src/preferences/screensaver/PreviewView.cpp

   1 /*
   2  * Copyright 2003-2013 Haiku, Inc. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Michael Phipps
   7  *              Jérôme Duval, jerome.duval@free.fr
   8  */
   9
  10
  11 #include "PreviewView.h"
  12
  13 #include <iostream>
  14
  15 #include <CardLayout.h>
  16 #include <Catalog.h>
  17 #include <GroupLayout.h>
  18 #include <Point.h>
  19 #include <Rect.h>
  20 #include <Size.h>
  21 #include <StringView.h>
  22 #include <TextView.h>
  23
  24 #include "Utility.h"
  25
  26
  27 static const rgb_color kWhite = (rgb_color){ 255, 255, 255 };
  28
  29
  30 #undef B_TRANSLATION_CONTEXT
  31 #define B_TRANSLATION_CONTEXT "PreviewView"
  32
  33
  34 static float sampleX[]
  35         = { 0, 0.05, 0.15, 0.7, 0.725, 0.8, 0.825, 0.85, 0.950, 1.0 };
  36 static float sampleY[] = { 0, 0.05, 0.90, 0.95, 0.966, 0.975, 1.0 };
  37
  38
  39 inline BPoint
  40 scale2(int x, int y, BRect area)
  41 {
  42         return scale_direct(sampleX[x], sampleY[y], area);
  43 }
  44
  45
  46 inline BRect
  47 scale2(int x1, int x2, int y1, int y2, BRect area)
  48 {
  49         return scale_direct(sampleX[x1], sampleX[x2], sampleY[y1], sampleY[y2],
  50                 area);
  51 }
  52
  53
  54 //      #pragma mark - PreviewView
  55
  56
  57 PreviewView::PreviewView(const char* name)
  58         :
  59         BView(name, B_WILL_DRAW | B_FULL_UPDATE_ON_RESIZE),
  60         fSaverView(NULL),
  61         fNoPreview(NULL)
  62 {
  63         SetViewColor(ui_color(B_PANEL_BACKGROUND_COLOR));
  64
  65         BGroupLayout* layout = new BGroupLayout(B_VERTICAL);
  66         // We draw the "monitor" around the preview, hence the strange insets.
  67         layout->SetInsets(7, 6, 8, 12);
  68         SetLayout(layout);
  69
  70         // A BStringView would be enough, if only it handled word wrapping.
  71         fNoPreview = new BTextView("no preview");
  72         fNoPreview->SetText(B_TRANSLATE("No preview available"));
  73         fNoPreview->SetFontAndColor(be_plain_font, B_FONT_ALL, &kWhite);
  74         fNoPreview->MakeEditable(false);
  75         fNoPreview->MakeResizable(false);
  76         fNoPreview->MakeSelectable(false);
  77         fNoPreview->SetViewColor(0, 0, 0);
  78         fNoPreview->SetLowColor(0, 0, 0);
  79
  80         fNoPreview->Hide();
  81
  82         BView* container = new BView("preview container", 0);
  83         container->SetLayout(new BCardLayout());
  84         AddChild(container);
  85         container->SetViewColor(0, 0, 0);
  86         container->SetLowColor(0, 0, 0);
  87         container->AddChild(fNoPreview);
  88
  89         fNoPreview->SetHighColor(255, 255, 255);
  90         fNoPreview->SetAlignment(B_ALIGN_CENTER);
  91 }
  92
  93
  94 PreviewView::~PreviewView()
  95 {
  96 }
  97
  98
  99 void
 100 PreviewView::Draw(BRect updateRect)
 101 {
 102         SetHighColor(184, 184, 184);
 103         FillRoundRect(scale2(0, 9, 0, 3, Bounds()), 4, 4);
 104                 // outer shape
 105         FillRoundRect(scale2(2, 7, 3, 6, Bounds()), 2, 2);
 106                 // control console outline
 107
 108         SetHighColor(96, 96, 96);
 109         StrokeRoundRect(scale2(2, 7, 3, 6, Bounds()), 2, 2);
 110                 // control console outline
 111         StrokeRoundRect(scale2(0, 9, 0, 3, Bounds()), 4, 4);
 112                 // outline outer shape
 113
 114         SetHighColor(0, 0, 0);
 115         FillRect(scale2(1, 8, 1, 2, Bounds()));
 116
 117         SetHighColor(184, 184, 184);
 118         BRect outerShape = scale2(2, 7, 2, 6, Bounds());
 119         outerShape.InsetBy(1, 1);
 120         FillRoundRect(outerShape, 4, 4);
 121                 // outer shape
 122
 123         SetHighColor(0, 255, 0);
 124         FillRect(scale2(3, 4, 4, 5, Bounds()));
 125         SetHighColor(96, 96, 96);
 126         FillRect(scale2(5, 6, 4, 5, Bounds()));
 127 }
 128
 129
 130 BView*
 131 PreviewView::AddPreview()
 132 {
 133         fSaverView = new BView("preview", B_WILL_DRAW);
 134         fSaverView->SetViewColor(0, 0, 0);
 135         fSaverView->SetLowColor(0, 0, 0);
 136         ChildAt(0)->AddChild(fSaverView);
 137
 138         float aspectRatio = 4.0f / 3.0f;
 139                 // 4:3 monitor
 140         float previewWidth = 120.0f;
 141         float previewHeight = ceilf(previewWidth / aspectRatio);
 142
 143         fSaverView->SetExplicitSize(BSize(previewWidth, previewHeight));
 144         fSaverView->ResizeTo(previewWidth, previewHeight);
 145
 146         fNoPreview->SetExplicitSize(BSize(previewWidth, previewHeight));
 147         fNoPreview->ResizeTo(previewWidth, previewHeight);
 148         fNoPreview->SetInsets(0, previewHeight / 3, 0 , 0);
 149
 150         return fSaverView;
 151 }
 152
 153
 154 BView*
 155 PreviewView::RemovePreview()
 156 {
 157         ShowNoPreview();
 158
 159         if (fSaverView != NULL)
 160                 ChildAt(0)->RemoveChild(fSaverView);
 161
 162         BView* saverView = fSaverView;
 163         fSaverView = NULL;
 164         return saverView;
 165 }
 166
 167
 168 BView*
 169 PreviewView::SaverView()
 170 {
 171         return fSaverView;
 172 }
 173
 174
 175 void
 176 PreviewView::ShowNoPreview() const
 177 {
 178         ((BCardLayout*)ChildAt(0)->GetLayout())->SetVisibleItem((int32)0);
 179 }
 180
 181
 182 void
 183 PreviewView::HideNoPreview() const
 184 {
 185         ((BCardLayout*)ChildAt(0)->GetLayout())->SetVisibleItem(1);
 186 }