mirror of
https://github.com/juce-framework/JUCE.git
synced 2026-01-10 23:44:24 +00:00
232 lines
10 KiB
C++
232 lines
10 KiB
C++
/*
|
|
==============================================================================
|
|
|
|
This file is part of the JUCE framework.
|
|
Copyright (c) Raw Material Software Limited
|
|
|
|
JUCE is an open source framework subject to commercial or open source
|
|
licensing.
|
|
|
|
By downloading, installing, or using the JUCE framework, or combining the
|
|
JUCE framework with any other source code, object code, content or any other
|
|
copyrightable work, you agree to the terms of the JUCE End User Licence
|
|
Agreement, and all incorporated terms including the JUCE Privacy Policy and
|
|
the JUCE Website Terms of Service, as applicable, which will bind you. If you
|
|
do not agree to the terms of these agreements, we will not license the JUCE
|
|
framework to you, and you must discontinue the installation or download
|
|
process and cease use of the JUCE framework.
|
|
|
|
JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
|
|
JUCE Privacy Policy: https://juce.com/juce-privacy-policy
|
|
JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
|
|
|
|
Or:
|
|
|
|
You may also use this code under the terms of the AGPLv3:
|
|
https://www.gnu.org/licenses/agpl-3.0.en.html
|
|
|
|
THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
|
|
WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
|
|
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
|
|
|
|
==============================================================================
|
|
*/
|
|
|
|
namespace juce
|
|
{
|
|
|
|
/**
|
|
Container that handles geometry for grid layouts (fixed columns and rows) using a set of declarative rules.
|
|
|
|
Implemented from the `CSS Grid Layout` specification as described at:
|
|
https://css-tricks.com/snippets/css/complete-guide-grid/
|
|
|
|
@see GridItem
|
|
|
|
@tags{GUI}
|
|
*/
|
|
class JUCE_API Grid final
|
|
{
|
|
public:
|
|
//==============================================================================
|
|
/** A size in pixels */
|
|
struct Px final
|
|
{
|
|
explicit Px (float p) : pixels (static_cast<long double> (p)) { /*sta (p >= 0.0f);*/ }
|
|
explicit Px (int p) : pixels (static_cast<long double> (p)) { /*sta (p >= 0.0f);*/ }
|
|
explicit constexpr Px (long double p) : pixels (p) {}
|
|
explicit constexpr Px (unsigned long long p) : pixels (static_cast<long double> (p)) {}
|
|
|
|
long double pixels;
|
|
};
|
|
|
|
/** A fractional ratio integer */
|
|
struct Fr final
|
|
{
|
|
explicit Fr (int f) : fraction (static_cast<unsigned long long> (f)) {}
|
|
explicit constexpr Fr (unsigned long long p) : fraction (p) {}
|
|
|
|
unsigned long long fraction;
|
|
};
|
|
|
|
//==============================================================================
|
|
/** Represents a track. */
|
|
struct TrackInfo final
|
|
{
|
|
/** Creates a track with auto dimension. */
|
|
TrackInfo() noexcept;
|
|
|
|
TrackInfo (Px sizeInPixels) noexcept;
|
|
TrackInfo (Fr fractionOfFreeSpace) noexcept;
|
|
|
|
TrackInfo (Px sizeInPixels, const String& endLineNameToUse) noexcept;
|
|
TrackInfo (Fr fractionOfFreeSpace, const String& endLineNameToUse) noexcept;
|
|
|
|
TrackInfo (const String& startLineNameToUse, Px sizeInPixels) noexcept;
|
|
TrackInfo (const String& startLineNameToUse, Fr fractionOfFreeSpace) noexcept;
|
|
|
|
TrackInfo (const String& startLineNameToUse, Px sizeInPixels, const String& endLineNameToUse) noexcept;
|
|
TrackInfo (const String& startLineNameToUse, Fr fractionOfFreeSpace, const String& endLineNameToUse) noexcept;
|
|
|
|
bool isAuto() const noexcept { return hasKeyword; }
|
|
bool isFractional() const noexcept { return isFraction; }
|
|
bool isPixels() const noexcept { return ! isFraction; }
|
|
const String& getStartLineName() const noexcept { return startLineName; }
|
|
const String& getEndLineName() const noexcept { return endLineName; }
|
|
|
|
/** Get the track's size - which might mean an absolute pixels value or a fractional ratio. */
|
|
float getSize() const noexcept { return size; }
|
|
|
|
private:
|
|
friend class Grid;
|
|
float getAbsoluteSize (float relativeFractionalUnit) const;
|
|
|
|
float size = 0; // Either a fraction or an absolute size in pixels
|
|
bool isFraction = false;
|
|
bool hasKeyword = false;
|
|
|
|
String startLineName, endLineName;
|
|
};
|
|
|
|
//==============================================================================
|
|
/** Possible values for the justifyItems property. */
|
|
enum class JustifyItems : int
|
|
{
|
|
start = 0, /**< Content inside the item is justified towards the left. */
|
|
end, /**< Content inside the item is justified towards the right. */
|
|
center, /**< Content inside the item is justified towards the center. */
|
|
stretch /**< Content inside the item is stretched from left to right. */
|
|
};
|
|
|
|
