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PixelPaint: Add lasso selection tool

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Lasso selection works by allowing the user to draw an arbitrary shape
much like the pen tool and ensuring the shape is closed by connecting
the start/end points when the user is done drawing. Everything inside
the shape becomes the selection.

Selection is determined via an outer flood fill. We begin a flood fill
from a point that is guaranteed to be outside of the drawn shape, and
anything the fill doesn't touch is determined to be the selection
region.
This commit is contained in:
Timothy Slater 2022-09-07 07:46:16 -05:00 • committed by Andreas Kling
parent dc5402f61e
commit 3d542b0c38
5 changed files with 281 additions and 0 deletions
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2
Userland/Applications/PixelPaint/ToolboxWidget.cpp
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@ -12,6 +12,7 @@
#include "Tools/EllipseTool.h"
#include "Tools/EraseTool.h"
#include "Tools/GuideTool.h"
#include "Tools/LassoSelectTool.h"
#include "Tools/LineTool.h"
#include "Tools/MoveTool.h"
#include "Tools/PenTool.h"
@ -85,6 +86,7 @@ void ToolboxWidget::setup_tools()
add_tool("rectangle-select"sv, { 0, Key_R }, make<RectangleSelectTool>());
add_tool("wand-select"sv, { 0, Key_W }, make<WandSelectTool>());
add_tool("polygonal-select"sv, { Mod_Shift, Key_P }, make<PolygonalSelectTool>());
add_tool("lasso-select"sv, { 0, Key_L }, make<LassoSelectTool>());
add_tool("guides"sv, { 0, Key_G }, make<GuideTool>());
add_tool("clone"sv, { 0, Key_C }, make<CloneTool>());
}