kernel: Label widget

fox32os.def

@@ -63,11 +63,11 @@ get_resource:              jmp [0x00000F10]
 
 ; event types
 const EVENT_TYPE_BUTTON_CLICK:    0x80000000
-const EVENT_TYPE_TEXTBOX_REFRESH: 0x80000001
 
 ; widget types
 const WIDGET_TYPE_BUTTON:     0x00000000
 const WIDGET_TYPE_TEXTBOX_SL: 0x00000001
+const WIDGET_TYPE_LABEL:      0x00000002
 
 ; window flags
 const WINDOW_FLAG_ALWAYS_BACKGROUND: 1

kernel/widget/label.asm

@@ -0,0 +1,50 @@
+; label widget routines
+
+; label widget struct:
+; data.32 next_ptr         - pointer to next widget, or 0 for none
+; data.32 id               - the ID number of this widget
+; data.32 type             - the type of this widget
+; data.32 text_ptr         - pointer to null-terminated text string
+; data.32 foreground_color - text foreground color
+; data.32 background_color - text background color
+; data.16 reserved_1
+; data.16 reserved_2
+; data.16 x_pos            - X coordinate of this widget
+; data.16 y_pos            - Y coordinate of this widget
+
+const LABEL_WIDGET_STRUCT_SIZE: 32 ; 8 words = 32 bytes
+
+; draw a label widget to a window
+; inputs:
+; r0: pointer to window struct
+; r1: pointer to a null-terminated string
+; r2: foreground color
+; r3: background color
+; r4: X coordinate
+; r5: Y coordinate
+; outputs:
+; none
+draw_label_widget:
+    push r0
+    push r1
+    push r2
+    push r3
+    push r4
+    push r5
+
+    call get_window_overlay_number
+    mov r2, r5
+    mov r5, r0
+    mov r0, r1
+    mov r1, r4
+    mov r4, r3
+    mov r3, r2
+    call draw_str_to_overlay
+
+    pop r5
+    pop r4
+    pop r3
+    pop r2
+    pop r1
+    pop r0
+    ret

kernel/widget/widget.asm

@@ -3,6 +3,7 @@
 ; widget types
 const WIDGET_TYPE_BUTTON:     0x00000000
 const WIDGET_TYPE_TEXTBOX_SL: 0x00000001
+const WIDGET_TYPE_LABEL:      0x00000002
 
 ; widget struct:
 ; data.32 next_ptr - pointer to next widget, or 0 for none
@@ -27,6 +28,8 @@ draw_widgets_to_window_next:
     ifz call draw_widgets_to_window_button
     cmp [r10], WIDGET_TYPE_TEXTBOX_SL
     ifz call draw_widgets_to_window_textbox_sl
+    cmp [r10], WIDGET_TYPE_LABEL
+    ifz call draw_widgets_to_window_label
 
     ; point to the next widget, if any
     sub r10, 8
@@ -97,6 +100,31 @@ draw_widgets_to_window_textbox_sl:
     pop r2
     pop r1
     ret
+draw_widgets_to_window_label:
+    push r1
+    push r2
+    push r3
+    push r4
+    push r5
+    push r6
+    push r7
+
+    ; put label parameters in registers for the drawing routine
+    mov r1, [r10+4] ; text_ptr
+    mov r2, [r10+8] ; foreground_color
+    mov r3, [r10+12] ; background_color
+    movz.16 r4, [r10+20] ; x_pos
+    movz.16 r5, [r10+22] ; y_pos
+    call draw_label_widget
+
+    pop r7
+    pop r6
+    pop r5
+    pop r4
+    pop r3
+    pop r2
+    pop r1
+    ret
 
 ; check if a widget was clicked and if so, add an event to the window's event queue
 ; inputs:
@@ -477,4 +505,5 @@ handle_widget_key_up_textbox_sl:
 
     ; include widget types
     #include "widget/button.asm"
+    #include "widget/label.asm"
     #include "widget/textbox_sl.asm"

kernel/window/event.asm

@@ -2,7 +2,6 @@
 
 ; event types
 const EVENT_TYPE_BUTTON_CLICK: 0x80000000
-const EVENT_TYPE_TEXTBOX_REFRESH: 0x80000001
 
 const WINDOW_EVENT_SIZE: 32