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https://gitlab.com/kicad/code/kicad.git
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567bdd9b9d
First, add automatic detection of toolkit DPI scaling options. For now, this is, in order, * Check the GDK_SCALE option under GTK+ (users can set this to force the scaling) * Check the value from WX's GetContentScalingFactor(). This will start to work correctly from WX 3.1 and GTK+ 3.10. Then, add a user-settable override in the main prefs panel, next to the icon scaling. This is independent of the icon scaling options. DPI handling is performed in a standalone class, so they can be shared between the prefs UI and the OpenGL backend easily. Also means Cairo could use the same interface in future. Also adjust the OpenGL grid drawing code to use the computed scale factor, which avoids over-thick grids in scaled environments (the user can manually thicken the grid if wanted). Fixes: lp:1797308 * https://bugs.launchpad.net/kicad/+bug/1797308
102 lines
3.4 KiB
C++
102 lines
3.4 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2019 KiCad Developers, see CHANGELOG.TXT for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef DPI_SCALING__H
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#define DPI_SCALING__H
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#include <wx/config.h>
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#include <wx/window.h>
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/**
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* Class to handle configuration and automatic determination of the DPI
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* scale to use for canvases. This has several sources and the availability of
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* some of them are platform dependent.
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*/
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class DPI_SCALING
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{
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public:
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/**
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* Construct a DPI scale provider.
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*
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* @param aConfig the config store to check for a user value (can be nullptr,
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* in which case on automatically determined values are considered)
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* @param aWindow a WX window to use for automatic DPI determination
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* @return the scaling factor (1.0 = no scaling)
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*/
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DPI_SCALING( wxConfigBase* aConfig, const wxWindow* aWindow );
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/**
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* Get the DPI scale from all known sources in order:
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*
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* * user config, if given
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* * user's environment variables, if set and according to platform
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* * WX's internal determination of the DPI scaling (WX > 3.1)
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*/
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double GetScaleFactor() const;
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/**
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* Is the current value auto scaled, or is it user-set in the config
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*/
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bool GetCanvasIsAutoScaled() const;
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/**
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* Set the common DPI config in a given config object
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*
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* The encoding of the automatic/manual nature of the config is handled internally.
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*
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* @param aAuto store a value meaning "no user-set scale"
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* @param aValue the value to store (ignored if aAuto set)
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*/
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void SetDpiConfig( bool aAuto, double aValue );
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/*
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* Get the maximum scaling factor that should be presented to the user.
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* This is only advisory, it has no real technical use other than for validation.
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*/
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static double GetMaxScaleFactor();
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/*
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* Get the minimum scaling factor that should be presented to the user.
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* This is only advisory, it has no real technical use other than for validation.
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*/
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static double GetMinScaleFactor();
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/**
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* Get the "default" scaling factor to use if not other config is available
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*/
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static double GetDefaultScaleFactor();
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private:
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/**
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* The configuration object to use to get/set user setting. nullptr
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* if only automatic options are wanted
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*/
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wxConfigBase* m_config;
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/**
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* The WX window to use for WX's automatic DPI checking
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*/
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const wxWindow* m_window;
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};
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#endif // DPI_SCALING__H
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