From e74065e71667d8df1529f8ca32e14f3e54119ea1 Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sat, 24 Jun 2017 21:16:44 +0200
Subject: started to implement a widget showing text, the problem currently is
 the inheritance method in draw is not working correctly

---
 src/gui/composite_widget.h |  1 -
 src/gui/text_widget.c      | 64 ++++++++++++++++++++++++++++++++++++++++++++++
 src/gui/text_widget.h      | 22 ++++++++++++++++
 3 files changed, 86 insertions(+), 1 deletion(-)
 create mode 100644 src/gui/text_widget.c
 create mode 100644 src/gui/text_widget.h

(limited to 'src/gui')

diff --git a/src/gui/composite_widget.h b/src/gui/composite_widget.h
index 2b27e32..28e1e02 100644
--- a/src/gui/composite_widget.h
+++ b/src/gui/composite_widget.h
@@ -16,7 +16,6 @@ typedef struct {
 	widget_t *children[MAX_NOF_WIDGET_CHILDREN];
 	int nof_children;
 	widget_t *focused_child;
-	vga_color_t background_color;
 } composite_widget_t;
 
 void composite_widget_init( composite_widget_t *widget, widget_t *parent, const int x, const int y, const int w, const int h, const vga_color_t background_color );
diff --git a/src/gui/text_widget.c b/src/gui/text_widget.c
new file mode 100644
index 0000000..fbb3754
--- /dev/null
+++ b/src/gui/text_widget.c
@@ -0,0 +1,64 @@
+#include "text_widget.h"
+
+#include "string.h"
+#include "stddef.h"
+
+static text_widget_vtable_t text_widget_vtable = {
+	{
+		text_widget_draw,
+		widget_get_focus,
+		widget_model_to_screen,
+		widget_contains_coordinate,
+		widget_on_mouse_down,
+		widget_on_mouse_up,
+		widget_on_mouse_move,
+		widget_on_key_down,
+		widget_on_key_up
+	},
+	text_widget_set_text
+};
+
+void text_widget_init( text_widget_t *widget, widget_t *parent, const int x, const int y, const int w, const int h, const vga_color_t background_color, const char *s )
+{
+	memset( widget, 0, sizeof( text_widget_t ) );
+
+	widget_init( &widget->base, parent, x, y, w, h, background_color );	
+
+	// TODO: const for now, caller has to preserve the text
+	// maybe with memory manager in place we can do this with a strdup
+	widget->s = s;
+
+	widget->vtable = &text_widget_vtable;
+}
+
+void text_widget_draw( void *obj, graphics_context_t *context )
+{
+	text_widget_t *widget = obj;
+
+	widget->base.vtable->draw( obj, context );
+
+	int x = 0;
+	int y = 0;
+
+	widget->base.vtable->model_to_screen( widget, &x, &y );
+
+	for( char c = widget->s[0]; c != '\0'; c++ ) {
+		vga_draw_char( context, c, x, y, widget->base.background_color,
+		VGA_COLOR_WHITE );
+		x += 9;
+		if( x >= widget->base.w - 9 ) {
+			y += 16;
+			x = 0;
+		}
+	}
+
+}
+
+void text_widget_set_text( void *obj, const char *s )
+{
+	text_widget_t *widget = obj;
+
+	// TODO: see above
+	widget->s = s;
+}
+
diff --git a/src/gui/text_widget.h b/src/gui/text_widget.h
new file mode 100644
index 0000000..4b00b4f
--- /dev/null
+++ b/src/gui/text_widget.h
@@ -0,0 +1,22 @@
+#ifndef TEXT_WIDGET_H
+#define TEXT_WIDGET_H
+
+#include "widget.h"
+
+typedef struct {
+	widget_vtable_t base;
+	void (*set_text)( void *obj, const char *s );
+} text_widget_vtable_t;
+
+typedef struct {
+	widget_t base;
+	text_widget_vtable_t *vtable;
+	const char *s;
+} text_widget_t;
+
+void text_widget_init( text_widget_t *widget, widget_t *parent, const int x, const int y, const int w, const int h, const vga_color_t background_color, const char *s );
+
+void text_widget_draw( void *obj, graphics_context_t *context );
+void text_widget_set_text( void *obj, const char *s );
+
+#endif // TEXT_WIDGET_H
-- 
cgit v1.2.3-54-g00ecf