C++ EXTRADATA函數代碼示例

void uiSequenceNode::onWindowOpened (uiNode_t* node, linkedList_t* params)
{
	if (EXTRADATA(node).context == nullptr)
		EXTRADATA(node).context = SEQ_AllocContext();
	if (EXTRADATA(node).source != nullptr) {
		SEQ_InitContext(EXTRADATA(node).context, EXTRADATA(node).source);
		EXTRADATA(node).playing = true;
	}
}

void uiBaseInventoryNode::onMouseDown (uiNode_t* node, int x, int y, int button)
{
	switch (button) {
	case K_MOUSE1:
	{
		/* start drag and drop */
		int fromX, fromY;
		dragInfoIC = UI_BaseInventoryNodeGetItem(node, x, y, &fromX, &fromY);
		if (dragInfoIC) {
			dragInfoFromX = fromX;
			dragInfoFromY = fromY;
			oldMouseX = x;
			oldMouseY = y;
			UI_SetMouseCapture(node);
			EXTRADATA(node).super.lastSelectedId = dragInfoIC->def()->idx;
			if (EXTRADATA(node).super.onSelect) {
				UI_ExecuteEventActions(node, EXTRADATA(node).super.onSelect);
			}
			if (EXTRADATA(node).super.lua_onSelect != LUA_NOREF) {
				UI_ExecuteLuaEventScript(node, EXTRADATA(node).super.lua_onSelect);
			}
		}
		break;
	}
	case K_MOUSE2:
		if (UI_DNDIsDragging()) {
			UI_DNDAbort();
		} else {
			/* auto place */
			UI_ContainerNodeAutoPlace(node, x, y);
		}
		break;
	default:
		break;
	}
}

/**
 * Update the client zone
 */
static void UI_ClientLayout (uiNode_t *node)
{
	int width = 0;
	int height = 0;
	uiNode_t *child;
	qboolean updated;
	for (child = node->firstChild; child; child = child->next) {
		int value;
		value = child->pos[0] + child->size[0];
		if (value > width)
			width = value;
		value = child->pos[1] + child->size[1];
		if (value > height)
			height = value;
	}

	width += node->padding;
	height += node->padding;

	updated = UI_SetScroll(&EXTRADATA(node).super.scrollX, -1, node->size[0], width);
	updated = UI_SetScroll(&EXTRADATA(node).super.scrollY, -1, node->size[1], height) || updated;
	if (updated && EXTRADATA(node).super.onViewChange)
		UI_ExecuteEventActions(node, EXTRADATA(node).super.onViewChange);
}

/**
 * @brief Draw a small square with the layout of the given base
 */
static void UI_BaseLayoutNodeDraw (uiNode_t * node)
{
	base_t *base;
	int height, width, y;
	int row, col;
	const vec4_t c_gray = {0.5, 0.5, 0.5, 1.0};
	vec2_t nodepos;
	int totalMarge;

	if (EXTRADATA(node).baseid >= MAX_BASES || EXTRADATA(node).baseid < 0)
		return;

	totalMarge = node->padding * (BASE_SIZE + 1);
	width = (node->size[0] - totalMarge) / BASE_SIZE;
	height = (node->size[1] - totalMarge) / BASE_SIZE;

	UI_GetNodeAbsPos(node, nodepos);

	base = B_GetBaseByIDX(EXTRADATA(node).baseid);

	y = nodepos[1] + node->padding;
	for (row = 0; row < BASE_SIZE; row++) {
		int x = nodepos[0] + node->padding;
		for (col = 0; col < BASE_SIZE; col++) {
			if (B_IsTileBlocked(base, col, row)) {
				UI_DrawFill(x, y, width, height, c_gray);
			} else if (B_GetBuildingAt(base, col, row) != NULL) {
				/* maybe destroyed in the meantime */
				if (base->founded)
					UI_DrawFill(x, y, width, height, node->color);
			}
			x += width + node->padding;
		}
		y += height + node->padding;
	}
}

