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--- addons:functions:gui:imguisizeconstraintcallbackdata [2017/04/21 22:13]
atom0s
+++ addons:functions:gui:imguisizeconstraintcallbackdata [2017/04/22 00:10]
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-====== ImGuiSizeConstraintCallbackData ======
-The ImGuiSizeConstraintCallbackData structure contains information used for window resizing callbacks. This allows users to adjust how their window(s) resize if they want to use certain constraints.
-The following data is exposed in this structure, to Lua addons:
-<code cpp>
-struct ImGuiSizeConstraintCallbackData
-{
-    ImVec2 Pos;         // The current window position, for reference. (Read Only)
-    ImVec2 CurrentSize; // The current window size, for reference. (Read Only)
-    ImVec2 DesiredSize; // The desired contraint to apply to the resizing of the window. (Based on the mouse position.)
-};
-</code>
-You should edit the DesiredSize field to constrain the window to your liking. This value takes an ImVec2 of two floats, for example:
-<code lua>
-DesiredSize = ImVec(200, 200);
-</code>
-------
-====== Example ======
-The following example would apply a sizing constraint to keep the window in a square shape. (Similar to aspect ratio resizing.)
-<code lua>
-function SquareResizeConstraint(data)
-    data.DesiredSize = ImVec2(math.max(data.DesiredSize.x, data.DesiredSize.y), math.max(data.DesiredSize.x, data.DesiredSize.y));
-end
-imgui.SetNextWindowSizeConstraints(0, 0, float_max, float_max, 'SquareResizeConstraint');
-</code>

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