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GTK will not up front know how to correctly calculate a size, since it will not be able to reliably predict the constraints that may exist where it will be mapped. Thus, to handle this, calculate the size of the toplevel by having GDK emitting a signal called 'compute-size' that will contain information needed for computing a toplevel window size. This signal may be emitted at any time, e.g. during gdk_toplevel_present(), or spontaneously if constraints change. This also drops the max size from the toplevel layout, while moving the min size from the toplevel layout struct to the struct passed via the signal, This needs changes to a test case where we make sure we process GDK_CONFIGURE etc, which means we also needs to show the window and process all pending events in the test-focus-chain test case.
120 lines
3.8 KiB
C
120 lines
3.8 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 2020 Red Hat
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "config.h"
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#include "gdktoplevelsizeprivate.h"
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/**
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* SECTION:gdktoplevelsize
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* @Title: GdkToplevelSize
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* @Short_description: Information for computing toplevel size
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*
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* The GdkToplevelSIze struct contains information that may be useful
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* for users of GdkToplevel to compute a surface size. It also carries
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* information back with the computational result.
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*/
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G_DEFINE_POINTER_TYPE (GdkToplevelSize, gdk_toplevel_size)
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#define UNCONFIGURED_WIDTH 400
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#define UNCONFIGURED_HEIGHT 300
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void
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gdk_toplevel_size_init (GdkToplevelSize *size,
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int bounds_width,
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int bounds_height)
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{
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*size = (GdkToplevelSize) { 0 };
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size->bounds_width = bounds_width;
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size->bounds_height = bounds_height;
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size->width = UNCONFIGURED_WIDTH;
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size->height = UNCONFIGURED_HEIGHT;
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}
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/**
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* gdk_toplevel_size_get_bounds:
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* @size: a #GdkToplevelSize
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* @bounds_width: (out): return location for width
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* @bounds_height: (out): return location for height
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*
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* Retrieves the bounds the toplevel is placed within.
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*
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* The bounds represent the largest size a toplevel may have while still being
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* able to fit within some type of boundery. Depending on the backend, this may
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* be equivalent to the dimensions of the work area or the monitor on which the
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* window is being presented on, or something else that limits the way a
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* toplevel can be presented.
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*/
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void
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gdk_toplevel_size_get_bounds (GdkToplevelSize *size,
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int *bounds_width,
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int *bounds_height)
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{
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g_return_if_fail (bounds_width);
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g_return_if_fail (bounds_height);
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*bounds_width = size->bounds_width;
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*bounds_height = size->bounds_height;
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}
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/**
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* gdk_toplevel_size_set_size:
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* @size: a #GdkToplevelSize
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* @width: the width
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* @height: the height
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*
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* Sets the size the toplevel prefers to be resized to. The size should be
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* within the bounds (see gdk_toplevel_size_get_bounds()). The set size should
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* be considered as a hint, and should not be assumed to be respected by the
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* windowing system, or backend.
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*/
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void
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gdk_toplevel_size_set_size (GdkToplevelSize *size,
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int width,
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int height)
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{
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size->width = width;
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size->height = height;
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}
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/**
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* gdk_toplevel_size_set_min_size:
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* @size: a #GdkToplevelSize
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* @min_width: the minimum width
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* @min_height: the minimum height
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*
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* The minimum size corresponds to the limitations the toplevel can be shrunk
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* to, without resulting in incorrect painting. A user of a #GdkToplevel should
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* calculate these given both the existing size, and the bounds retrieved from
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* the #GdkToplevelSize object.
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*
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* The minimum size should be within the bounds (see
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* gdk_toplevel_size_get_bounds()).
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*/
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void
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gdk_toplevel_size_set_min_size (GdkToplevelSize *size,
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int min_width,
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int min_height)
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{
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size->min_width = min_width;
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size->min_height = min_height;
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}
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