after_visible

(

uiBlock &

block

)

const

Definition at line 270 of file grid_view.cc.

References blender::ui::AbstractGridView::get_item_count(), and blender::IndexRange::last().

Referenced by blender::ui::GridViewLayoutBuilder::build_from_view().

fill_layout_before_visible()

void blender::ui::BuildOnlyVisibleButtonsHelper::fill_layout_before_visible

(

uiBlock &

block

)

const

Definition at line 258 of file grid_view.cc.

References blender::math::abs(), View2D::cur, IS_EQF, blender::ui::GridViewStyle::tile_height, View2D::tot, and rctf::ymax.

Referenced by blender::ui::GridViewLayoutBuilder::build_from_view().

is_item_visible()

bool blender::ui::BuildOnlyVisibleButtonsHelper::is_item_visible

(

int

item_idx

)

const

Definition at line 253 of file grid_view.cc.

References blender::IndexRange::contains().

Referenced by blender::ui::GridViewLayoutBuilder::build_from_view().

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The documentation for this class was generated from the following file:

• grid_view.cc