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Clipper: bunch of rework. (#3841, #1725)

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- Focused/NavId now always included in display range.
- Any number of steps (while preserving zero-alloc policy).
- Non contiguous ranges for nav processing
- Moved new fields internally (+ moved StepNo away from sight so it doesn't get missused).
- Generally tweaks/refactors.
This commit is contained in:
ocornut
2021-10-11 17:19:20 +02:00
parent cd1b5f7883
commit 93cccd27f6
4 changed files with 197 additions and 150 deletions
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36
imgui_internal.h
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@ -18,6 +18,7 @@ Index of this file:
// [SECTION] Generic helpers
// [SECTION] ImDrawList support
// [SECTION] Widgets support: flags, enums, data structures
// [SECTION] Clipper support
// [SECTION] Navigation support
// [SECTION] Columns support
// [SECTION] Multi-select support
@ -1162,6 +1163,34 @@ struct ImGuiPtrOrIndex
ImGuiPtrOrIndex(int index) { Ptr = NULL; Index = index; }
};
//-----------------------------------------------------------------------------
// [SECTION] Clipper support
//-----------------------------------------------------------------------------
struct ImGuiListClipperRange
{
int Min;
int Max;
bool PosToIndexConvert; // Begin/End are absolute position (will be converted to indices later)
ImS8 PosToIndexOffsetMin; // Add to Min after converting to indices
ImS8 PosToIndexOffsetMax; // Add to Min after converting to indices
static ImGuiListClipperRange FromIndices(int min, int max) { ImGuiListClipperRange r = { min, max, false, 0, 0 }; return r; }
static ImGuiListClipperRange FromPositions(float y1, float y2, int off_min, int off_max) { ImGuiListClipperRange r = { (int)y1, (int)y2, true, (ImS8)off_min, (ImS8)off_max }; return r; }
};
// Temporary clipper data, buffers shared/reused between instances
struct ImGuiListClipperData
{
ImGuiListClipper* ListClipper;
int StepNo;
int ItemsFrozen;
ImVector<ImGuiListClipperRange> Ranges;
ImGuiListClipperData() { memset(this, 0, sizeof(*this)); }
void Reset(ImGuiListClipper* clipper) { ListClipper = clipper; StepNo = ItemsFrozen = 0; Ranges.resize(0); }
};
//-----------------------------------------------------------------------------
// [SECTION] Navigation support
//-----------------------------------------------------------------------------
@ -1583,6 +1612,7 @@ struct ImGuiContext
ImGuiDir NavMoveDirForDebug;
ImGuiDir NavMoveClipDir; // FIXME-NAV: Describe the purpose of this better. Might want to rename?
ImRect NavScoringRect; // Rectangle used for scoring, in screen space. Based of window->NavRectRel[], modified for directional navigation scoring.
ImRect NavScoringNoClipRect; // Some nav operations (such as PageUp/PageDown) enforce a region which clipper will attempt to always keep submitted
int NavScoringDebugCount; // Metrics for debugging
int NavTabbingInputableRemaining; // >0 when counting items for tabbing
ImGuiNavItemData NavMoveResultLocal; // Best move request candidate within NavWindow
@ -1627,6 +1657,10 @@ struct ImGuiContext
ImVector<unsigned char> DragDropPayloadBufHeap; // We don't expose the ImVector<> directly, ImGuiPayload only holds pointer+size
unsigned char DragDropPayloadBufLocal[16]; // Local buffer for small payloads
// Clipper
int ClipperTempDataStacked;
ImVector<ImGuiListClipperData> ClipperTempData;
// Table
ImGuiTable* CurrentTable;
int TablesTempDataStacked; // Temporary table data size (because we leave previous instances undestructed, we generally don't use TablesTempData.Size)
@ -1814,6 +1848,8 @@ struct ImGuiContext
DragDropHoldJustPressedId = 0;
memset(DragDropPayloadBufLocal, 0, sizeof(DragDropPayloadBufLocal));
ClipperTempDataStacked = 0;
CurrentTable = NULL;
TablesTempDataStacked = 0;
CurrentTabBar = NULL;