From 4152fbecb6ee8360575aa4c24e9cedf822f159dc Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Wed, 25 Mar 2026 19:59:14 -0700
Subject: Implement vertical and horizontal layouts. Use widget position
 properly when rendering. Toolbar, buttons and edit bars WIP

---
 include/ui.h | 81 ++++++++++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 60 insertions(+), 21 deletions(-)

(limited to 'include')

diff --git a/include/ui.h b/include/ui.h
index baaa550..b70df59 100644
--- a/include/ui.h
+++ b/include/ui.h
@@ -42,15 +42,19 @@ typedef int uiWidgetId;
 /// Widget type.
 typedef enum uiWidgetType {
   uiTypeButton,
+  uiTypeEdit,
   uiTypeFrame,
   uiTypeLabel,
+  uiTypeLayout,
   uiTypeTable,
   uiTypeMax,
 } uiWidgetType;
 
 typedef struct uiButton uiButton;
+typedef struct uiEdit   uiEdit;
 typedef struct uiFrame  uiFrame;
 typedef struct uiLabel  uiLabel;
+typedef struct uiLayout uiLayout;
 typedef struct uiTable  uiTable;
 typedef struct uiWidget uiWidget;
 
@@ -59,13 +63,33 @@ typedef struct uiPtr {
   uiWidgetType type;
   union {
     uiButton* button;
+    uiEdit*   edit;
     uiFrame*  frame;
     uiLabel*  label;
+    uiLayout* layout;
     uiTable*  table;
     uiWidget* widget;
   };
 } uiPtr;
 
+/// Direction in which a layout widget lays out its children.
+typedef enum uiLayoutDirection {
+  uiVertical,
+  uiHorizontal,
+} uiLayoutDirection;
+
+/// Directions in which a widget stretches.
+///
+/// Stretch determines how the widget occupies the area of its parent widget.
+///
+/// uiStretchNone - the widget has a fixed size.
+/// uiStretchX/Y  - the widget stretches in the X/Y direction.
+typedef enum uiStretch {
+  uiStretchNone = 0,
+  uiStretchX    = 1,
+  uiStretchY    = 2,
+} uiStretch;
+
 /// Mouse button.
 typedef enum uiMouseButton {
   uiLMB,
@@ -145,6 +169,11 @@ typedef struct uiWidgetEvent {
   };
 } uiWidgetEvent;
 
+/// Common construction parameters for widgets.
+typedef struct uiParams {
+  uiStretch stretch;
+} uiParams;
+
 // -----------------------------------------------------------------------------
 // Library.
 
@@ -152,63 +181,76 @@ bool uiInit(void);
 void uiShutdown(void);
 
 // -----------------------------------------------------------------------------
-// Widget pointers.
+// Widget.
 
 uiPtr uiMakeButtonPtr(uiButton*);
+uiPtr uiMakeEditPtr(uiEdit*);
 uiPtr uiMakeFramePtr(uiFrame*);
 uiPtr uiMakeLabelPtr(uiLabel*);
+uiPtr uiMakeLayoutPtr(uiLayout*);
 uiPtr uiMakeTablePtr(uiTable*);
 uiPtr uiMakeWidgetPtr(uiWidget*);
 uiPtr uiNullptr(void);
-bool  uiIsNullptr(uiPtr ptr);
+bool  uiIsNullptr(uiPtr);
 
-uiButton* uiGetButtonPtr(uiPtr ptr);
-uiFrame*  uiGetFramePtr(uiPtr ptr);
-uiLabel*  uiGetLabelPtr(uiPtr ptr);
-uiTable*  uiGetTablePtr(uiPtr ptr);
-
-// -----------------------------------------------------------------------------
-// Widget.
+uiButton* uiGetButtonPtr(uiPtr);
+uiEdit*   uiGetEditPtr(uiPtr);
+uiFrame*  uiGetFramePtr(uiPtr);
+uiLabel*  uiGetLabelPtr(uiPtr);
+uiLayout* uiGetLayoutPtr(uiPtr);
+uiTable*  uiGetTablePtr(uiPtr);
 
 uiWidgetType uiWidgetGetType(const uiWidget*);
-void         uiWidgetSetParent(uiPtr child, uiPtr parent);
-
-// -----------------------------------------------------------------------------
-// Button.
 
-uiButton* uiMakeButton(const char* text);
+void uiPrint(uiPtr);
 
 // -----------------------------------------------------------------------------
 // Frame.
 
 uiFrame* uiMakeFrame(void);
 void     uiDestroyFrame(uiFrame**);
-void     uiResizeFrame(uiFrame*, int width, int height);
 uiSize   uiGetFrameSize(const uiFrame*);
 
+// -----------------------------------------------------------------------------
+// Layout.
+uiLayout* uiMakeLayout(uiPtr parent, uiLayoutDirection);
+
+// -----------------------------------------------------------------------------
+// Button.
+
+uiButton* uiMakeButton(uiPtr parent, const char* text, const uiParams*);
+
 // -----------------------------------------------------------------------------
 // Label.
 
-uiLabel*    uiMakeLabel(const char* text);
+uiLabel*    uiMakeLabel(uiPtr parent, const char* text);
 const char* uiLabelGetText(const uiLabel*);
 
 // -----------------------------------------------------------------------------
 // Table.
 
-uiTable*    uiMakeTable(int rows, int cols, const char** header);
+uiTable*    uiMakeTable(uiPtr parent, int rows, int cols, const char** header);
 void        uiTableClear(uiTable*);
 void        uiTableAddRow(uiTable*, const char** row);
 void        uiTableSet(uiTable*, int row, int col, const char* text);
 const char* uiTableGet(const uiTable*, int row, int col);
 void        uiTableScroll(uiTable*, int row);
 
+// -----------------------------------------------------------------------------
+// Layout.
+
+/// Lay out the widgets in the frame given the frame's new width and height.
+///
+/// This should typically be called whenever the window is resized.
+void uiLayOut(uiFrame*, int width, int height);
+
 // -----------------------------------------------------------------------------
 // Rendering.
 
 void uiRender(const uiFrame*, uiSurface*);
 
 // -----------------------------------------------------------------------------
-// UI Events.
+// UI and user events.
 
 /// Get the widget events.
 /// Return the number of events in the returned array.
@@ -218,9 +260,6 @@ void uiRender(const uiFrame*, uiSurface*);
 /// therefore report zero widget events.
 int uiGetEvents(uiWidgetEvent const**);
 
-// -----------------------------------------------------------------------------
-// User input.
-
 /// Send an input event to the UI.
 /// Return true if the UI requires a redraw.
 bool uiSendEvent(uiFrame*, const uiInputEvent*);
-- 
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