/**
 * @brief Handles selectboxes clicks
 */
void uiSelectBoxNode::onLeftClick (uiNode_t* node, int x, int y)
{
	/* dropdown the node */
	if (UI_GetMouseCapture() == nullptr) {
		UI_SetMouseCapture(node);
		return;
	}

	vec2_t pos;
	UI_GetNodeAbsPos(node, pos);
	int clickedAtOption = (y - pos[1]);

	/* we click outside */
	if (x < pos[0] || y < pos[1] || x >= pos[0] + node->box.size[0] || y >= pos[1] + node->box.size[1] * (EXTRADATA(node).count + 1)) {
		UI_MouseRelease();
		return;
	}

	/* we click on the head */
	if (clickedAtOption < node->box.size[1]) {
		UI_MouseRelease();
		return;
	}

	clickedAtOption = (clickedAtOption - node->box.size[1]) / node->box.size[1];
	if (clickedAtOption < 0 || clickedAtOption >= EXTRADATA(node).count)
		return;

	if (UI_AbstractOptionGetCurrentValue(node) == nullptr)
		return;

	/* select the right option */
	uiNode_t* option = UI_AbstractOptionGetFirstOption(node);
	for (; option; option = option->next) {
		if (option->invis)
			continue;
		if (clickedAtOption == 0)
			break;
		clickedAtOption--;
	}

	/* update the status */
	if (option)
		UI_AbstractOptionSetCurrentValue(node, OPTIONEXTRADATA(option).value);

	/* close the dropdown */
	UI_MouseRelease();
}

static qboolean UI_RadioButtonNodeIsSelected (uiNode_t *node)
{
	if (EXTRADATA(node).string == NULL) {
		const float current = UI_GetReferenceFloat(node, EXTRADATA(node).cvar);
		return current > EXTRADATA(node).value - EPSILON && current < EXTRADATA(node).value + EPSILON;
	} else {
		const char *current = UI_GetReferenceString(node, EXTRADATA(node).cvar);
		return Q_streq(current, EXTRADATA(node).string);
	}
}

/**
 * @brief Draws a base.
 */
void uiBaseMapNode::draw (uiNode_t * node)
{
	int col, row;
	bool hover = node->state;
	getCellAtPos(node, mousePosX, mousePosY, &col, &row);
	if (col == -1)
		hover = false;

	const int width = node->box.size[0] / BASE_SIZE;
	const int height = node->box.size[1] / BASE_SIZE + BASE_IMAGE_OVERLAY;

	vec2_t nodePos;
	UI_GetNodeAbsPos(node, nodePos);

	GAME_DrawBase(EXTRADATA(node).baseid, nodePos[0], nodePos[1], width, height, col, row, hover, BASE_IMAGE_OVERLAY);
}

/**
 * @brief Called when the node lost the focus
 */
void uiTextEntryNode::onFocusLost (uiNode_t* node)
{
	/* already aborted/changed with the keyboard */
	if (editedCvar == nullptr)
		return;

	/* release the keyboard */
	if (isAborted || EXTRADATA(node).clickOutAbort) {
		UI_TextEntryNodeAbortEdition(node);
	} else {
		UI_TextEntryNodeValidateEdition(node);
	}
#if SDL_VERSION_ATLEAST(2,0,0)
	SDL_StopTextInput();
#endif
}

void uiTextNode::onLoaded (uiNode_t* node)
{
	int lineheight = EXTRADATA(node).lineHeight;
	/* auto compute lineheight */
	/* we don't overwrite EXTRADATA(node).lineHeight, because "0" is dynamically replaced by font height on draw function */
	if (lineheight == 0) {
		/* the font is used */
		const char* font = UI_GetFontFromNode(node);
		lineheight = UI_FontGetHeight(font);
	}

