Show previews of style presets in sidebar

Change-Id: I0e3d6f00a79bc33e1db1329df217e7e867dfd511

6 files changed, 159 insertions, 16 deletions

diff --git a/include/sfx2/StylePreviewRenderer.hxx b/include/sfx2/StylePreviewRenderer.hxx
index bc77e20792d1..1fc980409e99 100644
--- a/include/sfx2/StylePreviewRenderer.hxx
+++ b/include/sfx2/StylePreviewRenderer.hxx
@@ -26,8 +26,14 @@ protected:
     OutputDevice& mrOutputDev;
     SfxStyleSheetBase* mpStyle;
     long mnMaxHeight;
+    OUString msRenderText;
 
 public:
+    enum class RenderAlign
+    {
+        TOP, CENTER, BOTTOM
+    };
+
     StylePreviewRenderer(const SfxObjectShell& rShell,
                          OutputDevice& rOutputDev,
                          SfxStyleSheetBase* pStyle,
@@ -36,14 +42,20 @@ public:
         , mrOutputDev(rOutputDev)
         , mpStyle(pStyle)
         , mnMaxHeight(nMaxHeight)
+        , msRenderText()
     {}
 
     virtual ~StylePreviewRenderer()
     {}
 
+    void setRenderText(OUString& rRenderText)
+    {
+        msRenderText = rRenderText;
+    }
+
     virtual bool recalculate() = 0;
     virtual Size getRenderSize() = 0;
-    virtual bool render(const Rectangle& aRectangle) = 0;
+    virtual bool render(const Rectangle& aRectangle, RenderAlign eRenderAlign = RenderAlign::CENTER) = 0;
 };
 
 } // end namespace sfx2
diff --git a/include/svx/CommonStylePreviewRenderer.hxx b/include/svx/CommonStylePreviewRenderer.hxx
index 1e7d54e0c6ae..49717b574854 100644
--- a/include/svx/CommonStylePreviewRenderer.hxx
+++ b/include/svx/CommonStylePreviewRenderer.hxx
@@ -35,7 +35,7 @@ public:
 
     virtual bool recalculate() SAL_OVERRIDE;
     virtual Size getRenderSize() SAL_OVERRIDE;
-    virtual bool render(const Rectangle& aRectangle) SAL_OVERRIDE;
+    virtual bool render(const Rectangle& aRectangle, RenderAlign eRenderAlign = RenderAlign::CENTER) SAL_OVERRIDE;
 };
 
 } // end namespace svx
diff --git a/svx/source/styles/CommonStylePreviewRenderer.cxx b/svx/source/styles/CommonStylePreviewRenderer.cxx
index ab1271ac8fe0..2d9ac3f5dd10 100644
--- a/svx/source/styles/CommonStylePreviewRenderer.cxx
+++ b/svx/source/styles/CommonStylePreviewRenderer.cxx
@@ -174,8 +174,10 @@ Size CommonStylePreviewRenderer::getRenderSize()
     return maPixelSize;
 }
 
-bool CommonStylePreviewRenderer::render(const Rectangle& aRectangle)
+bool CommonStylePreviewRenderer::render(const Rectangle& aRectangle, RenderAlign eRenderAlign)
 {
+    const OUString& rText = msRenderText.isEmpty() ? maStyleName : msRenderText;
+
     // setup the device & draw
     vcl::Font aOldFont(mrOutputDev.GetFont());
     Color aOldColor(mrOutputDev.GetTextColor());
@@ -192,10 +194,18 @@ bool CommonStylePreviewRenderer::render(const Rectangle& aRectangle)
         mrOutputDev.SetTextColor(maFontColor);
 
