jbutton: add new bare-bones button widget for touch

CMakeLists.txt

@@ -34,6 +34,7 @@ add_library(${NAME} STATIC
   src/jframe.c
   src/jlist.c
   src/jscrolledlist.c
+  src/jbutton.c
   src/vec.c
   src/keymap.c
   ${ASSETS_${FXSDK_PLATFORM}}

include/justui/jbutton.h

@@ -0,0 +1,59 @@
+//---
+// JustUI.jbutton: Touchable multi-state click button
+//---
+
+#ifndef _J_JBUTTON
+#define _J_JBUTTON
+
+#include <justui/defs.h>
+#include <justui/jwidget.h>
+
+#include <gint/display.h>
+
+/* jbutton: Button with multiple states
+
+   This widget is your everyday interactible button. It responds to touch by
+   changing its background color for idle, focused and active states. It also
+   has a disabled states which can be used to make a "selected" visual.
+
+   TODO: Allow jbutton it to hold any widget inside.
+   TODO: jbutton's focus state is untested since I only tested touch.
+
+   Events:
+   * JBUTTON_TRIGGERED when activated. */
+
+enum {
+    JBUTTON_IDLE,
+    JBUTTON_ACTIVE,
+    JBUTTON_DISABLED,
+
+    JBUTTON_STATE_NUM,
+};
+
+typedef struct {
+    jwidget widget;
+
+    /* Text shown on the button; not owned by the button */
+    char const *text;
+    /* Rendering font */
+    font_t const *font;
+    /* Colors for all states */
+    color_t fg_colors[JBUTTON_STATE_NUM];
+    color_t bg_colors[JBUTTON_STATE_NUM];
+    /* Current state */
+    int state;
+
+} jbutton;
+
+/* Event IDs */
+extern uint16_t JBUTTON_TRIGGERED;
+
+/* jbutton_create(): Create a button */
+jbutton *jbutton_create(char const *text, void *parent);
+
+/* Trivial properties */
+void jbutton_set_text(jbutton *b, char const *text);
+void jbutton_set_font(jbutton *b, font_t const *font);
+void jbutton_set_disabled(jbutton *b, bool disabled);
+
+#endif /* _J_JBUTTON */

include/justui/jscene.h

@@ -79,10 +79,10 @@ void jscene_render(jscene *scene);
      next, and increasing within child index order within each group.
    * For widgets with a stacked layout, only the active child is considered.
 
-   If content_only is set, this function only intersects with the content box.
-   Otherwise, an intersection with the full box (padding, border and margin
-   included) is performed. */
-jwidget *jscene_widget_at(jscene *scene, int x, int y, bool content_only);
+   If exclude_mp is set, this function only intersects with the content and
+   padding box, excluding margins and borders. Otherwise, an intersection with
+   the full box (padding, border and margin included) is performed. */
+jwidget *jscene_widget_at(jscene *scene, int x, int y, bool exclude_mp);
 
 //---
 // Events sent from the scene to the user

include/justui/jwidget.h

@@ -341,6 +341,8 @@ void jwidget_layout(void *scene_root);
 
 /* jwidget_absolute_x(): Absolute x-position of a widget
    jwidget_absolute_y(): Absolute y-position of a widget
+   jwidget_absolute_padding_x(): Absolute x-position of a widget's padding box
+   jwidget_absolute_padding_y(): Absolute y-position of a widget's padding box
    jwidget_absolute_content_x(): Absolute x-position of a widget's content box
    jwidget_absolute_content_y(): Absolute y-position of a widget's content box
 
@@ -348,6 +350,8 @@ void jwidget_layout(void *scene_root);
    with a full-screen scene. */
 int jwidget_absolute_x(void *w);
 int jwidget_absolute_y(void *w);
+int jwidget_absolute_padding_x(void *w);
+int jwidget_absolute_padding_y(void *w);
 int jwidget_absolute_content_x(void *w);
 int jwidget_absolute_content_y(void *w);
 
@@ -361,6 +365,17 @@ int jwidget_absolute_content_y(void *w);
 int jwidget_content_width(void *w);
 int jwidget_content_height(void *w);
 