	/* auto compute rows (super.viewSizeY) */
	if (EXTRADATA(node).super.scrollY.viewSize == 0) {
		if (node->box.size[1] != 0 && lineheight != 0) {
			EXTRADATA(node).super.scrollY.viewSize = node->box.size[1] / lineheight;
		} else {
			EXTRADATA(node).super.scrollY.viewSize = 1;
			Com_Printf("UI_TextNodeLoaded: node '%s' has no rows value\n", UI_GetPath(node));
		}
	}

	/* auto compute height */
	if (node->box.size[1] == 0) {
		node->box.size[1] = EXTRADATA(node).super.scrollY.viewSize * lineheight;
	}

	/* is text slot exists */
	if (EXTRADATA(node).dataID >= UI_MAX_DATAID)
		Com_Error(ERR_DROP, "Error in node %s - max shared data id num exceeded (num: %i, max: %i)", UI_GetPath(node), EXTRADATA(node).dataID, UI_MAX_DATAID);

#ifdef DEBUG
	if (EXTRADATA(node).super.scrollY.viewSize != (int)(node->box.size[1] / lineheight)) {
		Com_Printf("UI_TextNodeLoaded: rows value (%i) of node '%s' differs from size (%.0f) and format (%i) values\n",
			EXTRADATA(node).super.scrollY.viewSize, UI_GetPath(node), node->box.size[1], lineheight);
	}
#endif

	if (node->text == nullptr && EXTRADATA(node).dataID == TEXT_NULL)
		Com_Printf("UI_TextNodeLoaded: 'textid' property of node '%s' is not set\n", UI_GetPath(node));
}

/**
 * @brief Called when the node is captured by the mouse
 */
void uiVScrollbarNode::onCapturedMouseMove (uiNode_t* node, int x, int y)
{
	if (capturedElement != 2)
		return;

	const int posSize = EXTRADATA(node).fullsize;
	const int graphicSize = node->box.size[1] - (4 * ELEMENT_HEIGHT);

	/* compute mouse mouse */
	y -= oldMouseY;

	/* compute pos projection */
	const int pos = oldPos + (((float)y * (float)posSize) / (float)graphicSize);

	UI_VScrollbarNodeSet(node, pos);
}

/**
 * @brief Draw the inventory of the base
 */
static void UI_BaseInventoryNodeDraw2 (uiNode_t* node, const objDef_t* highlightType)
{
	bool updateScroll = false;
	int visibleHeight = 0;
	int needHeight = 0;
	vec2_t screenPos;

	UI_GetNodeScreenPos(node, screenPos);
	UI_PushClipRect(screenPos[0], screenPos[1], node->box.size[0], node->box.size[1]);

	needHeight = UI_BaseInventoryNodeDrawItems(node, highlightType);

	UI_PopClipRect();
	visibleHeight = node->box.size[1];

#if 0
	R_FontDrawString("f_verysmall", ALIGN_UL,
		node->box.pos[0], node->box.pos[1], node->box.pos[0], node->box.pos[1],
		0,	0,	/* maxWidth/maxHeight */
		0, va("%i %i/%i", EXTRADATA(node).scrollCur, visibleRows, totalRows), 0, 0, nullptr, false, 0);
#endif

	/* Update display of scroll buttons if something changed. */
	if (visibleHeight != EXTRADATA(node).scrollY.viewSize || needHeight != EXTRADATA(node).scrollY.fullSize) {
		EXTRADATA(node).scrollY.fullSize = needHeight;
		EXTRADATA(node).scrollY.viewSize = visibleHeight;
		updateScroll = true;
	}
	if (EXTRADATA(node).scrollY.viewPos > needHeight - visibleHeight) {
		EXTRADATA(node).scrollY.viewPos = needHeight - visibleHeight;
		updateScroll = true;
	}
	if (EXTRADATA(node).scrollY.viewPos < 0) {
		EXTRADATA(node).scrollY.viewPos = 0;
		updateScroll = true;
	}

	if (updateScroll)
		UI_BaseInventoryNodeUpdateScroll(node);
}

/**
 * @brief Draw a grip container
 */
static void UI_ContainerNodeDrawGrid (uiNode_t *node, const objDef_t *highlightType)
{
	const invList_t *ic;
	vec3_t pos;