     Point aFontDrawPosition = aRectangle.TopLeft();
-    if (aRectangle.GetHeight() > maPixelSize.Height())
-        aFontDrawPosition.Y() += ( aRectangle.GetHeight() - maPixelSize.Height() ) / 2;
+    if (eRenderAlign == RenderAlign::CENTER)
+    {
+        if (aRectangle.GetHeight() > maPixelSize.Height())
+            aFontDrawPosition.Y() += (aRectangle.GetHeight() - maPixelSize.Height()) / 2;
+    }
+    else if (eRenderAlign == RenderAlign::BOTTOM)
+    {
+        if (aRectangle.GetHeight() > maPixelSize.Height())
+            aFontDrawPosition.Y() += aRectangle.GetHeight() - maPixelSize.Height();
+    }
 
-    mrOutputDev.DrawText(aFontDrawPosition, maStyleName);
+    mrOutputDev.DrawText(aFontDrawPosition, rText);
 
     mrOutputDev.SetFillColor(aOldFillColor);
     mrOutputDev.SetTextColor(aOldColor);
diff --git a/sw/source/uibase/sidebar/StylePresetsPanel.cxx b/sw/source/uibase/sidebar/StylePresetsPanel.cxx
index 7a4dbfc2933a..957f0508b008 100644
--- a/sw/source/uibase/sidebar/StylePresetsPanel.cxx
+++ b/sw/source/uibase/sidebar/StylePresetsPanel.cxx
@@ -63,14 +63,18 @@ StylePresetsPanel::StylePresetsPanel(vcl::Window* pParent,
     : PanelLayout(pParent, "StylePresetsPanel", "modules/swriter/ui/sidebarstylepresets.ui", rxFrame)
     , mpBindings(pBindings)
 {
+    get(mpValueSet, "valueset");
 
-    get(mpListBox, "listbox");
+    mpValueSet->SetColCount(2);
 
-    mpListBox->SetDoubleClickHdl(LINK(this, StylePresetsPanel, DoubleClickHdl));
+    mpValueSet->SetDoubleClickHdl(LINK(this, StylePresetsPanel, DoubleClickHdl));
 
+    RefreshList();
+}
 
+void StylePresetsPanel::RefreshList()
+{
     SfxDocumentTemplates aTemplates;
-
     sal_uInt16 nCount = aTemplates.GetRegionCount();
     for (sal_uInt16 i = 0; i < nCount; ++i)
     {
@@ -81,14 +85,112 @@ StylePresetsPanel::StylePresetsPanel(vcl::Window* pParent,
             {
                 OUString aName = aTemplates.GetName(i,j);
                 OUString aURL = aTemplates.GetPath(i,j);
-                sal_Int32 nIndex = mpListBox->InsertEntry(aName);
+                BitmapEx aPreview = CreatePreview(aURL, aName);
+                mpValueSet->InsertItem(j, Image(aPreview), aName);
                 maTemplateEntries.push_back(std::unique_ptr<TemplateEntry>(new TemplateEntry(aName, aURL)));
-                mpListBox->SetEntryData(nIndex, maTemplateEntries.back().get());
+                mpValueSet->SetItemData(j, maTemplateEntries.back().get());
             }
         }
     }
 }
 
