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Docking: fix gap in hit test hold when using ImGuiDockNodeFlags_PassthruCentralNode touching the edge of a viewport. (#3733)

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This commit is contained in:
ocornut 2021-02-02 15:14:37 +01:00
parent 84e8802891
commit 22d9a61b33
1 changed files with 15 additions and 7 deletions
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22
imgui.cpp
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@ -13369,7 +13369,7 @@ static void ImGui::DockNodeUpdate(ImGuiDockNode* node)
}
// Register a hit-test hole in the window unless we are currently dragging a window that is compatible with our dockspace
const ImGuiDockNode* central_node = node->CentralNode;
ImGuiDockNode* central_node = node->CentralNode;
const bool central_node_hole = node->IsRootNode() && host_window && (node_flags & ImGuiDockNodeFlags_PassthruCentralNode) != 0 && central_node != NULL && central_node->IsEmpty();
bool central_node_hole_register_hit_test_hole = central_node_hole;
if (central_node_hole)
@ -13378,14 +13378,22 @@ static void ImGui::DockNodeUpdate(ImGuiDockNode* node)
central_node_hole_register_hit_test_hole = false;
if (central_node_hole_register_hit_test_hole)
{
// Add a little padding to match the "resize from edges" behavior and allow grabbing the splitter easily.
// We add a little padding to match the "resize from edges" behavior and allow grabbing the splitter easily.
// (But we only add it if there's something else on the other side of the hole, otherwise for e.g. fullscreen
// covering passthru node we'd have a gap on the edge not covered by the hole)
IM_ASSERT(node->IsDockSpace()); // We cannot pass this flag without the DockSpace() api. Testing this because we also setup the hole in host_window->ParentNode
ImRect central_hole(central_node->Pos, central_node->Pos + central_node->Size);
central_hole.Expand(ImVec2(-WINDOWS_RESIZE_FROM_EDGES_HALF_THICKNESS, -WINDOWS_RESIZE_FROM_EDGES_HALF_THICKNESS));
if (central_node_hole && !central_hole.IsInverted())
ImGuiDockNode* root_node = DockNodeGetRootNode(central_node);
ImRect root_rect(root_node->Pos, root_node->Pos + root_node->Size);
ImRect hole_rect(central_node->Pos, central_node->Pos + central_node->Size);
if (hole_rect.Min.x > root_rect.Min.x) { hole_rect.Min.x += WINDOWS_RESIZE_FROM_EDGES_HALF_THICKNESS; }
if (hole_rect.Max.x < root_rect.Max.x) { hole_rect.Max.x -= WINDOWS_RESIZE_FROM_EDGES_HALF_THICKNESS; }
if (hole_rect.Min.y > root_rect.Min.y) { hole_rect.Min.y += WINDOWS_RESIZE_FROM_EDGES_HALF_THICKNESS; }
if (hole_rect.Max.y < root_rect.Max.y) { hole_rect.Max.y -= WINDOWS_RESIZE_FROM_EDGES_HALF_THICKNESS; }
//GetForegroundDrawList()->AddRect(hole_rect.Min, hole_rect.Max, IM_COL32(255, 0, 0, 255));
if (central_node_hole && !hole_rect.IsInverted())
{
SetWindowHitTestHole(host_window, central_hole.Min, central_hole.Max - central_hole.Min);
SetWindowHitTestHole(host_window->ParentWindow, central_hole.Min, central_hole.Max - central_hole.Min);
SetWindowHitTestHole(host_window, hole_rect.Min, hole_rect.Max - hole_rect.Min);
SetWindowHitTestHole(host_window->ParentWindow, hole_rect.Min, hole_rect.Max - hole_rect.Min);
}
}