Add layouts and decouple immediate drawings

src/k3menu.c

@@ -3,6 +3,78 @@
 #include<string.h>
 #include<stdio.h>
 #include<GLFW/glfw3.h>
+#include"immdraw.h"
+
+void k3MMeasure(struct k3MObj *this) {
+	for(size_t c = 0; c < this->childCount; c++) {
+		k3MMeasure(this->children[c]);
+	}
+	
+	struct k3MEvent newev = {
+		.code = k3M_EVENT_MEASURE,
+		.kind = k3M_EVENTKIND_DIRECT,
+		
+		.original = (void*) this,
+		.target = (void*) this,
+	};
+	if(!k3MEventSend(&newev)) {
+		this->wDesired = this->w;
+		this->hDesired = this->h;
+	}
+}
+
+void k3MArrange(struct k3MObj *this) {
+	struct k3MEvent newev = {
+		.code = k3M_EVENT_ARRANGE,
+		.kind = k3M_EVENTKIND_DIRECT,
+		
+		.original = (void*) this,
+		.target = (void*) this,
+	};
+	k3MEventSend(&newev);
+	
+	for(size_t c = 0; c < this->childCount; c++) {
+		k3MArrange(this->children[c]);
+	}
+}
+
+static bool linear_measure(struct k3MEvent *ev, uint8_t *ud) {
+	struct k3MObj *o = ev->target;
+	
+	o->wDesired = 0;
+	o->hDesired = 0;
+	
+	for(size_t i = 0; i < o->childCount; i++) {
+		struct k3MObj *c = o->children[i];
+		
+		if(o->wDesired < c->wDesired) {
+			o->wDesired = c->wDesired;
+		}
+		
+		o->hDesired += c->hDesired;
+	}
+}
+static bool linear_arrange(struct k3MEvent *ev, uint8_t *ud) {
+	struct k3MObj *o = ev->target;
+	
+	size_t y = o->y;
+	
+	for(size_t i = 0; i < o->childCount; i++) {
+		struct k3MObj *c = o->children[i];
+		
+		c->x = o->x;
+		c->y = y;
+		
+		c->w = c->wDesired;
+		c->h = c->hDesired;
+		
+		y += c->h;
+	}
+}
+void k3MSetLayoutLinear(struct k3MObj *this, bool vertical) {
+	k3MRegisterEventHandler(this, k3M_EVENT_MEASURE, linear_measure, NULL, 0);
+	k3MRegisterEventHandler(this, k3M_EVENT_ARRANGE, linear_arrange, NULL, 0);
+}
 
 void k3MenuSetBounds_(struct k3MObj *this, int16_t x, int16_t y, int16_t w, int16_t h) {
 	this->x = x;
@@ -38,6 +110,8 @@ int k3MRegisterEventHandler_(struct k3MObj *obj, uint16_t evcode, k3MEventHandle
 	if(ud) {
 		memcpy(obj->handlers[obj->handlerCount - 1].ud, ud, udSize);
 	}
+	
+	return 1;
 }
 
 bool k3MEventSend(struct k3MEvent *ev) {
@@ -83,10 +157,9 @@ static void obj_draw(struct k3MObj *this) {
 		bgColor[3] = bgColorProp->si[3] / 255.0;
 	}
 	
-	k3BatchAdd(NULL, (struct k3RectF) {0, 0, 1, 1}, (struct k3RectF) {
+	if(bgColor[3] != 0) {
-		this->x, this->y,
+		immdraw_fill_rect(this->x, this->y, this->w, this->h, bgColor[0], bgColor[1], bgColor[2], bgColor[3], borderRadius);
-		this->w, this->h
+	}
-	}, 0, bgColor, borderRadius);
 }
 
 static bool label_draw(struct k3MEvent *ev, uint8_t *ud) {
@@ -95,7 +168,13 @@ static bool label_draw(struct k3MEvent *ev, uint8_t *ud) {
 	obj_draw((void*) this);
 	