+BitmapEx StylePresetsPanel::CreatePreview(OUString& aUrl, OUString& aName)
+{
+    SfxMedium aMedium(aUrl, STREAM_STD_READWRITE);
+    SfxObjectShell* pObjectShell = SfxObjectShell::Current();
+    SfxObjectShellLock xTemplDoc = pObjectShell->CreateObjectByFactoryName(pObjectShell->GetFactory().GetFactoryName(), SfxObjectCreateMode::ORGANIZER);
+    xTemplDoc->DoInitNew(0);
+    if (xTemplDoc->LoadFrom(aMedium))
+    {
+        return GenerateStylePreview(*xTemplDoc, aName);
+    }
+    return BitmapEx();
+}
+
+void renderPreview(sfx2::StyleManager* pStyleManager, OutputDevice& aOutputDevice,
+                   OUString sName, sal_Int32 nHeight, Rectangle& aRect)
+{
+    sfx2::StylePreviewRenderer* pStylePreviewRenderer;
+
+    SfxStyleSheetBase* pStyleSheet = pStyleManager->Search(sName, SFX_STYLE_FAMILY_PARA);
+
+    if (pStyleSheet)
+    {
+        pStylePreviewRenderer = pStyleManager->CreateStylePreviewRenderer(aOutputDevice, pStyleSheet, nHeight);
+        pStylePreviewRenderer->recalculate();
+        pStylePreviewRenderer->render(aRect, sfx2::StylePreviewRenderer::RenderAlign::TOP);
+    }
+}
+
+BitmapEx StylePresetsPanel::GenerateStylePreview(SfxObjectShell& rSource, OUString& aName)
+{
+    sfx2::StyleManager* pStyleManager = rSource.GetStyleManager();
+
+    ScopedVclPtrInstance<VirtualDevice> pVirtualDev(*Application::GetDefaultDevice());
+
+    sal_Int32 nScalingFactor = pVirtualDev->GetDPIScaleFactor();
+
+    sal_Int32 nMargin = 6 * nScalingFactor;
+
+    sal_Int32 nPreviewWidth = 144 * nScalingFactor;
+
+    sal_Int32 nNameHeight = 16 * nScalingFactor;
+    sal_Int32 nTitleHeight = 32 * nScalingFactor;
+    sal_Int32 nHeadingHeight = 24 * nScalingFactor;
+    sal_Int32 nTextBodyHeight = 16 * nScalingFactor;
+    sal_Int32 nBottomMargin = 2 * nScalingFactor;
+
+    sal_Int32 nNameFontSize = 12 * nScalingFactor;
+
+    sal_Int32 nPreviewHeight = nNameHeight + nTitleHeight + nHeadingHeight + nTextBodyHeight + nBottomMargin;
+
+    Size aSize(nPreviewWidth, nPreviewHeight);
+
+    pVirtualDev->SetOutputSizePixel(aSize);
+
+    pVirtualDev->SetLineColor(COL_LIGHTGRAY);
+    pVirtualDev->SetFillColor();
+
+    long y = 0;
+    {
+        pVirtualDev->SetFillColor(COL_LIGHTGRAY);
+        Rectangle aNameRect(0, y, nPreviewWidth, nNameHeight);
+        pVirtualDev->DrawRect(aNameRect);
+
+        vcl::Font aFont;
+        aFont.SetSize(Size(0, nNameFontSize));
+
+        pVirtualDev->SetFont(aFont);
+
+        Size aTextSize(pVirtualDev->GetTextWidth(aName), pVirtualDev->GetTextHeight());
+
+        Point aPoint((aNameRect.GetWidth()  / 2.0) - (aTextSize.Width()  / 2.0),
+                     y + (aNameRect.GetHeight() / 2.0) - (aTextSize.Height() / 2.0));
+
+        pVirtualDev->DrawText(aPoint, aName);
+
+        y += nNameHeight;
+    }
+
+    {
+        Rectangle aRenderRect(Point(nMargin, y), aSize);
+        renderPreview(pStyleManager, *pVirtualDev.get(), "Title", nTitleHeight, aRenderRect);
+        y += nTitleHeight;
+    }
+
+    {
+        Rectangle aRenderRect(Point(nMargin, y), aSize);
+        renderPreview(pStyleManager, *pVirtualDev.get(), "Heading 1", nHeadingHeight, aRenderRect);
+        y += nHeadingHeight;
+    }
+    {
+        Rectangle aRenderRect(Point(nMargin, y), aSize);
+        renderPreview(pStyleManager, *pVirtualDev.get(), "Text Body", nTextBodyHeight, aRenderRect);
+    }
+
+    return pVirtualDev->GetBitmapEx(Point(), aSize);
+}
+
 StylePresetsPanel::~StylePresetsPanel()
 {
     disposeOnce();
@@ -96,15 +198,15 @@ StylePresetsPanel::~StylePresetsPanel()
 
 void StylePresetsPanel::dispose()
 {
-    mpListBox.disposeAndClear();
+    mpValueSet.disposeAndClear();
 
