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Add window hints for initial position

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This adds window hints for the initial position, in screen coordinates,
of a window.  The special value GLFW_ANY_POSITION means the window
manager will be allowed to position the window.

It is not possible to set window positions on Wayland and GLFW will
always behave as if these hints are set to GLFW_ANY_POSITION.

Fixes #1603
Fixes #1747
This commit is contained in:
Camilla Löwy
2021-10-26 14:25:03 +02:00
parent 7d73629e50
commit 0f9a9578f3
12 changed files with 138 additions and 31 deletions
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docs/news.dox
+11
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@@ -76,6 +76,14 @@ function pointers corresponding to the standard library functions `malloc`,
For more information see @ref init_allocator.
@subsubsection features_34_position_hint Window hints for initial position
GLFW now provides the @ref GLFW_POSITION_X and @ref GLFW_POSITION_Y window hints for
specifying the initial position of the window. This removes the need to create a hidden
window, move it and then show it. The default value of these hints is
`GLFW_ANY_POSITION`, which selects the previous behavior.
@subsubsection features_34_win32_keymenu Support for keyboard access to Windows window menu
GLFW now provides the
@@ -243,6 +251,9 @@ then GLFW will fail to initialize.
- @ref GLFW_ANGLE_PLATFORM_TYPE_METAL
- @ref GLFW_X11_XCB_VULKAN_SURFACE
- @ref GLFW_CURSOR_CAPTURED
- @ref GLFW_POSITION_X
- @ref GLFW_POSITION_Y
- @ref GLFW_ANY_POSITION
@section news_archive Release notes for earlier versions
docs/window.dox
+24 -1
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@@ -256,6 +256,14 @@ This is only supported for undecorated windows. Decorated windows with this
enabled will behave differently between platforms. Possible values are
`GLFW_TRUE` and `GLFW_FALSE`.
@anchor GLFW_POSITION_X
@anchor GLFW_POSITION_Y
__GLFW_POSITION_X__ and __GLFW_POSITION_Y__ specify the desired initial position
of the window. The window manager may modify or ignore these coordinates. If
either or both of these hints are set to `GLFW_ANY_POSITION` then the window
manager will position the window where it thinks the user will prefer it.
Possible values are any valid screen coordinates and `GLFW_ANY_POSITION`.
@subsubsection window_hints_fb Framebuffer related hints
@@ -516,6 +524,8 @@ GLFW_TRANSPARENT_FRAMEBUFFER | `GLFW_FALSE` | `GLFW_TRUE` or `GL
GLFW_FOCUS_ON_SHOW | `GLFW_TRUE` | `GLFW_TRUE` or `GLFW_FALSE`
GLFW_SCALE_TO_MONITOR | `GLFW_FALSE` | `GLFW_TRUE` or `GLFW_FALSE`
GLFW_MOUSE_PASSTHROUGH | `GLFW_FALSE` | `GLFW_TRUE` or `GLFW_FALSE`
GLFW_POSITION_X | `GLFW_ANY_POSITION` | Any valid screen x-coordinate or `GLFW_ANY_POSITION`
GLFW_POSITION_Y | `GLFW_ANY_POSITION` | Any valid screen y-coordinate or `GLFW_ANY_POSITION`
GLFW_RED_BITS | 8 | 0 to `INT_MAX` or `GLFW_DONT_CARE`
GLFW_GREEN_BITS | 8 | 0 to `INT_MAX` or `GLFW_DONT_CARE`
GLFW_BLUE_BITS | 8 | 0 to `INT_MAX` or `GLFW_DONT_CARE`
@@ -798,7 +808,20 @@ are undefined if they conflict.
@subsection window_pos Window position
The position of a windowed-mode window can be changed with @ref
By default, the window manager chooses the position of new windowed mode
windows, based on its size and which monitor the user appears to be working on.
This is most often the right choice. If you need to create a window at
a specific position, you can set the desired position with the @ref
GLFW_POSITION_X and @ref GLFW_POSITION_Y window hints.
@code
glfwWindowHint(GLFW_POSITION_X, 70);
glfwWindowHint(GLFW_POSITION_Y, 83);
@endcode
To restore the previous behavior, set these hints to `GLFW_ANY_POSITION`.
The position of a windowed mode window can be changed with @ref
glfwSetWindowPos. This moves the window so that the upper-left corner of its
content area has the specified [screen coordinates](@ref coordinate_systems).
The window system may put limitations on window placement.