71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// Licensed under the MIT License.
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#ifndef K4AWINDOWSIZEHELPERS_H
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#define K4AWINDOWSIZEHELPERS_H
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// System headers
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//
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// Library headers
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//
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#include "k4aimgui_all.h"
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// Project headers
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//
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namespace k4aviewer
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{
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inline float GetStandardVerticalSliderWidth()
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{
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// Width of the slider is 1 character, plus half the normal padding
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//
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return ImGui::GetFont()->FontSize + ImGui::GetStyle().FramePadding.x;
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}
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inline float GetTitleBarHeight()
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{
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return ImGui::GetFont()->FontSize + ImGui::GetStyle().FramePadding.y * 2;
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}
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inline float GetDefaultButtonHeight()
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{
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return ImGui::GetFont()->FontSize + ImGui::GetStyle().FramePadding.y * 2 + ImGui::GetStyle().ItemSpacing.y;
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}
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// Gets the maximum dimensions that an image of size imageDimensions can be scaled to in order
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// to fit in a window with imageMaxSize available space while maintaining its aspect ratio.
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// imageMaxSize is expected to include space for window padding, but does not account for the
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// title bar or any any potential other widgets in your window, so you'll need to subtract those
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// from imageMaxSize, if applicable.
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//
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inline ImVec2 GetMaxImageSize(const ImVec2 imageDimensions, const ImVec2 imageMaxSize)
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{
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const float sourceAspectRatio = imageDimensions.x / imageDimensions.y;
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const float verticalPadding = ImGui::GetStyle().WindowPadding.y * 2;
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const float horizontalPadding = ImGui::GetStyle().WindowPadding.x * 2;
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const float horizontalMaxSize = imageMaxSize.x - horizontalPadding;
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const float verticalMaxSize = imageMaxSize.y - verticalPadding;
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ImVec2 displayDimensions;
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if (horizontalMaxSize / sourceAspectRatio <= verticalMaxSize)
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{
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displayDimensions.x = horizontalMaxSize;
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displayDimensions.y = horizontalMaxSize / sourceAspectRatio;
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}
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else
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{
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displayDimensions.x = verticalMaxSize * sourceAspectRatio;
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displayDimensions.y = verticalMaxSize;
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}
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displayDimensions.x = std::max(1.f, displayDimensions.x);
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displayDimensions.y = std::max(1.f, displayDimensions.y);
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return displayDimensions;
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}
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} // namespace k4aviewer
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#endif
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