Blame view

build6/epsilon-master/apps/shared/function_graph_view.cpp 2.84 KB
6663b6c9   adorian   projet complet av...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
  #include "function_graph_view.h"
  #include <assert.h>
  #include <cmath>
  #include <float.h>
  using namespace Poincare;
  
  namespace Shared {
  
  FunctionGraphView::FunctionGraphView(InteractiveCurveViewRange * graphRange,
    CurveViewCursor * cursor, BannerView * bannerView, View * cursorView) :
    CurveView(graphRange, cursor, bannerView, cursorView),
    m_selectedFunction(nullptr),
    m_highlightedStart(NAN),
    m_highlightedEnd(NAN),
    m_shouldColorHighlighted(false),
    m_xLabels{},
    m_yLabels{},
    m_context(nullptr)
  {
  }
  
  void FunctionGraphView::drawRect(KDContext * ctx, KDRect rect) const {
    ctx->fillRect(rect, KDColorWhite);
    drawGrid(ctx, rect);
    drawAxes(ctx, rect, Axis::Horizontal);
    drawAxes(ctx, rect, Axis::Vertical);
    drawLabels(ctx, rect, Axis::Horizontal, true);
    drawLabels(ctx, rect, Axis::Vertical, true);
  }
  
  void FunctionGraphView::setContext(Context * context) {
    m_context = context;
  }
  
  Context * FunctionGraphView::context() const {
    return m_context;
  }
  
  void FunctionGraphView::selectFunction(Function * function) {
    if (m_selectedFunction != function) {
      m_selectedFunction = function;
      reloadBetweenBounds(m_highlightedStart, m_highlightedEnd);
    }
  }
  
  void FunctionGraphView::setAreaHighlight(float start, float end) {
    if (m_highlightedStart != start || m_highlightedEnd != end) {
      float dirtyStart = start > m_highlightedStart ? m_highlightedStart : start;
      float dirtyEnd = start > m_highlightedStart ? start : m_highlightedStart;
      reloadBetweenBounds(dirtyStart, dirtyEnd);
      dirtyStart = end > m_highlightedEnd ? m_highlightedEnd : end;
      dirtyEnd = end > m_highlightedEnd ? end : m_highlightedEnd;
      reloadBetweenBounds(dirtyStart, dirtyEnd);
      if (std::isnan(start) || std::isnan(end)) {
        reloadBetweenBounds(m_highlightedStart, m_highlightedEnd);
      }
      if (std::isnan(m_highlightedStart) || std::isnan(m_highlightedEnd)) {
        reloadBetweenBounds(start, end);
      }
      m_highlightedStart = start;
      m_highlightedEnd = end;
    }
  }
  
  void FunctionGraphView::setAreaHighlightColor(bool highlightColor) {
    if (m_shouldColorHighlighted != highlightColor) {
      reloadBetweenBounds(m_highlightedStart, m_highlightedEnd);
      m_shouldColorHighlighted = highlightColor;
    }
  }
  
  char * FunctionGraphView::label(Axis axis, int index) const {
    return (axis == Axis::Horizontal ? (char *)m_xLabels[index] : (char *)m_yLabels[index]);
  }
  
  void FunctionGraphView::reloadBetweenBounds(float start, float end) {
    if (start == end) {
      return;
    }
    float pixelLowerBound = floatToPixel(Axis::Horizontal, start)-2.0;
    float pixelUpperBound = floatToPixel(Axis::Horizontal, end)+4.0;
    /* We exclude the banner frame from the dirty zone to avoid unnecessary
     * redrawing */
    KDRect dirtyZone(KDRect(pixelLowerBound, 0, pixelUpperBound-pixelLowerBound,
          bounds().height()-m_bannerView->bounds().height()));
    markRectAsDirty(dirtyZone);
  }
  
  
  }