 	if(this->txt) {
-		k3FontDraw(this->font, this->x, this->y, this->sz, this->txt, (vec4) {1, 1, 1, 1});
+		int alignment = k3M_ALIGN_CENTER;
+		
+		struct k3MProperty *prop = k3MFindProperty(this, k3M_PROP_HORIZONTAL_ALIGNMENT, false);
+		if(prop) alignment = prop->si[0];
+		
+		immdraw_font_draw(this->font, this->x, this->y, this->w, this->sz, strlen(this->txt), this->txt, alignment,
+			1, 1, 1, 1);
 	}
 	
 	return false;
@@ -105,7 +184,7 @@ struct k3MLabel *k3MLabel(struct k3Font *font, float sz, const char *txt) {
 	struct k3MLabel *ret = calloc(1, sizeof(*ret));
 	ret->font = font;
 	ret->sz = sz;
-	ret->txt = txt;
+	ret->txt = strdup(txt);
 	
 	k3MRegisterEventHandler(ret, k3M_EVENT_DRAW, label_draw, NULL, 0);
 	
@@ -260,11 +339,19 @@ static bool textbutton_draw(struct k3MEvent *ev, uint8_t *ud) {
 	obj_draw((void*) this);
 	
 	if(this->txt) {
-		struct k3RectF txtsz;
+		/*struct k3RectF txtsz;
 		k3FontSz(this->font, this->sz, this->txt, &txtsz);
 		
 		k3FontDraw(this->font, this->x + this->w / 2 - txtsz.w / 2, this->y, this->sz, this->txt, (vec4) {
-			1 - 0.8 * this->disabled, 1 - 0.8 * this->disabled, 1 - 0.8 * this->disabled, 1});
+			1 - 0.8 * this->disabled, 1 - 0.8 * this->disabled, 1 - 0.8 * this->disabled, 1});*/
+		
+		int alignment = k3M_ALIGN_CENTER;
+		
+		struct k3MProperty *prop = k3MFindProperty(this, k3M_PROP_HORIZONTAL_ALIGNMENT, false);
+		if(prop) alignment = prop->si[0];
+		
+		immdraw_font_draw(this->font, this->x, this->y, this->w, this->sz, strlen(this->txt), this->txt, alignment,
+			1 - 0.8 * this->disabled, 1 - 0.8 * this->disabled, 1 - 0.8 * this->disabled, 1);
 	}
 	
 	return false;
@@ -274,7 +361,7 @@ struct k3MTextButton *k3MTextButton(struct k3Font *font, float sz, const char *t
 	
 	ret->font = font;
 	ret->sz = sz;
-	ret->txt = txt;
+	ret->txt = strdup(txt);
 	
 	k3MRegisterEventHandler(ret, k3M_EVENT_DRAW, textbutton_draw, NULL, 0);
 	
@@ -287,13 +374,16 @@ static bool textinput_draw(struct k3MEvent *ev, uint8_t *ud) {
 	obj_draw((void*) this);
 	
 	if(this->txt) {
-		int isPlaceholder = strlen(this->txt) == 0;
+		bool isPlaceholder = strlen(this->txt) == 0;
 		const char *txt = isPlaceholder ? this->placeholder : this->txt;
 		
-		struct k3RectF txtsz;
+		/*struct k3RectF txtsz;
 		k3FontSz(this->font, this->sz, txt, &txtsz);
 		
-		k3FontDraw(this->font, this->x, this->y, this->sz, txt, (vec4) {1 - 0.5 * isPlaceholder, 1 - 0.5 * isPlaceholder, 1 - 0.5 * isPlaceholder, 1});
+		k3FontDraw(this->font, this->x, this->y, this->sz, txt, (vec4) {1 - 0.5 * isPlaceholder, 1 - 0.5 * isPlaceholder, 1 - 0.5 * isPlaceholder, 1});*/
+		
+		immdraw_font_draw(this->font, this->x, this->y, this->w, this->sz, strlen(txt), txt, k3M_ALIGN_LEFT,
+			1 - 0.5 * isPlaceholder, 1 - 0.5 * isPlaceholder, 1 - 0.5 * isPlaceholder, 1);
 	}
 	
