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BeginChild(): added ImGuiChildFlags_AutoResizeX, ImGuiChildFlags_AutoResizeY, ImGuiChildFlags_AlwaysAutoResize + support for SetNextWindowSizeConstraints(). (#1666, #1395, #1496, #1710) + Demo

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Note that child don't report ideal content size to parent so nesting may be difficult.
Note 4e4042b simplified SkipItems logic.
Note e2035a5 standardizing WindowMinSize application on child
This commit is contained in:
ocornut
2023-10-17 17:39:56 +02:00
parent 44345c2108
commit 0d3b468cb3
4 changed files with 79 additions and 14 deletions
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16
docs/CHANGELOG.txt
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@@ -94,6 +94,21 @@ Other changes:
child windows from the bottom/right border (toward layout direction). Resized child windows
settings are saved and persistent in .ini file. (#1710)
- BeginChild(): Added ImGuiChildFlags_Border as a replacement for 'bool border = true' parameter.
- BeginChild(): Added ImGuiChildFlags_AutoResizeX and ImGuiChildFlags_AutoResizeY to auto-resize
on one axis, while generally providing a size on the other axis. (#1666, #1395, #1496, #1710)
e.g. BeginChild("name", {-FLT_MIN, 0.0f}, ImGuiChildFlags_AutoResizeY);
- Size is only reevaluated if the child window is within visible boundaries or just appearing.
This allows coarse clipping to be performed and auto-resizing childs to return false when
hidden because of being scrolled out.
- Combining this with also specifying ImGuiChildFlags_AlwaysAutoResize disables
this optimization, meaning child contents will never be clipped (not recommended).
- Please be considerate that child are full windows and carry significiant overhead:
combining auto-resizing for both axises to create a non-scrolling child to merely draw
a border would be better more optimally using BeginGroup().
(until we come up with new helpers for framed groups and work-rect adjustments).
- BeginChild(): made it possible to use SetNextWindowSizeConstraints() rectangle, often
useful when ImGuiChildFlags_AutoResizeX or ImGuiChildFlags_AutoResizeY. (#1666, #1395, #1496)
Custom constraint callback are not supported with child window.
- BeginChild(): Added ImGuiChildFlags_FrameStyle as a replacement for BeginChildFrame(),
use it to make child window use FrameBg, FrameRounding, FrameBorderSize, FramePadding
instead of ChildBg, ChildRounding, ChildBorderSize, WindowPadding.
@@ -192,6 +207,7 @@ Other changes:
- ImVector: Added find_index() helper.
- Demo: Added "Drag and Drop -> Tooltip at target location" demo.
- Demo: Added "Layout -> Child Windows -> Manual-resize" demo. (#1710)
- Demo: Added "Layout -> Child Windows -> Auto-resize with constraints" demo. (#1666, #1395, #1496, #1710)
- Backends: GLFW: Clear emscripten's MouseWheel callback before shutdown. (#6790, #6096, #4019) [@halx99]
- Backends: GLFW: Added support for F13 to F24 function keys. (#6891)
- Backends: SDL2, SDL3: Added support for F13 to F24 function keys, AppBack, AppForward. (#6891)