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[ui] Position text correctly in its view

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It turns out text positioning was a little more complicated than I
remembered. The Y offset is relative to the baseline with Y going down.
This commit is contained in:
Bill Currie 2023-07-02 15:11:11 +09:00
parent e98cd1355d
commit 68e155448d
1 changed files with 6 additions and 0 deletions
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6
libs/ui/imui.c
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@ -393,6 +393,12 @@ add_text (view_t view, imui_state_t *state, imui_ctx_t *ctx)
int descender = ctx->font->face->size->metrics.descender / 64;
auto len = View_GetLen (text);
View_SetLen (text, len.x, ascender - descender);
// text is positioned such that 0 is the baseline, and +y offset moves
// the text down. The font's global ascender is used to find the baseline
// relative to the top of the view.
auto pos = View_GetPos (text);
View_SetPos (text, pos.x, pos.y - len.y + ascender);
View_SetGravity (text, grav_northwest);
View_SetVisible (text, 1);
Ent_SetComponent (text.id, c_glyphs, reg,