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Thirdparty/Pangolin/include/pangolin/handler/handler_image.h

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+/* This file is part of the Pangolin Project.
+ * http://github.com/stevenlovegrove/Pangolin
+ *
+ * Copyright (c) 2013 Steven Lovegrove
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#pragma once
+
+#include <pangolin/image/image_utils.h>
+#include <pangolin/display/viewport.h>
+#include <pangolin/display/view.h>
+#include <pangolin/handler/handler.h>
+#include <pangolin/plot/range.h>
+#include <pangolin/gl/gl.h>
+
+#include <functional>
+
+namespace pangolin
+{
+
+class ImageViewHandler : public Handler
+{
+public:
+    struct EventData {
+        EventData(View& v, ImageViewHandler& h) : view(v), handler(h) {}
+        View& view;
+        ImageViewHandler& handler;
+    };
+
+    struct OnSelectionEventData : public EventData {
+        OnSelectionEventData(View& v, ImageViewHandler& h, bool dragging)
+            : EventData(v,h), dragging(dragging) {}
+        bool dragging;
+    };
+
+    typedef std::function<void(OnSelectionEventData)> OnSelectionCallbackFn;
+
+    // Default constructor: User must call SetDimensions() once image dimensions are known.
+    // Default range is [0,1] in x and y.
+    ImageViewHandler();
+
+    // View ranges store extremes of image (boundary of pixels)
+    // in 'discrete' coords, where 0,0 is center of top-left pixel.
+    ImageViewHandler(size_t w, size_t h);
+
+    void SetDimensions(size_t w, size_t h);
+
+    void UpdateView();
+
+    void glSetViewOrtho();
+
+    void glRenderTexture(pangolin::GlTexture& tex);
+    void glRenderTexture(GLuint tex, GLint width, GLint height);
+
+    void glRenderOverlay();
+
+    void ScreenToImage(Viewport& v, float xpix, float ypix, float& ximg, float& yimg);
+
+    void ImageToScreen(Viewport& v, float ximg, float yimg, float& xpix, float& ypix);
+
+    bool UseNN() const;
+
+    bool& UseNN();
+
+    bool& FlipTextureX();
+
+    bool& FlipTextureY();
+
+    pangolin::XYRangef& GetViewToRender();
+
+    float GetViewScale();
+
+    pangolin::XYRangef& GetView();
+
+    pangolin::XYRangef& GetDefaultView();
+
+    pangolin::XYRangef& GetSelection();
+
+    void GetHover(float& x, float& y);
+
+    void SetView(const pangolin::XYRangef& range);
+
+    void SetViewSmooth(const pangolin::XYRangef& range);
+
+    void ScrollView(float x, float y);
+
+    void ScrollViewSmooth(float x, float y);
+
+    void ScaleView(float x, float y, float cx, float cy);
+
+    void ScaleViewSmooth(float x, float y, float cx, float cy);
+
+    void ResetView();
+
+    ///////////////////////////////////////////////////////
+    /// pangolin::Handler
+    ///////////////////////////////////////////////////////
+
+    void Keyboard(View&, unsigned char key, int /*x*/, int /*y*/, bool pressed) override;
+
+    void Mouse(View& view, pangolin::MouseButton button, int x, int y, bool pressed, int button_state) override;
+
+    void MouseMotion(View& view, int x, int y, int button_state) override;
+
+    void PassiveMouseMotion(View&, int /*x*/, int /*y*/, int /*button_state*/) override;
+
+    void Special(View& view, pangolin::InputSpecial inType, float x, float y, float p1, float p2, float /*p3*/, float /*p4*/, int /*button_state*/) override;
+
+    ///////////////////////////////////////////////////////
+    /// Callbacks
+    ///////////////////////////////////////////////////////
+
+    OnSelectionCallbackFn OnSelectionCallback;
+
+protected:
+    void FixSelection(XYRangef& sel);
+
+    void AdjustScale();
+
+    void AdjustTranslation();
+
+    static ImageViewHandler* to_link;
+    static float animate_factor;
+
+    ImageViewHandler* linked_view_handler;
+
+    pangolin::XYRangef rview_default;
+    pangolin::XYRangef rview_max;
+    pangolin::XYRangef rview;
+    pangolin::XYRangef target;
+    pangolin::XYRangef selection;
+
+    float hover_img[2];
+    int last_mouse_pos[2];
+
+    bool use_nn;
+    bool flipTextureX;
+    bool flipTextureY;
+};
+
+}