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Tables: Tidying up TableDrawMergeChannels() with a struct. (3058)

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This commit is contained in:
ocornut 2020-03-13 16:16:20 +01:00
parent 7277ab6530
commit d37cef40f2
1 changed files with 19 additions and 14 deletions
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33
imgui_tables.cpp
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@ -1248,13 +1248,16 @@ void ImGui::TableDrawMergeChannels(ImGuiTable* table)
const bool is_frozen_v = (table->FreezeRowsCount > 0); const bool is_frozen_v = (table->FreezeRowsCount > 0);
const bool is_frozen_h = (table->FreezeColumnsCount > 0); const bool is_frozen_h = (table->FreezeColumnsCount > 0);
// Track which groups (1-4) we are going to attempt to merge, and which channels goes into each group. // Track which groups we are going to attempt to merge, and which channels goes into each group.
struct MergeGroup
{
ImRect ClipRect;
ImU64 ChannelsMask;
int ChannelsCount;
};
int merge_group_mask = 0x00; int merge_group_mask = 0x00;
int merge_group_channels_count[4] = { 0 }; MergeGroup merge_groups[4];
ImU64 merge_group_channels_mask[4] = { 0 }; memset(merge_groups, 0, sizeof(merge_groups));
ImRect merge_group_clip_rect[4];
for (int n = 0; n < IM_ARRAYSIZE(merge_group_clip_rect); n++)
merge_group_clip_rect[n] = ImVec4(+FLT_MAX, +FLT_MAX, -FLT_MAX, -FLT_MAX);
bool merge_groups_all_fit_within_inner_rect = (table->Flags & ImGuiTableFlags_NoHostExtendY) == 0; bool merge_groups_all_fit_within_inner_rect = (table->Flags & ImGuiTableFlags_NoHostExtendY) == 0;
// 1. Scan channels and take note of those which can be merged // 1. Scan channels and take note of those which can be merged
@ -1288,12 +1291,15 @@ void ImGui::TableDrawMergeChannels(ImGuiTable* table)
if (width_contents > column->WidthGiven && !(column->Flags & ImGuiTableColumnFlags_NoClipX)) if (width_contents > column->WidthGiven && !(column->Flags & ImGuiTableColumnFlags_NoClipX))
continue; continue;
const int dst_merge_group_idx = (is_frozen_h && column_n < table->FreezeColumnsCount ? 0 : 2) + (is_frozen_v ? merge_group_sub_n : 1); const int merge_group_dst_n = (is_frozen_h && column_n < table->FreezeColumnsCount ? 0 : 2) + (is_frozen_v ? merge_group_sub_n : 1);
IM_ASSERT(channel_no < 64); IM_ASSERT(channel_no < 64);
merge_group_mask |= (1 << dst_merge_group_idx); MergeGroup* merge_group = &merge_groups[merge_group_dst_n];
merge_group_channels_mask[dst_merge_group_idx] |= (ImU64)1 << channel_no; if (merge_group->ChannelsCount == 0)
merge_group_channels_count[dst_merge_group_idx]++; merge_group->ClipRect = ImRect(+FLT_MAX, +FLT_MAX, -FLT_MAX, -FLT_MAX);
merge_group_clip_rect[dst_merge_group_idx].Add(src_channel->_CmdBuffer[0].ClipRect); merge_group->ChannelsMask |= (ImU64)1 << channel_no;
merge_group->ChannelsCount++;
merge_group->ClipRect.Add(src_channel->_CmdBuffer[0].ClipRect);
merge_group_mask |= (1 << merge_group_dst_n);
// If we end with a single group and hosted by the outer window, we'll attempt to merge our draw command with // If we end with a single group and hosted by the outer window, we'll attempt to merge our draw command with
// the existing outer window command. But we can only do so if our columns all fit within the expected clip rect, // the existing outer window command. But we can only do so if our columns all fit within the expected clip rect,
@ -1313,7 +1319,6 @@ void ImGui::TableDrawMergeChannels(ImGuiTable* table)
column->DrawChannelCurrent = -1; column->DrawChannelCurrent = -1;
} }
// 2. Rewrite channel list in our preferred order // 2. Rewrite channel list in our preferred order
if (merge_group_mask != 0) if (merge_group_mask != 0)
{ {
@ -1324,9 +1329,9 @@ void ImGui::TableDrawMergeChannels(ImGuiTable* table)
remaining_mask &= (ImU64)~1; // Background channel 0 not part of the merge (see channel allocation in TableUpdateDrawChannels) remaining_mask &= (ImU64)~1; // Background channel 0 not part of the merge (see channel allocation in TableUpdateDrawChannels)
const bool may_extend_clip_rect_to_host_rect = ImIsPowerOfTwo(merge_group_mask); const bool may_extend_clip_rect_to_host_rect = ImIsPowerOfTwo(merge_group_mask);
for (int merge_group_n = 0; merge_group_n < 4; merge_group_n++) for (int merge_group_n = 0; merge_group_n < 4; merge_group_n++)
if (ImU64 merge_channels_mask = merge_group_channels_mask[merge_group_n]) if (ImU64 merge_channels_mask = merge_groups[merge_group_n].ChannelsMask)
{ {
ImRect merge_clip_rect = merge_group_clip_rect[merge_group_n]; ImRect merge_clip_rect = merge_groups[merge_group_n].ClipRect;
if (may_extend_clip_rect_to_host_rect) if (may_extend_clip_rect_to_host_rect)
{ {
//GetOverlayDrawList()->AddRect(table->HostClipRect.Min, table->HostClipRect.Max, IM_COL32(255, 0, 0, 200), 0.0f, ~0, 3.0f); //GetOverlayDrawList()->AddRect(table->HostClipRect.Min, table->HostClipRect.Max, IM_COL32(255, 0, 0, 200), 0.0f, ~0, 3.0f);