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FormSpec: Add position and anchor elements (#5284)

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adelcoding1 authored and nerzhul committed Mar 4, 2017
1 parent 22df959 commit 6de83a2756316653ed67b23bbeb0fb43aa2a68c6
Showing with 109 additions and 8 deletions.
  1. +10 −0 doc/lua_api.txt
  2. +93 −8 src/guiFormSpecMenu.cpp
  3. +6 −0 src/guiFormSpecMenu.h
@@ -1522,6 +1522,16 @@ examples.
* `fixed_size`: `true`/`false` (optional)
* deprecated: `invsize[<W>,<H>;]`

#### `position[<X>,<Y>]`
* Define the position of the formspec
* A value between 0.0 and 1.0 represents a position inside the screen
* The default value is the center of the screen (0.5, 0.5)

#### `anchor[<X>,<Y>]`
* Define the anchor of the formspec
* A value between 0.0 and 1.0 represents an anchor inside the formspec
* The default value is the center of the formspec (0.5, 0.5)

#### `container[<X>,<Y>]`
* Start of a container block, moves all physical elements in the container by (X, Y)
* Must have matching container_end
@@ -1706,6 +1706,74 @@ bool GUIFormSpecMenu::parseSizeDirect(parserData* data, std::string element)
return true;
}

bool GUIFormSpecMenu::parsePositionDirect(parserData *data, const std::string &element)
{
if (element.empty())
return false;

std::vector<std::string> parts = split(element, '[');

if (parts.size() != 2)
return false;

std::string type = trim(parts[0]);
std::string description = trim(parts[1]);

if (type != "position")
return false;

parsePosition(data, description);

return true;
}

void GUIFormSpecMenu::parsePosition(parserData *data, const std::string &element)
{
std::vector<std::string> parts = split(element, ',');

if (parts.size() == 2) {
data->offset.X = stof(parts[0]);
data->offset.Y = stof(parts[1]);
return;
}

errorstream << "Invalid position element (" << parts.size() << "): '" << element << "'" << std::endl;
}

bool GUIFormSpecMenu::parseAnchorDirect(parserData *data, const std::string &element)
{
if (element.empty())
return false;

std::vector<std::string> parts = split(element, '[');

if (parts.size() != 2)
return false;

std::string type = trim(parts[0]);
std::string description = trim(parts[1]);

if (type != "anchor")
return false;

parseAnchor(data, description);

return true;
}

void GUIFormSpecMenu::parseAnchor(parserData *data, const std::string &element)
{
std::vector<std::string> parts = split(element, ',');

if (parts.size() == 2) {
data->anchor.X = stof(parts[0]);
data->anchor.Y = stof(parts[1]);
return;
}

errorstream << "Invalid anchor element (" << parts.size() << "): '" << element << "'" << std::endl;
}

void GUIFormSpecMenu::parseElement(parserData* data, std::string element)
{
//some prechecks
@@ -1917,6 +1985,8 @@ void GUIFormSpecMenu::regenerateGui(v2u32 screensize)

mydata.size= v2s32(100,100);
mydata.screensize = screensize;
mydata.offset = v2f32(0.5f, 0.5f);
mydata.anchor = v2f32(0.5f, 0.5f);

// Base position of contents of form
mydata.basepos = getBasePos();
@@ -1983,6 +2053,21 @@ void GUIFormSpecMenu::regenerateGui(v2u32 screensize)
}
}

/* "position" element is always after "size" element if it used */
for (; i< elements.size(); i++) {
if (!parsePositionDirect(&mydata, elements[i])) {
break;
}
}

/* "anchor" element is always after "position" (or "size" element) if it used */
for (; i< elements.size(); i++) {
if (!parseAnchorDirect(&mydata, elements[i])) {
break;
}
}


if (mydata.explicit_size) {
// compute scaling for specified form size
if (m_lock) {
@@ -2066,10 +2151,10 @@ void GUIFormSpecMenu::regenerateGui(v2u32 screensize)
padding.Y*2+spacing.Y*(mydata.invsize.Y-1.0)+imgsize.Y + m_btn_height*2.0/3.0
);
DesiredRect = mydata.rect = core::rect<s32>(
mydata.screensize.X/2 - mydata.size.X/2 + offset.X,
mydata.screensize.Y/2 - mydata.size.Y/2 + offset.Y,
mydata.screensize.X/2 + mydata.size.X/2 + offset.X,
mydata.screensize.Y/2 + mydata.size.Y/2 + offset.Y
(s32)((f32)mydata.screensize.X * mydata.offset.X) - (s32)(mydata.anchor.X * (f32)mydata.size.X) + offset.X,
(s32)((f32)mydata.screensize.Y * mydata.offset.Y) - (s32)(mydata.anchor.Y * (f32)mydata.size.Y) + offset.Y,
(s32)((f32)mydata.screensize.X * mydata.offset.X) + (s32)((1.0 - mydata.anchor.X) * (f32)mydata.size.X) + offset.X,
(s32)((f32)mydata.screensize.Y * mydata.offset.Y) + (s32)((1.0 - mydata.anchor.Y) * (f32)mydata.size.Y) + offset.Y
);
} else {
// Non-size[] form must consist only of text fields and
@@ -2078,10 +2163,10 @@ void GUIFormSpecMenu::regenerateGui(v2u32 screensize)
m_font = g_fontengine->getFont();
m_btn_height = font_line_height(m_font) * 0.875;
DesiredRect = core::rect<s32>(
mydata.screensize.X/2 - 580/2,
mydata.screensize.Y/2 - 300/2,
mydata.screensize.X/2 + 580/2,
mydata.screensize.Y/2 + 300/2
(s32)((f32)mydata.screensize.X * mydata.offset.X) - (s32)(mydata.anchor.X * 580.0),
(s32)((f32)mydata.screensize.Y * mydata.offset.Y) - (s32)(mydata.anchor.Y * 300.0),
(s32)((f32)mydata.screensize.X * mydata.offset.X) + (s32)((1.0 - mydata.anchor.X) * 580.0),
(s32)((f32)mydata.screensize.Y * mydata.offset.Y) + (s32)((1.0 - mydata.anchor.Y) * 300.0)
);
}
recalculateAbsolutePosition(false);
@@ -447,6 +447,8 @@ class GUIFormSpecMenu : public GUIModalMenu
bool explicit_size;
v2f invsize;
v2s32 size;
v2f32 offset;
v2f32 anchor;
core::rect<s32> rect;
v2s32 basepos;
v2u32 screensize;
@@ -502,6 +504,10 @@ class GUIFormSpecMenu : public GUIModalMenu
bool parseVersionDirect(std::string data);
bool parseSizeDirect(parserData* data, std::string element);
void parseScrollBar(parserData* data, std::string element);
bool parsePositionDirect(parserData *data, const std::string &element);
void parsePosition(parserData *data, const std::string &element);
bool parseAnchorDirect(parserData *data, const std::string &element);
void parseAnchor(parserData *data, const std::string &element);

void tryClose();

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