+/* jwidget_width(): With of a widget's padding box
+   jwidget_height(): Height of a widget's padding box
+
+   These functions return the size of the padding box of a widget, which
+   includes the content and padding. These are the dimensions that appear as
+   the widget's size when there is a background. These dimensions are known
+   only after layout; calling these functions when the layout is not up-to-date
+   will return funny results. */
+int jwidget_padding_width(void *w);
+int jwidget_padding_height(void *w);
+
 /* jwidget_full_width(): Width of a widget's margin box
    jwidget_full_height(): Height of a widget's margin box
 

src/jbutton.c

@@ -0,0 +1,139 @@
+#include <justui/jwidget.h>
+#include <justui/jwidget-api.h>
+#include <justui/jbutton.h>
+#include <justui/config.h>
+
+#include <stdlib.h>
+
+J_DEFINE_WIDGET(jbutton, csize, render, event)
+J_DEFINE_EVENTS(JBUTTON_TRIGGERED)
+
+static void jbutton_set_state(jbutton *b, int state)
+{
+    if((uint)state >= JBUTTON_STATE_NUM || b->state == state)
+        return;
+    b->state = state;
+    jwidget_set_background(b, b->bg_colors[state]);
+    b->widget.update = 1;
+}
+
+jbutton *jbutton_create(char const *text, void *parent)
+{
+    if(jbutton_type_id < 0)
+        return NULL;
+
+    jbutton *b = malloc(sizeof *b);
+    if(!b)
+        return NULL;
+
+    jwidget_init(&b->widget, jbutton_type_id, parent);
+    jwidget_set_focus_policy(b, J_FOCUS_POLICY_ACCEPT);
+
+    b->text = text ? text : "";
+    b->font = dfont_default();
+
+#if GINT_RENDER_MONO
+    b->fg_colors[JBUTTON_IDLE] = C_WHITE;
+    b->fg_colors[JBUTTON_ACTIVE] = C_WHITE;
+    b->fg_colors[JBUTTON_DISABLED] = C_BLACK;
+    b->bg_colors[JBUTTON_IDLE] = C_BLACK;
+    b->bg_colors[JBUTTON_ACTIVE] = C_BLACK;
+    b->bg_colors[JBUTTON_DISABLED] = C_WHITE;
+    jwidget_set_padding(b, 1, 2, 1, 2);
+#endif
+#if GINT_RENDER_RGB
+    b->fg_colors[JBUTTON_IDLE] = C_WHITE;
+    b->fg_colors[JBUTTON_ACTIVE] = C_WHITE;
+    b->fg_colors[JBUTTON_DISABLED] = C_RGB(8, 8, 8);
+    b->bg_colors[JBUTTON_IDLE] = C_BLACK;
+    b->bg_colors[JBUTTON_ACTIVE] = C_RGB(8, 8, 8);
+    b->bg_colors[JBUTTON_DISABLED] = C_RGB(24, 24, 24);
+    jwidget_set_padding(b, 2, 4, 2, 4);
+#endif
+
+    jbutton_set_state(b, JBUTTON_IDLE);
+    return b;
+}
+
+void jbutton_set_text(jbutton *b, char const *text)
+{
+    b->text = text ? text : "";
+    b->widget.dirty = 1;
+}
+
+void jbutton_set_font(jbutton *b, font_t const *font)
+{
+    b->font = font ? font : dfont_default();
+    b->widget.dirty = 1;
+}
+
+void jbutton_set_disabled(jbutton *b, bool disabled)
+{
+    if(disabled)
+        jbutton_set_state(b, JBUTTON_DISABLED);
+    else if(b->state == JBUTTON_DISABLED)
+        jbutton_set_state(b, JBUTTON_IDLE);
+}
+
+//---
+// Polymorphic widget operations
+//---
+
+void jbutton_poly_csize(void *b0)
+{
+    jbutton *b = b0;
+    int w, h;
+    dsize(b->text, b->font ? b->font : dfont_default(), &w, &h);
+    b->widget.w = w;
+    b->widget.h = h;
+}
+
+void jbutton_poly_render(void *b0, int x, int y)
+{
+    jbutton *b = b0;
+    int cw = jwidget_content_width(b);
+    int ch = jwidget_content_height(b);
+
+    int fg = b->fg_colors[b->state];
+    font_t const *old_font = dfont(b->font);
+    dtext_opt(x + cw / 2, y + ch / 2, fg, C_NONE, DTEXT_CENTER, DTEXT_MIDDLE,
+        b->text, -1);
+    dfont(old_font);
+}
+
+bool jbutton_poly_event(void *b0, jevent e)
+{
+    jbutton *b = b0;
+    key_event_t ev = { .type = KEYEV_NONE };
+    if(e.type == JWIDGET_KEY)
+        ev = e.key;
+
+#if J_CONFIG_TOUCH
+    bool accepts_touch = b->state != JBUTTON_DISABLED;
+    if((ev.type == KEYEV_TOUCH_DOWN || ev.type == KEYEV_TOUCH_DRAG ||
+        ev.type == KEYEV_TOUCH_UP) && accepts_touch) {
+        int lx = ev.x - jwidget_absolute_padding_x(b);
+        int ly = ev.y - jwidget_absolute_padding_y(b);
+        uint cw = jwidget_padding_width(b);
+        uint ch = jwidget_padding_height(b);
+        bool inside = (uint)lx < cw && (uint)ly < ch;
+
+        if(ev.type == KEYEV_TOUCH_DOWN)
+            jbutton_set_state(b, JBUTTON_ACTIVE);
+        if(ev.type == KEYEV_TOUCH_DRAG)
+            jbutton_set_state(b, inside ? JBUTTON_ACTIVE : JBUTTON_IDLE);
+        if(ev.type == KEYEV_TOUCH_UP && b->state == JBUTTON_ACTIVE) {
+            jbutton_set_state(b, JBUTTON_IDLE);
+            jwidget_emit(b, (jevent){ .type = JBUTTON_TRIGGERED });
+        }
+        return true;
+    }
+#endif
+
+    if(ev.type == KEYEV_DOWN && (ev.key == KEY_EXE || ev.key == KEY_OK)) {
+        jwidget_emit(b, (jevent){ .type = JBUTTON_TRIGGERED });
+        return true;
+    }
+
+    return jwidget_poly_event(b, e);
+}

