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Selectable: add support for specifying text alignment on selectables (#2347)

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Adds a style variable to Selectable that allows clients to specify the
text alignment within Selectables, adds a section in the demo to
demonstrate selectable text alignment, and a pair of sliders in the
style editor to change selectable alignment on the fly.

In terms of implementation, this one is extremely simple: Selectable was
already calling an API that supports text alignment, but had hard-coded
it to top-left. This changes that to just pass the style variable
straight through to RenderTextClipped. Backwards-compatibility is
preserved by defaulting the text_align parameter to (0, 0), i.e.,
top-left.

This also fixes a bug with selectable text rendering that caused
right-aligned text in a selectable to be clipped incorrectly, because
the wrong clipping rectangle was being used.
This commit is contained in:
haldean
2019-02-13 14:56:21 -08:00
committed by omar
parent 93d1179805
commit b277cfffc8
4 changed files with 47 additions and 23 deletions
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46
imgui.cpp
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@ -1109,6 +1109,7 @@ ImGuiStyle::ImGuiStyle()
AntiAliasedLines = true; // Enable anti-aliasing on lines/borders. Disable if you are really short on CPU/GPU.
AntiAliasedFill = true; // Enable anti-aliasing on filled shapes (rounded rectangles, circles, etc.)
CurveTessellationTol = 1.25f; // Tessellation tolerance when using PathBezierCurveTo() without a specific number of segments. Decrease for highly tessellated curves (higher quality, more polygons), increase to reduce quality.
SelectableTextAlign = ImVec2(0,0); // Alignment of selectable text when button is larger than text.
// Default theme
ImGui::StyleColorsDark(this);
@ -5794,28 +5795,29 @@ struct ImGuiStyleVarInfo
static const ImGuiStyleVarInfo GStyleVarInfo[] =
{
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, Alpha) }, // ImGuiStyleVar_Alpha
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, WindowPadding) }, // ImGuiStyleVar_WindowPadding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, WindowRounding) }, // ImGuiStyleVar_WindowRounding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, WindowBorderSize) }, // ImGuiStyleVar_WindowBorderSize
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, WindowMinSize) }, // ImGuiStyleVar_WindowMinSize
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, WindowTitleAlign) }, // ImGuiStyleVar_WindowTitleAlign
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, ChildRounding) }, // ImGuiStyleVar_ChildRounding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, ChildBorderSize) }, // ImGuiStyleVar_ChildBorderSize
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, PopupRounding) }, // ImGuiStyleVar_PopupRounding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, PopupBorderSize) }, // ImGuiStyleVar_PopupBorderSize
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, FramePadding) }, // ImGuiStyleVar_FramePadding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, FrameRounding) }, // ImGuiStyleVar_FrameRounding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, FrameBorderSize) }, // ImGuiStyleVar_FrameBorderSize
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, ItemSpacing) }, // ImGuiStyleVar_ItemSpacing
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, ItemInnerSpacing) }, // ImGuiStyleVar_ItemInnerSpacing
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, IndentSpacing) }, // ImGuiStyleVar_IndentSpacing
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, ScrollbarSize) }, // ImGuiStyleVar_ScrollbarSize
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, ScrollbarRounding) }, // ImGuiStyleVar_ScrollbarRounding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, GrabMinSize) }, // ImGuiStyleVar_GrabMinSize
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, GrabRounding) }, // ImGuiStyleVar_GrabRounding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, TabRounding) }, // ImGuiStyleVar_TabRounding
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, ButtonTextAlign) }, // ImGuiStyleVar_ButtonTextAlign
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, Alpha) }, // ImGuiStyleVar_Alpha
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, WindowPadding) }, // ImGuiStyleVar_WindowPadding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, WindowRounding) }, // ImGuiStyleVar_WindowRounding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, WindowBorderSize) }, // ImGuiStyleVar_WindowBorderSize
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, WindowMinSize) }, // ImGuiStyleVar_WindowMinSize
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, WindowTitleAlign) }, // ImGuiStyleVar_WindowTitleAlign
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, ChildRounding) }, // ImGuiStyleVar_ChildRounding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, ChildBorderSize) }, // ImGuiStyleVar_ChildBorderSize
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, PopupRounding) }, // ImGuiStyleVar_PopupRounding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, PopupBorderSize) }, // ImGuiStyleVar_PopupBorderSize
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, FramePadding) }, // ImGuiStyleVar_FramePadding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, FrameRounding) }, // ImGuiStyleVar_FrameRounding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, FrameBorderSize) }, // ImGuiStyleVar_FrameBorderSize
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, ItemSpacing) }, // ImGuiStyleVar_ItemSpacing
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, ItemInnerSpacing) }, // ImGuiStyleVar_ItemInnerSpacing
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, IndentSpacing) }, // ImGuiStyleVar_IndentSpacing
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, ScrollbarSize) }, // ImGuiStyleVar_ScrollbarSize
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, ScrollbarRounding) }, // ImGuiStyleVar_ScrollbarRounding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, GrabMinSize) }, // ImGuiStyleVar_GrabMinSize
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, GrabRounding) }, // ImGuiStyleVar_GrabRounding
{ ImGuiDataType_Float, 1, (ImU32)IM_OFFSETOF(ImGuiStyle, TabRounding) }, // ImGuiStyleVar_TabRounding
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, ButtonTextAlign) }, // ImGuiStyleVar_ButtonTextAlign
{ ImGuiDataType_Float, 2, (ImU32)IM_OFFSETOF(ImGuiStyle, SelectableTextAlign) }, // ImGuiStyleVar_SelectableTextAlign
};
static const ImGuiStyleVarInfo* GetStyleVarInfo(ImGuiStyleVar idx)