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Columns: Caching columns clipping rectangles (#125)

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This commit is contained in:
omar 2017-08-20 23:17:59 +08:00
parent adeaf1cd72
commit 067127f113
2 changed files with 15 additions and 6 deletions
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20
imgui.cpp
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@ -8607,7 +8607,7 @@ bool ImGui::Selectable(const char* label, bool selected, ImGuiSelectableFlags fl
ImGuiContext& g = *GImGui;
const ImGuiStyle& style = g.Style;
if ((flags & ImGuiSelectableFlags_SpanAllColumns) && window->DC.ColumnsCount > 1)
if ((flags & ImGuiSelectableFlags_SpanAllColumns) && window->DC.ColumnsCount > 1) // FIXME-OPT: Avoid if vertically clipped.
PopClipRect();
ImGuiID id = window->GetID(label);
@ -10021,13 +10021,11 @@ void ImGui::SetColumnWidth(int column_index, float width)
void ImGui::PushColumnClipRect(int column_index)
{
ImGuiWindow* window = ImGui::GetCurrentWindow();
ImGuiWindow* window = GetCurrentWindowRead();
if (column_index < 0)
column_index = window->DC.ColumnsCurrent;
float x1 = ImFloor(0.5f + window->Pos.x + ImGui::GetColumnOffset(column_index) - 1.0f);
float x2 = ImFloor(0.5f + window->Pos.x + ImGui::GetColumnOffset(column_index+1) - 1.0f);
ImGui::PushClipRect(ImVec2(x1,-FLT_MAX), ImVec2(x2,+FLT_MAX), true);
PushClipRect(window->DC.ColumnsData[column_index].ClipRect.Min, window->DC.ColumnsData[column_index].ClipRect.Max, false);
}
void ImGui::BeginColumns(const char* id, int columns_count, ImGuiColumnsFlags flags)
@ -10066,11 +10064,21 @@ void ImGui::BeginColumns(const char* id, int columns_count, ImGuiColumnsFlags fl
const ImGuiID column_id = window->DC.ColumnsSetId + ImGuiID(column_index);
KeepAliveID(column_id);
const float default_t = column_index / (float)window->DC.ColumnsCount;
float t = window->DC.StateStorage->GetFloat(column_id, default_t); // Cheaply store our floating point value inside the integer (could store a union into the map?)
float t = window->DC.StateStorage->GetFloat(column_id, default_t);
if (!(window->DC.ColumnsFlags & ImGuiColumnsFlags_NoForceWithinWindow))
t = ImMin(t, PixelsToOffsetNorm(window, window->DC.ColumnsMaxX - g.Style.ColumnsMinSpacing * (window->DC.ColumnsCount - column_index)));
window->DC.ColumnsData[column_index].OffsetNorm = t;
}
// Cache clipping rectangles
for (int column_index = 0; column_index < columns_count; column_index++)
{
float clip_x1 = ImFloor(0.5f + window->Pos.x + GetColumnOffset(column_index) - 1.0f);
float clip_x2 = ImFloor(0.5f + window->Pos.x + GetColumnOffset(column_index + 1) - 1.0f);
window->DC.ColumnsData[column_index].ClipRect = ImRect(clip_x1, -FLT_MAX, clip_x2, +FLT_MAX);
window->DC.ColumnsData[column_index].ClipRect.Clip(window->ClipRect);
}
window->DrawList->ChannelsSplit(window->DC.ColumnsCount);
PushColumnClipRect();
PushItemWidth(GetColumnWidth() * 0.65f);

1
imgui_internal.h
View File

@ -316,6 +316,7 @@ struct ImGuiGroupData
struct ImGuiColumnData
{
float OffsetNorm; // Column start offset, normalized 0.0 (far left) -> 1.0 (far right)
ImRect ClipRect;
//float IndentX;
};