Rendering code placeholder added for 3D Bars.

Change-Id: I23d815dace8298d034c339c90e7bc0a0a4375d77
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>

1 files changed, 342 insertions, 0 deletions

diff --git a/src/datavis3d/engine/bars3dcontroller_p.h b/src/datavis3d/engine/bars3dcontroller_p.h
new file mode 100644
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+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtDataVis3D module.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+
+#ifndef Q3DBARSSHARED_p_H
+#define Q3DBARSSHARED_p_H
+
+#include "QtDataVis3D/qdatavis3dglobal.h"
+#include "QtDataVis3D/qdatavis3namespace.h"
+
+#include <QtCore/QSize>
+#include <QtCore/QObject>
+#include <QtGui/QOpenGLFunctions>
+#include <QtGui/QFont>
+
+#include <QWindow>
+
+class QOpenGLPaintDevice;
+class QPoint;
+class QSizeF;
+class QOpenGLShaderProgram;
+
+QT_DATAVIS3D_BEGIN_NAMESPACE
+
+class QDataItem;
+class QDataRow;
+class QDataSet;
+class ShaderHelper;
+class ObjectHelper;
+class TextureHelper;
+class Theme;
+class Drawer;
+class LabelItem;
+class Bars3dController;
+class Bars3dRenderer;
+
+class QT_DATAVIS3D_EXPORT Bars3dController : public QObject, public QOpenGLFunctions
+{
+    Q_OBJECT
+
+public:
+    enum SelectionType {
+        SelectionNone = 0,
+        SelectionBar,
+        SelectionRow,
+        SelectionColumn
+    };
+
+    enum MousePressType {
+        MouseNone = 0,
+        MouseOnScene,
+        MouseOnOverview,
+        MouseOnZoom,
+        MouseRotating,
+        MouseOnPinch
+    };
+
+    // TODO: Filter to the set of attributes to be moved to the model object.
+    // * All GL rendering only related attribs should be moved out of this public set.
+    // * All attribs that are modifiable from QML need to e in this set.
+
+    // Interaction related parameters
+    MousePressType m_mousePressed;
+    QPoint m_mousePos;
+    SelectionMode m_selectionMode;
+
+    // Visual parameters
+    QRect m_boundingRect;
+    QString m_objFile;
+    Theme *m_theme;
+    LabelTransparency m_labelTransparency;
+    QFont m_font;
+    bool m_gridEnabled;
+    bool m_bgrEnabled;
+    ShadowQuality m_shadowQuality;
+
+    // Data parameters
+    QPair<int, int> m_sampleCount;
+    QDataItem *m_selectedBar;
+    QDataSet *m_dataSet;
+    QString m_axisLabelX;
+    QString m_axisLabelZ;
+    QString m_axisLabelY;
+    QDataRow *m_zoomSelection;
+    GLint m_tickCount;
+    GLfloat m_tickStep;
+    bool m_negativeValues;
+
+    Bars3dRenderer *m_renderer;
+
+private:
+
+    // Internal attributes purely related to how the scene is drawn with GL.
+    bool m_xFlipped;
+    bool m_zFlipped;
+    bool m_yFlipped;
+    QRect m_sceneViewPort;
+    QRect m_zoomViewPort;
+    bool m_zoomActivated;
+    QOpenGLPaintDevice *m_paintDevice;
+    bool m_updateLabels;
+    bool m_isInitialized;
+    ShaderHelper *m_barShader;
+    ShaderHelper *m_depthShader;
+    ShaderHelper *m_selectionShader;
+    ShaderHelper *m_backgroundShader;
+    ShaderHelper *m_labelShader;
+    ObjectHelper *m_barObj;
+    ObjectHelper *m_backgroundObj;
+    ObjectHelper *m_gridLineObj;
+    ObjectHelper *m_labelObj;
+    TextureHelper *m_textureHelper;
+    Drawer *m_drawer;
+    GLuint m_bgrTexture;
+    GLuint m_depthTexture;
+    GLuint m_selectionTexture;
+    GLuint m_depthFrameBuffer;
+    GLuint m_selectionFrameBuffer;
+    GLuint m_selectionDepthBuffer;
+    GLfloat m_shadowQualityToShader;
+    GLuint m_fbohandle;
+    GLint m_zoomLevel;
+    GLfloat m_zoomAdjustment;
+    GLfloat m_horizontalRotation;
+    GLfloat m_verticalRotation;
+    QSizeF m_barThickness;
+    QSizeF m_barSpacing;
+    GLfloat m_heightNormalizer;
+    GLfloat m_yAdjustment;
+    GLfloat m_rowWidth;
+    GLfloat m_columnDepth;
+    GLfloat m_maxDimension;
+    GLfloat m_scaleX;
+    GLfloat m_scaleZ;
+    GLfloat m_scaleFactor;
+    GLfloat m_maxSceneSize;
+
+public:
+    explicit Bars3dController(QRect rect, GLuint fbohandle=0);
+    ~Bars3dController();
+
+    void initializeOpenGL();
+    void render();
+
+    // Add a row of data. Each new row is added to the front of the sample space, moving previous
+    // rows back (if sample space is more than one row deep)
+    void addDataRow(const QVector<GLfloat> &dataRow,
+                    const QString &labelRow = QString(),
+                    const QVector<QString> &labelsColumn = QVector<QString>());
+    // ownership of dataItems is transferred
+    void addDataRow(const QVector<QDataItem*> &dataRow,
+                    const QString &labelRow = QString(),
+                    const QVector<QString> &labelsColumn = QVector<QString>());
+    // ownership of dataRow is transferred
+    void addDataRow(QDataRow *dataRow);
+
+    // Add complete data set at a time, as a vector of data rows
+    void addDataSet(const QVector< QVector<GLfloat> > &data,
+                    const QVector<QString> &labelsRow = QVector<QString>(),
+                    const QVector<QString> &labelsColumn = QVector<QString>());
+