     PanelLayout::dispose();
 }
 
 IMPL_LINK_NOARG(StylePresetsPanel, DoubleClickHdl)
 {
-    sal_Int32 nIndex = mpListBox->GetSelectEntryPos();
-    TemplateEntry* pEntry = static_cast<TemplateEntry*>(mpListBox->GetEntryData(nIndex));
+    sal_Int32 nItemId = mpValueSet->GetSelectItemId();
+    TemplateEntry* pEntry = static_cast<TemplateEntry*>(mpValueSet->GetItemData(nItemId));
 
     SwDocShell* pDocSh = static_cast<SwDocShell*>(SfxObjectShell::Current());
     if (pDocSh)
@@ -115,7 +217,7 @@ IMPL_LINK_NOARG(StylePresetsPanel, DoubleClickHdl)
         pDocSh->LoadStylesFromFile(pEntry->maURL, aOption, false);
     }
 
-    return 1;
+    return 0;
 }
 
 void StylePresetsPanel::NotifyItemUpdate(const sal_uInt16 /*nSId*/,
diff --git a/sw/source/uibase/sidebar/StylePresetsPanel.hxx b/sw/source/uibase/sidebar/StylePresetsPanel.hxx
index dd2a7c7be8b6..fd51cf416e20 100644
--- a/sw/source/uibase/sidebar/StylePresetsPanel.hxx
+++ b/sw/source/uibase/sidebar/StylePresetsPanel.hxx
@@ -19,6 +19,8 @@
 
 #include <sfx2/sidebar/ControllerItem.hxx>
 
+#include <sfx2/objsh.hxx>
+
 #include <svx/pageitem.hxx>
 #include <svx/rulritem.hxx>
 #include <editeng/sizeitem.hxx>
@@ -32,6 +34,8 @@
 #include <svl/intitem.hxx>
 #include <svl/lstner.hxx>
 
+#include <svtools/valueset.hxx>
+
 #include <svx/fntctrl.hxx>
 
 #include "docstyle.hxx"
@@ -64,6 +68,10 @@ private:
         OUString maURL;
     };
 
+    void RefreshList();
+    BitmapEx CreatePreview(OUString& aUrl, OUString& aName);
+    BitmapEx GenerateStylePreview(SfxObjectShell& rSource, OUString& aName);
+
     StylePresetsPanel(vcl::Window* pParent,
                    const css::uno::Reference<css::frame::XFrame>& rxFrame,
                    SfxBindings* pBindings);
@@ -73,7 +81,7 @@ private:
 
     SfxBindings* mpBindings;
 
-    VclPtr<ListBox> mpListBox;
+    VclPtr<ValueSet> mpValueSet;
 
     std::vector<std::unique_ptr<TemplateEntry>> maTemplateEntries;
 
diff --git a/sw/uiconfig/swriter/ui/sidebarstylepresets.ui b/sw/uiconfig/swriter/ui/sidebarstylepresets.ui
index 071e9e57ec29..fc64564fea38 100644
--- a/sw/uiconfig/swriter/ui/sidebarstylepresets.ui
+++ b/sw/uiconfig/swriter/ui/sidebarstylepresets.ui
@@ -2,6 +2,7 @@
 <!-- Generated with glade 3.18.3 -->
 <interface>
   <requires lib="gtk+" version="3.0"/>
+  <requires lib="LibreOffice" version="1.0"/>
   <object class="GtkGrid" id="StylePresetsPanel">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
@@ -31,6 +32,16 @@
                 <property name="top_attach">0</property>
               </packing>
             </child>
+            <child>
+              <object class="svtlo-ValueSet" id="valueset">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+              </object>
+              <packing>
+                <property name="left_attach">0</property>
+                <property name="top_attach">1</property>
+              </packing>
+            </child>
           </object>
         </child>
       </object>