 	return false;
@@ -302,7 +392,7 @@ static bool textinput_key(struct k3MEvent *ev, uint8_t *ud) {
 	struct k3MTextInput *this = (void*) ev->target;
 	
 	if(ev->key.num == GLFW_KEY_BACKSPACE && ev->code != k3M_EVENT_KEY_RELEASE) {
-		char *last = k3UTF8LastCodepointZ(this->txt);
+		char *last = (char*) k3UTF8LastCodepointZ(this->txt);
 		if(last) {
 			*last = 0;
 		}
@@ -336,7 +426,7 @@ struct k3MTextInput *k3MTextInput(struct k3Font *font, float sz, const char *pla
 	
 	ret->font = font;
 	ret->sz = sz;
-	ret->placeholder = placeholder ? placeholder : "";
+	ret->placeholder = strdup(placeholder ? placeholder : "");
 	ret->txt = strdup(txt ? txt : "");
 	
 	k3MRegisterEventHandler(ret, k3M_EVENT_DRAW, textinput_draw, NULL, 0);

src/k3menu.h

@@ -3,8 +3,9 @@
 #include<stdint.h>
 #include<stdlib.h>
 #include<stdbool.h>
-#include"k3font.h"
+#include<stddef.h>
 
+struct k3Font;
 struct k3MObj;
 
 #define k3M_EVENT_MOUSE_ENTER 0
@@ -18,7 +19,9 @@ struct k3MObj;
 #define k3M_EVENT_INPUT 8
 #define k3M_EVENT_DRAW 9
 #define k3M_EVENT_COMPLETE 10
-#define k3M_EVENT_ALL 11
+#define k3M_EVENT_MEASURE 11
+#define k3M_EVENT_ARRANGE 12
+#define k3M_EVENT_ALL 13
 
 #define k3M_MOUSE_BUTTON_0 0
 #define k3M_MOUSE_BUTTON_1 1
@@ -30,6 +33,16 @@ struct k3MObj;
 
 #define k3M_USERDATA_SIZE 16
 
+#define k3M_ALIGN_LEFT 0
+#define k3M_ALIGN_CENTER 1
+#define k3M_ALIGN_RIGHT 2
+
+#ifdef k3M_FIXED_POINT
+typedef uint8_t k3MCC;
+#else
+typedef float k3MCC;
+#endif
+
 struct k3MEvent {
 	uint16_t code;
 	
@@ -64,6 +77,8 @@ typedef struct k3MEventHandler {
 enum k3MPropertyType {
 	k3M_PROP_BG_COLOR,
 	k3M_PROP_BORDER_RADIUS,
+	k3M_PROP_MARGIN,
+	k3M_PROP_HORIZONTAL_ALIGNMENT,
 };
 struct k3MProperty {
 	enum k3MPropertyType type;
@@ -85,6 +100,9 @@ struct k3MObj {
 	int16_t w;
 	int16_t h;
 	
+	int16_t wDesired;
+	int16_t hDesired;
+	
 	bool invisible, hovered, disabled;
 	
 	k3MEventHandler *handlers;
@@ -93,6 +111,16 @@ struct k3MObj {
 	struct k3MProperty *properties;
 	size_t propertyCount;
 };
+struct k3MObj *k3MObj();
+
+/* Akin to the measure pass of WPF. Recursive, called by parent. Sets wDesired and hDesired. */
+void k3MMeasure(struct k3MObj *this);
+
+/* Akin to the arrange pass of WPF. Recursive, called by parent after w and h is set. Adjusts all children using it's own definitive size. */
+void k3MArrange(struct k3MObj *this);
+
+/* Set linear layout management on this object. Must not be called on descendants of k3MObj. */
+void k3MSetLayoutLinear(struct k3MObj *this, bool vertical);
 
 #define k3MenuSetBounds(a, x, y, w, h) k3MenuSetBounds_((struct k3MObj*) (a), (x), (y), (w), (h))
 void k3MenuSetBounds_(struct k3MObj *this, int16_t x, int16_t y, int16_t w, int16_t h);