+    // ownership of dataItems is transferred
+    void addDataSet(const QVector< QVector<QDataItem*> > &data,
+                    const QVector<QString> &labelsRow = QVector<QString>(),
+                    const QVector<QString> &labelsColumn = QVector<QString>());
+    // ownership of dataSet is transferred
+    void addDataSet(QDataSet* dataSet);
+
+    // bar thickness, spacing between bars, and is spacing relative to thickness or absolute
+    // y -component sets the thickness/spacing of z -direction
+    // With relative 0.0f means side-to-side, 1.0f = one thickness in between
+    void setBarSpecs(QSizeF thickness = QSizeF(1.0f, 1.0f),
+                     QSizeF spacing = QSizeF(1.0f, 1.0f),
+                     bool relative = true);
+
+    // bar type; bars (=cubes), pyramids, cones, cylinders, etc.
+    void setBarType(BarStyle style, bool smooth = false);
+
+    // override bar type with own mesh
+    void setMeshFileName(const QString &objFileName);
+
+    // how many samples per row and column, and names for axes
+    void setupSampleSpace(int samplesRow, int samplesColumn,
+                          const QString &labelRow = QString(),
+                          const QString &labelColumn = QString(),
+                          const QString &labelHeight = QString());
+
+    // Select preset camera placement
+    void setCameraPreset(CameraPreset preset);
+
+    // Set camera rotation if you don't want to use the presets (in horizontal (-180...180) and
+    // vertical (0...90) (or (-90...90) if there are negative values) angles and distance in
+    // percentage (10...500))
+    void setCameraPosition(GLfloat horizontal, GLfloat vertical, GLint distance = 100);
+
+    // Set theme (bar colors, shaders, window color, background colors, light intensity and text
+    // colors are affected)
+    void setTheme(ColorTheme theme);
+
+    // Set color if you don't want to use themes. Set uniform to false if you want the (height)
+    // color to change from bottom to top
+    void setBarColor(QColor baseColor, QColor heightColor, QColor depthColor,
+                     bool uniform = true);
+
+    // Set tick count and step. Note; tickCount * step should be the maximum possible value of data
+    // set. Minimum is the absolute minimum possible value a bar can have. This is especially
+    // important to set if values can be negative.
+    void setTickCount(GLint tickCount, GLfloat step, GLfloat minimum = 0.0f);
+
+    // TODO: light placement API
+
+    // Size
+    const QSize size();
+    const QRect boundingRect();
+    void setBoundingRect(const QRect boundingRect);
+    void setWidth(const int width);
+    int width();
+    void setHeight(const int height);
+    int height();
+    void setX(const int x);
+    int x();
+    void setY(const int y);
+    int y();
+
+    // Change selection mode; single bar, bar and row, bar and column, or all
+    void setSelectionMode(SelectionMode mode);
+    SelectionMode selectionMode();
+
+    // Font size adjustment
+    void setFontSize(float fontsize);
+    float fontSize();
+
+    // Set font
+    void setFont(const QFont &font);
+    QFont font();
+
+    // Label transparency adjustment
+    void setLabelTransparency(LabelTransparency transparency);
+    LabelTransparency labelTransparency();
+
+    // Enable or disable background grid
+    void setGridEnabled(bool enable);
+    bool gridEnabled();
+
+    // Enable or disable background mesh
+    void setBackgroundEnabled(bool enable);
+    bool backgroundEnabled();
+
+    // Adjust shadow quality
+    void setShadowQuality(ShadowQuality quality);
+    ShadowQuality shadowQuality();
+
+#if defined(Q_OS_ANDROID)
+    void mouseDoubleClickEvent(QMouseEvent *event);
+    void touchEvent(QTouchEvent *event);
+#endif
+    void mousePressEvent(QMouseEvent *event);
+    void mouseReleaseEvent(QMouseEvent *event);
+    void mouseMoveEvent(QMouseEvent *event);
+    void wheelEvent(QWheelEvent *event);
+    void resizeNotify();
+
+    void loadBarMesh();
+    void loadBackgroundMesh();
+    void loadGridLineMesh();
+    void loadLabelMesh();
+    void initShaders(const QString &vertexShader, const QString &fragmentShader);
+    void initSelectionShader();
+    void initBackgroundShaders(const QString &vertexShader, const QString &fragmentShader);
+    void initLabelShaders(const QString &vertexShader, const QString &fragmentShader);
+    void initSelectionBuffer();
+#if !defined(QT_OPENGL_ES_2)
+    void initDepthShader();
+    void initDepthBuffer();
+#endif
+    void updateTextures();
+    void calculateSceneScalingFactors();
+    void calculateHeightAdjustment(const QPair<GLfloat, GLfloat> &limits);
+    SelectionType isSelected(GLint row, GLint bar, const QVector3D &selection);
+    void handleLimitChange();
+    void closeZoomMode();
+
+private:
+    void drawZoomScene();
+    void drawScene();
+    Q_DISABLE_COPY(Bars3dController)
+
+    friend class DeclarativeBars;
+    friend class DeclarativeBarsRenderer;
+};
+
+
+QT_DATAVIS3D_END_NAMESPACE
+
+#endif