src/preferences/screensaver/PreviewView.cpp

   1 /*
   2  * Copyright 2003-2015 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 <algorithm>
  14 #include <iostream>
  15
  16 #include <CardLayout.h>
  17 #include <Catalog.h>
  18 #include <GroupLayout.h>
  19 #include <Point.h>
  20 #include <Rect.h>
  21 #include <Size.h>
  22 #include <StringView.h>
  23 #include <TextView.h>
  24
  25 #include "Utility.h"
  26
  27
  28 static const rgb_color kWhite = (rgb_color){ 255, 255, 255 };
  29
  30
  31 #undef B_TRANSLATION_CONTEXT
  32 #define B_TRANSLATION_CONTEXT "PreviewView"
  33
  34
  35 static float sampleX[]
  36         = { 0, 0.05, 0.15, 0.7, 0.725, 0.8, 0.825, 0.85, 0.950, 1.0 };
  37 static float sampleY[] = { 0, 0.05, 0.90, 0.95, 0.966, 0.975, 1.0 };
  38
  39
  40 inline BPoint
  41 scale2(int x, int y, BRect area)
  42 {
  43         return scale_direct(sampleX[x], sampleY[y], area);
  44 }
  45
  46
  47 inline BRect
  48 scale2(int x1, int x2, int y1, int y2, BRect area)
  49 {
  50         return scale_direct(sampleX[x1], sampleX[x2], sampleY[y1], sampleY[y2],
  51                 area);
  52 }
  53
  54
  55 //      #pragma mark - PreviewView
  56
  57
  58 PreviewView::PreviewView(const char* name)
  59         :
  60         BView(name, B_WILL_DRAW | B_FULL_UPDATE_ON_RESIZE),
  61         fSaverView(NULL),
  62         fNoPreview(NULL)
  63 {
  64         SetViewUIColor(B_PANEL_BACKGROUND_COLOR);
  65
  66         BGroupLayout* layout = new BGroupLayout(B_VERTICAL);
  67         // We draw the "monitor" around the preview, hence the strange insets.
  68         layout->SetInsets(7, 6, 8, 12);
  69         SetLayout(layout);
  70
  71         // A BStringView would be enough, if only it handled word wrapping.
  72         fNoPreview = new BTextView("no preview");
  73         fNoPreview->SetText(B_TRANSLATE("No preview available"));
  74         fNoPreview->SetFontAndColor(be_plain_font, B_FONT_ALL, &kWhite);
  75         fNoPreview->MakeEditable(false);
  76         fNoPreview->MakeResizable(false);
  77         fNoPreview->MakeSelectable(false);
  78         fNoPreview->SetViewColor(0, 0, 0);
  79         fNoPreview->SetLowColor(0, 0, 0);
  80
  81         fNoPreview->Hide();
  82
  83         BView* container = new BView("preview container", 0);
  84         container->SetLayout(new BCardLayout());
  85         AddChild(container);
  86         container->SetViewColor(0, 0, 0);
  87         container->SetLowColor(0, 0, 0);
  88         container->AddChild(fNoPreview);
  89
  90         fNoPreview->SetHighColor(255, 255, 255);
  91         fNoPreview->SetAlignment(B_ALIGN_CENTER);
  92 }
  93
  94
  95 PreviewView::~PreviewView()
  96 {
  97 }
  98
  99
 100 void
 101 PreviewView::Draw(BRect updateRect)
 102 {
 103         SetHighColor(184, 184, 184);
 104         FillRoundRect(scale2(0, 9, 0, 3, Bounds()), 4, 4);
 105                 // outer shape
 106         FillRoundRect(scale2(2, 7, 3, 6, Bounds()), 2, 2);
 107                 // control console outline
 108
 109         SetHighColor(96, 96, 96);
 110         StrokeRoundRect(scale2(2, 7, 3, 6, Bounds()), 2, 2);
 111                 // control console outline
 112         StrokeRoundRect(scale2(0, 9, 0, 3, Bounds()), 4, 4);
 113                 // outline outer shape
 114
 115         SetHighColor(0, 0, 0);
 116         FillRect(scale2(1, 8, 1, 2, Bounds()));
 117
 118         SetHighColor(184, 184, 184);
 119         BRect outerShape = scale2(2, 7, 2, 6, Bounds());
 120         outerShape.InsetBy(1, 1);
 121         FillRoundRect(outerShape, 4, 4);
 122                 // outer shape
 123
 124         SetHighColor(0, 255, 0);
 125         FillRect(scale2(3, 4, 4, 5, Bounds()));
 126         SetHighColor(96, 96, 96);
 127         FillRect(scale2(5, 6, 4, 5, Bounds()));
 128 }
 129
 130
 131 BView*
 132 PreviewView::AddPreview()
 133 {
 134         fSaverView = new BView("preview", B_WILL_DRAW);
 135         fSaverView->SetViewColor(0, 0, 0);
 136         fSaverView->SetLowColor(0, 0, 0);
 137         ChildAt(0)->AddChild(fSaverView);
 138
 139         float aspectRatio = 4.0f / 3.0f;
 140                 // 4:3 monitor
 141         float previewWidth = 120.0f * std::max(1.0f, be_plain_font->Size() / 12.0f);
 142         float previewHeight = ceilf(previewWidth / aspectRatio);
 143
 144         fSaverView->SetExplicitSize(BSize(previewWidth, previewHeight));
 145         fSaverView->ResizeTo(previewWidth, previewHeight);
 146
 147         fNoPreview->SetExplicitSize(BSize(previewWidth, previewHeight));
 148         fNoPreview->ResizeTo(previewWidth, previewHeight);
 149         fNoPreview->SetInsets(0, previewHeight / 3, 0 , 0);
 150
 151         return fSaverView;
 152 }
 153
 154
 155 BView*
 156 PreviewView::RemovePreview()
 157 {
 158         ShowNoPreview();
 159
 160         if (fSaverView != NULL)
 161                 ChildAt(0)->RemoveChild(fSaverView);
 162
 163         BView* saverView = fSaverView;
 164         fSaverView = NULL;
 165         return saverView;
 166 }
 167
 168
 169 BView*
 170 PreviewView::SaverView()
 171 {
 172         return fSaverView;
 173 }
 174
 175
 176 void
 177 PreviewView::ShowNoPreview() const
 178 {
 179         ((BCardLayout*)ChildAt(0)->GetLayout())->SetVisibleItem((int32)0);
 180 }
 181
 182
 183 void
 184 PreviewView::HideNoPreview() const
 185 {
 186         ((BCardLayout*)ChildAt(0)->GetLayout())->SetVisibleItem(1);
 187 }