src/jfileselect.c

@@ -21,7 +21,7 @@ static int jfileselect_type_id = -1;
 # define JFILESELECT_SCROLLBAR_WIDTH 1
 # define JFILESELECT_INFO_SHORT 1
 #elif GINT_RENDER_RGB
-# define JFILESELECT_LINE_SPACING 4
+# define JFILESELECT_LINE_SPACING (J_CONFIG_TOUCH ? 6 : 4)
 # define JFILESELECT_SCROLLBAR_WIDTH 2
 # define JFILESELECT_INFO_SHORT 0
 #endif
@@ -353,6 +353,8 @@ bool jfileselect_default_filter(struct dirent const *ent)
 		return false;
 	if(!strcmp(ent->d_name, "SAVE-F"))
 		return false;
+	if(!strcmp(ent->d_name, "AutoImport"))
+		return false;
 	if(!strcmp(ent->d_name, "."))
 		return false;
 	if(!strcmp(ent->d_name, ".."))
@@ -360,7 +362,7 @@ bool jfileselect_default_filter(struct dirent const *ent)
 	return true;
 }
 
-static void jfileselect_select(jfileselect *fs, int index)
+GUNUSED static void jfileselect_select(jfileselect *fs, int index)
 {
 	/* Normalize out-of-bounds to -1 */
 	if(index < 0 || index >= fs->entry_count)

src/jlist.c

@@ -167,7 +167,7 @@ jrect jlist_selected_region(jlist *l)
 // Polymorphic widget operations
 //---
 
-static int item_index_at(void *l0, int ly)
+GUNUSED static int item_index_at(void *l0, int ly)
 {
     jlist *l = l0;
     int y = 0;

src/jscene.c

@@ -97,10 +97,10 @@ void jscene_render(jscene *s)
 		jwidget *w =
 			jscene_widget_at(s, s->touch_last_x, s->touch_last_y, true);
 		if(w) {
-			int x1 = jwidget_absolute_content_x(w);
-			int y1 = jwidget_absolute_content_y(w);
-			int x2 = x1 + jwidget_content_width(w) - 1;
-			int y2 = y1 + jwidget_content_height(w) - 1;
+			int x1 = jwidget_absolute_padding_x(w);
+			int y1 = jwidget_absolute_padding_y(w);
+			int x2 = x1 + jwidget_padding_width(w) - 1;
+			int y2 = y1 + jwidget_padding_height(w) - 1;
 			drect_border(x1, y1, x2, y2, C_NONE, 1, C_RED);
 
 			dprint_opt(DWIDTH-1, 0, C_WHITE, C_RED, DTEXT_RIGHT, DTEXT_TOP,
@@ -112,24 +112,31 @@ void jscene_render(jscene *s)
 
 /* Find sub-widget based on w-local coordinates. */
 static jwidget *jscene_widget_at_rec(
-	jwidget *w, int x, int y, bool content_only, bool visible_only)
+	jwidget *w, int x, int y, bool exclude_mp, bool visible_only)
 {
 	if(!w)
 		return NULL;
 	jwidget *found;
 
 	jwidget_geometry const *g = jwidget_geometry_r(w);
+	/* Content box (this is what children's xy are measured against) */
     int xC = g->margin.left + g->border.left + g->padding.left;
-    int yC = w->y + g->margin.top + g->border.top + g->padding.top;
+    int yC = g->margin.top + g->border.top + g->padding.top;
     uint wC = jwidget_content_width(w);
     uint hC = jwidget_content_height(w);
+    /* Padding box */
+    int xP = xC - g->padding.left;
+    int yP = yC - g->padding.top;
+    uint wP = wC + g->padding.left + g->padding.right;
+    uint hP = hC + g->padding.top + g->padding.bottom;
+    /* Full box (implicitly starts at 0,0) */
 	uint wF = jwidget_full_width(w);
 	uint hF = jwidget_full_height(w);
 
