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Docking: fix undocking from tab-bar by moving mouse horizontally, amend 3ed07a8 + d705192.

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Automation system may drag e.g. right-most tab far left (and vice-versa) and one frame and our current logic would fail at it.
This commit is contained in:
ocornut 2021-03-30 19:01:37 +02:00
parent 3ed07a8f0b
commit 9251eac585
1 changed files with 4 additions and 1 deletions
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5
imgui_widgets.cpp
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@ -7920,17 +7920,20 @@ bool ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
else if (held && !tab_appearing && IsMouseDragging(0))
{
// Drag and drop: re-order tabs
int drag_dir = 0;
float drag_distance_from_edge_x = 0.0f;
if (!g.DragDropActive && ((tab_bar->Flags & ImGuiTabBarFlags_Reorderable) || (docked_window != NULL)))
{
// While moving a tab it will jump on the other side of the mouse, so we also test for MouseDelta.x
if (g.IO.MouseDelta.x < 0.0f && g.IO.MousePos.x < bb.Min.x)
{
drag_dir = -1;
drag_distance_from_edge_x = bb.Min.x - g.IO.MousePos.x;
TabBarQueueReorderFromMousePos(tab_bar, tab, g.IO.MousePos);
}
else if (g.IO.MouseDelta.x > 0.0f && g.IO.MousePos.x > bb.Max.x)
{
drag_dir = +1;
drag_distance_from_edge_x = g.IO.MousePos.x - bb.Max.x;
TabBarQueueReorderFromMousePos(tab_bar, tab, g.IO.MousePos);
}
@ -7952,7 +7955,7 @@ bool ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
if (distance_from_edge_y >= threshold_y)
undocking_tab = true;
if (drag_distance_from_edge_x > threshold_x)
if ((tab_bar->GetTabOrder(tab) == 0) || (tab_bar->GetTabOrder(tab) == tab_bar->Tabs.Size - 1))
if ((drag_dir < 0 && tab_bar->GetTabOrder(tab) == 0) || (drag_dir > 0 && tab_bar->GetTabOrder(tab) == tab_bar->Tabs.Size - 1))
undocking_tab = true;
}