/** Possible values for the alignItems property. */
|
|
enum class AlignItems : int
|
|
{
|
|
start = 0, /**< Content inside the item is aligned towards the top. */
|
|
end, /**< Content inside the item is aligned towards the bottom. */
|
|
center, /**< Content inside the item is aligned towards the center. */
|
|
stretch /**< Content inside the item is stretched from top to bottom. */
|
|
};
|
|
|
|
/** Possible values for the justifyContent property. */
|
|
enum class JustifyContent
|
|
{
|
|
start, /**< Items are justified towards the left of the container. */
|
|
end, /**< Items are justified towards the right of the container. */
|
|
center, /**< Items are justified towards the center of the container. */
|
|
stretch, /**< Items are stretched from left to right of the container. */
|
|
spaceAround, /**< Items are evenly spaced along the row with spaces between them. */
|
|
spaceBetween, /**< Items are evenly spaced along the row with spaces around them. */
|
|
spaceEvenly /**< Items are evenly spaced along the row with even amount of spaces between them. */
|
|
};
|
|
|
|
/** Possible values for the alignContent property. */
|
|
enum class AlignContent
|
|
{
|
|
start, /**< Items are aligned towards the top of the container. */
|
|
end, /**< Items are aligned towards the bottom of the container. */
|
|
center, /**< Items are aligned towards the center of the container. */
|
|
stretch, /**< Items are stretched from top to bottom of the container. */
|
|
spaceAround, /**< Items are evenly spaced along the column with spaces between them. */
|
|
spaceBetween, /**< Items are evenly spaced along the column with spaces around them. */
|
|
spaceEvenly /**< Items are evenly spaced along the column with even amount of spaces between them. */
|
|
};
|
|
|
|
/** Possible values for the autoFlow property. */
|
|
enum class AutoFlow
|
|
{
|
|
row, /**< Fills the grid by adding rows of items. */
|
|
column, /**< Fills the grid by adding columns of items. */
|
|
rowDense, /**< Fills the grid by adding rows of items and attempts to fill in gaps. */
|
|
columnDense /**< Fills the grid by adding columns of items and attempts to fill in gaps. */
|
|
};
|
|
|
|
|
|
//==============================================================================
|
|
/** Creates an empty Grid container with default parameters. */
|
|
Grid() = default;
|
|
|
|
//==============================================================================
|
|
/** Specifies the alignment of content inside the items along the rows. */
|
|
JustifyItems justifyItems = JustifyItems::stretch;
|
|
|
|
/** Specifies the alignment of content inside the items along the columns. */
|
|
AlignItems alignItems = AlignItems::stretch;
|
|
|
|
/** Specifies the alignment of items along the rows. */
|
|
JustifyContent justifyContent = JustifyContent::stretch;
|
|
|
|
/** Specifies the alignment of items along the columns. */
|
|
AlignContent alignContent = AlignContent::stretch;
|
|
|
|
/** Specifies how the auto-placement algorithm places items. */
|
|
AutoFlow autoFlow = AutoFlow::row;
|
|
|
|
|
|
//==============================================================================
|
|
/** The set of column tracks to lay out. */
|
|
Array<TrackInfo> templateColumns;
|
|
|
|
/** The set of row tracks to lay out. */
|
|
Array<TrackInfo> templateRows;
|
|
|
|
/** Template areas */
|
|
StringArray templateAreas;
|
|
|
|
/** The row track for auto dimension. */
|
|
TrackInfo autoRows;
|
|
|
|
/** The column track for auto dimension. */
|
|
TrackInfo autoColumns;
|
|
|
|
/** The gap in pixels between columns. */
|
|
Px columnGap { 0 };
|
|
/** The gap in pixels between rows. */
|
|
Px rowGap { 0 };
|
|
|
|
/** Sets the gap between rows and columns in pixels. */
|
|
void setGap (Px sizeInPixels) noexcept { rowGap = columnGap = sizeInPixels; }
|
|
|
|
//==============================================================================
|
|
/** The set of items to lay-out. */
|
|
Array<GridItem> items;
|
|
|
|
//==============================================================================
|
|
/** Lays-out the grid's items within the given rectangle. */
|
|
void performLayout (Rectangle<int>);
|
|
|
|
//==============================================================================
|
|
/** Returns the number of columns. */
|
|
int getNumberOfColumns() const noexcept { return templateColumns.size(); }
|
|
/** Returns the number of rows. */
|
|
int getNumberOfRows() const noexcept { return templateRows.size(); }
|
|
|
|
private:
|
|
//==============================================================================
|
|
struct Helpers;
|
|
};
|
|
|
|
constexpr Grid::Px operator""_px (long double px) { return Grid::Px { px }; }
|
|
constexpr Grid::Px operator""_px (unsigned long long px) { return Grid::Px { px }; }
|
|
constexpr Grid::Fr operator""_fr (unsigned long long fr) { return Grid::Fr { fr }; }
|
|
|
|
} // namespace juce
|