	UI_GetNodeAbsPos(node, pos);
	pos[2] = 0;

	for (ic = ui_inventory->c[EXTRADATA(node).container->id]; ic; ic = ic->next) {
		assert(ic->item.item);
		if (highlightType && INVSH_LoadableInWeapon(highlightType, ic->item.item))
			UI_DrawItem(node, pos, &ic->item, ic->x, ic->y, scale, colorLoadable);
		else
			UI_DrawItem(node, pos, &ic->item, ic->x, ic->y, scale, colorDefault);
	}
}

/**
 * @brief Called before loading. Used to set default attribute values
 */
void uiGeoscapeNode::onLoading (uiNode_t* node)
{
    Vector4Set(node->color, 1, 1, 1, 1);

    OBJZERO(EXTRADATA(node));
    EXTRADATA(node).angles[YAW] = GLOBE_ROTATE;
    EXTRADATA(node).center[0] = EXTRADATA(node).center[1] = 0.5;
    EXTRADATA(node).zoom = 1.0;
    Vector2Set(EXTRADATA(node).smoothFinal2DGeoscapeCenter, 0.5, 0.5);
    VectorSet(EXTRADATA(node).smoothFinalGlobeAngle, 0, GLOBE_ROTATE, 0);

    /* @todo: allocate this on a per node basis - and remove the global variable geoscapeData */
    EXTRADATA(node).geoscapeData = &geoscapeData;
    /* EXTRADATA(node).geoscapeData = Mem_AllocType(geoscapeData_t); */

    /** this is the data that is used with r_dayandnightTexture */
    EXTRADATA(node).r_dayandnightAlpha = Mem_AllocTypeN(byte, DAN_WIDTH * DAN_HEIGHT);

    r_dayandnightTexture = R_LoadImageData("***r_dayandnighttexture***", nullptr, DAN_WIDTH, DAN_HEIGHT, it_effect);
    r_radarTexture = R_LoadImageData("***r_radarTexture***", nullptr, RADAR_WIDTH, RADAR_HEIGHT, it_effect);
    r_xviTexture = R_LoadImageData("***r_xvitexture***", nullptr, XVI_WIDTH, XVI_HEIGHT, it_effect);
}

/**
 * @brief call when the mouse move is the node is captured
 * @todo we can remove the loop if we save the current element in the node
 */
void uiSelectBoxNode::onCapturedMouseMove (uiNode_t* node, int x, int y)
{
	UI_NodeAbsoluteToRelativePos(node, &x, &y);

	/* test bounded box */
	if (x < 0 || y < 0 || x > node->box.size[0] || y > node->box.size[1] * (EXTRADATA(node).count + 1)) {
		return;
	}

	int posy = node->box.size[1];
	for (uiNode_t* option = UI_AbstractOptionGetFirstOption(node); option; option = option->next) {
		if (option->invis)
			continue;
		OPTIONEXTRADATA(option).hovered = (posy <= y && y < posy + node->box.size[1]);
		posy += node->box.size[1];
	}
}

void uiModelNode::onCapturedMouseMove (uiNode_t* node, int x, int y)
{
	float* rotateAngles = EXTRADATA(node).angles;

	/* rotate a model */
	rotateAngles[YAW] -= ROTATE_SPEED * (x - oldMousePosX);
	rotateAngles[ROLL] += ROTATE_SPEED * (y - oldMousePosY);

	/* clamp the angles */
	rotateAngles[YAW] -= floor(rotateAngles[YAW] / 360.0) * 360.0;

	if (rotateAngles[ROLL] < 0.0)
		rotateAngles[ROLL] = 0.0;
	else if (rotateAngles[ROLL] > 180.0)
		rotateAngles[ROLL] = 180.0;

	oldMousePosX = x;
	oldMousePosY = y;
}