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#52 Add background to category legend

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This commit is contained in:
Jacob Støren 2018-03-08 11:38:51 +01:00
parent c258528dc5
commit 7bd08067a9
2 changed files with 81 additions and 8 deletions
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65
Fwk/AppFwk/cafVizExtensions/cafCategoryLegend.cpp
View File

@ -27,6 +27,7 @@
#endif
#include "cvfScalarMapper.h"
#include "cafInternalLegendRenderTools.h"
using namespace cvf;
@ -41,6 +42,9 @@ CategoryLegend::CategoryLegend(Font* font, const CategoryMapper* categoryMapper)
: m_sizeHint(200, 200),
m_textColor(Color3::BLACK),
m_lineColor(Color3::BLACK),
m_backgroundColor(1.0f, 1.0f, 1.0f, 0.8f),
m_backgroundFrameColor(0.0f, 0.0f, 0.0f, 0.5f),
m_isBackgroundEnabled(true),
m_lineWidth(1),
m_font(font),
m_categoryMapper(categoryMapper)
@ -156,7 +160,10 @@ bool CategoryLegend::pick(int oglXCoord, int oglYCoord, const Vec2i& position, c
//--------------------------------------------------------------------------------------------------
/// Set up camera/viewport and render
//--------------------------------------------------------------------------------------------------
void CategoryLegend::renderGeneric(OpenGLContext* oglContext, const Vec2i& position, const Vec2ui& size, bool software)
void CategoryLegend::renderGeneric(OpenGLContext* oglContext,
const Vec2i& position,
const Vec2ui& size,
bool software)
{
if (size.x() <= 0 || size.y() <= 0)
{
@ -176,18 +183,30 @@ void CategoryLegend::renderGeneric(OpenGLContext* oglContext, const Vec2i& posit
layoutInfo(&layout);
// Set up text drawer
float maxLegendRightPos = 0;
TextDrawer textDrawer(m_font.p());
setupTextDrawer(&textDrawer, &layout);
setupTextDrawer(&textDrawer, &layout, &maxLegendRightPos);
Vec2f backgroundSize(maxLegendRightPos + 3.0f, (float)size.y());
// Do the actual rendering
if (software)
{
if (m_isBackgroundEnabled) InternalLegendRenderTools::renderBackgroundImmediateMode(oglContext,
backgroundSize,
m_backgroundColor,
m_backgroundFrameColor);
renderLegendImmediateMode(oglContext, &layout);
textDrawer.renderSoftware(oglContext, camera);
}
else
{
const MatrixState matrixState(camera);
if (m_isBackgroundEnabled) InternalLegendRenderTools::renderBackgroundUsingShaders(oglContext,
matrixState,
backgroundSize,
m_backgroundColor,
m_backgroundFrameColor);
renderLegendUsingShaders(oglContext, &layout, matrixState);
textDrawer.render(oglContext, camera);
}
@ -198,7 +217,9 @@ void CategoryLegend::renderGeneric(OpenGLContext* oglContext, const Vec2i& posit
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void CategoryLegend::setupTextDrawer(TextDrawer* textDrawer, OverlayColorLegendLayoutInfo* layout)
void CategoryLegend::setupTextDrawer(TextDrawer* textDrawer,
OverlayColorLegendLayoutInfo* layout,
float* maxLegendRightPos)
{
if (m_categoryMapper.isNull())
{
@ -207,6 +228,8 @@ void CategoryLegend::setupTextDrawer(TextDrawer* textDrawer, OverlayColorLegendL
CVF_ASSERT(layout);
float legendRight = 0.0f;
textDrawer->setVerticalAlignment(TextDrawer::CENTER);
textDrawer->setTextColor(m_textColor);
@ -251,6 +274,9 @@ void CategoryLegend::setupTextDrawer(TextDrawer* textDrawer, OverlayColorLegendL
Vec2f pos(textX, textY);
textDrawer->addText(displayText, pos);
float neededRightPos = pos.x() + m_font->textExtent(displayText).x();
legendRight = legendRight >= neededRightPos ? legendRight :neededRightPos;
lastVisibleTextY = textY;
m_visibleCategoryLabels.push_back(true);
}
@ -261,14 +287,21 @@ void CategoryLegend::setupTextDrawer(TextDrawer* textDrawer, OverlayColorLegendL
Vec2f pos(layout->margins.x(), titleY);
textDrawer->addText(m_titleStrings[it], pos);
float neededRightPos = pos.x() + m_font->textExtent(m_titleStrings[it]).x();
legendRight = legendRight >= neededRightPos ? legendRight :neededRightPos;
titleY -= layout->lineSpacing;
}
*maxLegendRightPos = legendRight;
}
//--------------------------------------------------------------------------------------------------
/// Draw the legend using shader programs
//--------------------------------------------------------------------------------------------------
void CategoryLegend::renderLegendUsingShaders(OpenGLContext* oglContext, OverlayColorLegendLayoutInfo* layout, const MatrixState& matrixState)
void CategoryLegend::renderLegendUsingShaders(OpenGLContext* oglContext,
OverlayColorLegendLayoutInfo* layout,
const MatrixState& matrixState)
{
CVF_CALLSITE_OPENGL(oglContext);
@ -530,6 +563,30 @@ void CategoryLegend::setLineWidth(int lineWidth)
m_lineWidth = lineWidth;
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void CategoryLegend::setBackgroundColor(const Color4f& backgroundColor)
{
m_backgroundColor = backgroundColor;
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void CategoryLegend::setBackgroundFrameColor(const Color4f& backgroundFrameColor)
{
m_backgroundFrameColor = backgroundFrameColor;
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void CategoryLegend::enableBackground(bool enable)
{
m_isBackgroundEnabled = enable;
}

