Example #1
0
 void updateLayout (const int width)
 {
     TextLayout text;
     text.appendText (getText(), getFont());
     text.layout (width - 8, Justification::topLeft, true);
     setSize (width, jmin (width, text.getHeight() + (int) getFont().getHeight()));
 }
Example #2
0
    void updateLayout (const int width)
    {
        AttributedString s;
        s.setJustification (Justification::topLeft);
        s.append (getText(), getFont());

        TextLayout text;
        text.createLayoutWithBalancedLineLengths (s, width - 8.0f);
        setSize (width, jmin (width, (int) (text.getHeight() + getFont().getHeight())));
    }
    void createLayout (TextLayout& layout, const AttributedString& text, IDWriteFactory& directWriteFactory,
                       ID2D1Factory& direct2dFactory, IDWriteFontCollection& fontCollection)
    {
        // To add color to text, we need to create a D2D render target
        // Since we are not actually rendering to a D2D context we create a temporary GDI render target

        D2D1_RENDER_TARGET_PROPERTIES d2dRTProp = D2D1::RenderTargetProperties (D2D1_RENDER_TARGET_TYPE_SOFTWARE,
                                                                                D2D1::PixelFormat (DXGI_FORMAT_B8G8R8A8_UNORM,
                                                                                                   D2D1_ALPHA_MODE_IGNORE),
                                                                                0, 0,
                                                                                D2D1_RENDER_TARGET_USAGE_GDI_COMPATIBLE,
                                                                                D2D1_FEATURE_LEVEL_DEFAULT);
        ComSmartPtr<ID2D1DCRenderTarget> renderTarget;
        HRESULT hr = direct2dFactory.CreateDCRenderTarget (&d2dRTProp, renderTarget.resetAndGetPointerAddress());

        ComSmartPtr<IDWriteTextLayout> dwTextLayout;

        if (! setupLayout (text, layout.getWidth(), layout.getHeight(), *renderTarget,
                           directWriteFactory, fontCollection, dwTextLayout))
            return;

        UINT32 actualLineCount = 0;
        hr = dwTextLayout->GetLineMetrics (nullptr, 0, &actualLineCount);

        layout.ensureStorageAllocated (actualLineCount);

        {
            ComSmartPtr<CustomDirectWriteTextRenderer> textRenderer (new CustomDirectWriteTextRenderer (fontCollection, text));
            hr = dwTextLayout->Draw (&layout, textRenderer, 0, 0);
        }

        HeapBlock<DWRITE_LINE_METRICS> dwLineMetrics (actualLineCount);
        hr = dwTextLayout->GetLineMetrics (dwLineMetrics, actualLineCount, &actualLineCount);
        int lastLocation = 0;
        const int numLines = jmin ((int) actualLineCount, layout.getNumLines());
        float yAdjustment = 0;
        const float extraLineSpacing = text.getLineSpacing();

        for (int i = 0; i < numLines; ++i)
        {
            TextLayout::Line& line = layout.getLine (i);
            line.stringRange = Range<int> (lastLocation, (int) lastLocation + dwLineMetrics[i].length);
            line.lineOrigin.y += yAdjustment;
            yAdjustment += extraLineSpacing;
            lastLocation += dwLineMetrics[i].length;
        }
    }
    void createLayout (TextLayout& layout, const AttributedString& text,
                       IDWriteFactory& directWriteFactory,
                       IDWriteFontCollection& fontCollection,
                       ID2D1DCRenderTarget& renderTarget)
    {
        ComSmartPtr<IDWriteTextLayout> dwTextLayout;

        if (! setupLayout (text, layout.getWidth(), layout.getHeight(), renderTarget,
                           directWriteFactory, fontCollection, dwTextLayout))
            return;

        UINT32 actualLineCount = 0;
        HRESULT hr = dwTextLayout->GetLineMetrics (nullptr, 0, &actualLineCount);

        layout.ensureStorageAllocated (actualLineCount);

        {
            ComSmartPtr<CustomDirectWriteTextRenderer> textRenderer (new CustomDirectWriteTextRenderer (fontCollection, text));
            hr = dwTextLayout->Draw (&layout, textRenderer, 0, 0);
        }

        HeapBlock<DWRITE_LINE_METRICS> dwLineMetrics (actualLineCount);
        hr = dwTextLayout->GetLineMetrics (dwLineMetrics, actualLineCount, &actualLineCount);
        int lastLocation = 0;
        const int numLines = jmin ((int) actualLineCount, layout.getNumLines());
        float yAdjustment = 0;
        const float extraLineSpacing = text.getLineSpacing();

        for (int i = 0; i < numLines; ++i)
        {
            TextLayout::Line& line = layout.getLine (i);
            line.stringRange = Range<int> (lastLocation, (int) lastLocation + dwLineMetrics[i].length);
            line.lineOrigin.y += yAdjustment;
            yAdjustment += extraLineSpacing;
            lastLocation += dwLineMetrics[i].length;
        }
    }