 	/* Check if we intersect w at all */
 	bool intersects;
-	if(content_only)
-		intersects = ((uint)(x - xC) < wC) && ((uint)(y - yC) < hC);
+	if(exclude_mp)
+		intersects = ((uint)(x - xP) < wP) && ((uint)(y - yP) < hP);
 	else
 		intersects = (uint)x < wF && (uint)y < hF;
 	if(!intersects)
@@ -141,8 +148,8 @@ static jwidget *jscene_widget_at_rec(
 		if(stack->active < 0)
 			return w;
 		jwidget *child = w->children[stack->active];
-		found = jscene_widget_at_rec(child, x - xC, y - yC, content_only,
-			visible_only);
+		found = jscene_widget_at_rec(child, x - xC - child->x,
+			y - yC - child->y, exclude_mp, visible_only);
 		return found ? found : w;
 	}
 
@@ -150,8 +157,8 @@ static jwidget *jscene_widget_at_rec(
 	for(int k = 0; k < w->child_count; k++) {
 		jwidget *child = w->children[k];
 		if(child->visible >= visible_only && child->floating) {
-			found = jscene_widget_at_rec(child, x - xC, y - yC, content_only,
-				visible_only);
+			found = jscene_widget_at_rec(child, x - xC - child->x,
+				y - yC - child->y, exclude_mp, visible_only);
 			if(found)
 				return found;
 		}
@@ -161,8 +168,8 @@ static jwidget *jscene_widget_at_rec(
 	for(int k = 0; k < w->child_count; k++) {
 		jwidget *child = w->children[k];
 		if(child->visible >= visible_only && !child->floating) {
-			found = jscene_widget_at_rec(child, x - xC, y - yC, content_only,
-				visible_only);
+			found = jscene_widget_at_rec(child, x - xC - child->x,
+				y - yC - child->y, exclude_mp, visible_only);
 			if(found)
 				return found;
 		}
@@ -172,9 +179,9 @@ static jwidget *jscene_widget_at_rec(
 	return w;
 }
 
-jwidget *jscene_widget_at(jscene *scene, int x, int y, bool content_only)
+jwidget *jscene_widget_at(jscene *scene, int x, int y, bool exclude_mp)
 {
-	return jscene_widget_at_rec(&scene->widget, x, y, content_only, true);
+	return jscene_widget_at_rec(&scene->widget, x, y, exclude_mp, true);
 }
 
 //---

src/jwidget.c

@@ -570,13 +570,39 @@ void jwidget_layout(void *root0)
 int jwidget_absolute_x(void *w0)
 {
 	J_CAST(w)
-	return w ? w->x + jwidget_absolute_x(w->parent) : 0;
+	if(!w)
+		return 0;
+	jwidget_geometry const *g = jwidget_geometry_r(w);
+	return jwidget_absolute_content_x(w) -
+		g->padding.left - g->border.left - g->margin.left;
 }
 
 int jwidget_absolute_y(void *w0)
 {
 	J_CAST(w)
-	return w ? w->y + jwidget_absolute_y(w->parent) : 0;
+	if(!w)
+		return 0;
+	jwidget_geometry const *g = jwidget_geometry_r(w);
+	return jwidget_absolute_content_y(w) -
+		g->padding.top - g->border.top - g->margin.top;
+}
+
+int jwidget_absolute_padding_x(void *w0)
+{
+	J_CAST(w)
+	if(!w)
+		return 0;
+	jwidget_geometry const *g = jwidget_geometry_r(w);
+	return jwidget_absolute_content_x(w) - g->padding.left;
+}
+
+int jwidget_absolute_padding_y(void *w0)
+{
+	J_CAST(w)
+	if(!w)
+		return 0;
+	jwidget_geometry const *g = jwidget_geometry_r(w);
+	return jwidget_absolute_content_y(w) - g->padding.top;
 }
 
 int jwidget_absolute_content_x(void *w0)
@@ -617,6 +643,24 @@ int jwidget_content_height(void *w0)
 	            - g->margin.bottom - g->border.bottom - g->padding.bottom;
 }
 
+int jwidget_padding_width(void *w0)
+{
+	J_CAST(w)
+	jwidget_geometry const *g = jwidget_geometry_r(w);
+
+	return w->w - g->margin.left  - g->border.left
+	            - g->margin.right - g->border.right;
+}
+
+int jwidget_padding_height(void *w0)
+{
+	J_CAST(w)
+	jwidget_geometry const *g = jwidget_geometry_r(w);
+
+	return w->h - g->margin.top    - g->border.top
+	            - g->margin.bottom - g->border.bottom;
+}
+
 int jwidget_full_width(void *w0)
 {
 	J_CAST(w)