24
Fwk/AppFwk/cafVizExtensions/cafCategoryLegend.h
View File

@ -36,6 +36,10 @@ public:
void setLineWidth(int lineWidth);
void setTitle(const cvf::String& title);
void enableBackground(bool enable);
void setBackgroundColor(const cvf::Color4f& backgroundColor);
void setBackgroundFrameColor(const cvf::Color4f& backgroundFrameColor);
size_t categoryCount() const;
protected:
@ -73,10 +77,18 @@ protected:
void layoutInfo(OverlayColorLegendLayoutInfo* layout);
void renderGeneric(cvf::OpenGLContext* oglContext, const cvf::Vec2i& position, const cvf::Vec2ui& size, bool software);
void setupTextDrawer(cvf::TextDrawer* textDrawer, OverlayColorLegendLayoutInfo* layout);
void renderLegendUsingShaders(cvf::OpenGLContext* oglContext, OverlayColorLegendLayoutInfo* layout, const cvf::MatrixState& matrixState);
void renderLegendImmediateMode(cvf::OpenGLContext* oglContext, OverlayColorLegendLayoutInfo* layout);
void renderGeneric(cvf::OpenGLContext* oglContext,
const cvf::Vec2i& position,
const cvf::Vec2ui& size,
bool software);
void setupTextDrawer(cvf::TextDrawer* textDrawer,
OverlayColorLegendLayoutInfo* layout,
float* maxLegendRightPos);
void renderLegendUsingShaders(cvf::OpenGLContext* oglContext,
OverlayColorLegendLayoutInfo* layout,
const cvf::MatrixState& matrixState);
void renderLegendImmediateMode(cvf::OpenGLContext* oglContext,
OverlayColorLegendLayoutInfo* layout);
protected:
std::vector<bool> m_visibleCategoryLabels; // Skip labels ending up on top of previous visible label
@ -89,6 +101,10 @@ protected:
std::vector<cvf::String> m_titleStrings;
cvf::ref<cvf::Font> m_font;
bool m_isBackgroundEnabled;
cvf::Color4f m_backgroundColor;
cvf::Color4f m_backgroundFrameColor;
cvf::cref<CategoryMapper> m_categoryMapper;
};