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Perform simple check: error if Docking or Viewport are enabled _exactly_ on frame 1 (instead of frame 0 or later), which is a common error leading to loss of .ini data. (#2109)

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omar 2019-07-21 12:05:04 -07:00
parent 9f35ba8546
commit 47f5ad32b7
1 changed files with 7 additions and 0 deletions
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7
imgui.cpp
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@ -3782,6 +3782,13 @@ void ImGui::NewFrame()
if (g.IO.ConfigWindowsResizeFromEdges && !(g.IO.BackendFlags & ImGuiBackendFlags_HasMouseCursors))
g.IO.ConfigWindowsResizeFromEdges = false;
// Perform simple check: error if Docking or Viewport are enabled _exactly_ on frame 1 (instead of frame 0 or later), which is a common error leading to loss of .ini data.
const ImGuiColumnsFlags prev_config_flags = g.ConfigFlagsForFrame;
if (g.FrameCount == 1 && (g.IO.ConfigFlags & ImGuiConfigFlags_DockingEnable) && (prev_config_flags & ImGuiConfigFlags_DockingEnable) == 0)
IM_ASSERT(0 && "Please DockingEnable before the first call to NewFrame()! Otherwise you will lose your .ini settings!");
if (g.FrameCount == 1 && (g.IO.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) && (prev_config_flags & ImGuiConfigFlags_ViewportsEnable) == 0)
IM_ASSERT(0 && "Please ViewportEnable before the first call to NewFrame()! Otherwise you will lose your .ini settings!");
// Perform simple checks: multi-viewport and platform windows support
if (g.IO.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
{