Adds the ability to display text in a textfield when the text is

views/controls/textfield/gtk_views_entry.cc

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "views/controls/textfield/gtk_views_entry.h"
+
+#include "app/gfx/canvas_paint.h"
+#include "base/utf_string_conversions.h"
+#include "gfx/insets.h"
+#include "gfx/skia_utils_gtk.h"
+#include "views/controls/textfield/native_textfield_gtk.h"
+#include "views/controls/textfield/textfield.h"
+
+G_BEGIN_DECLS
+
+G_DEFINE_TYPE(GtkViewsEntry, gtk_views_entry, GTK_TYPE_ENTRY)
+
+static gint gtk_views_entry_expose_event(GtkWidget *widget,
+                                         GdkEventExpose *event) {
+  gint result = GTK_WIDGET_CLASS(gtk_views_entry_parent_class)->expose_event(
+      widget, event);
+
+  GtkEntry* entry = GTK_ENTRY(widget);
+  views::NativeTextfieldGtk* host = GTK_VIEWS_ENTRY(widget)->host;
+
+  // Internally GtkEntry creates an additional window (text_area) that the
+  // text is drawn to. We only need paint after that window has painted.
+  if (host && event->window == entry->text_area &&
+      !host->textfield()->text_to_display_when_empty().empty() &&
+      g_utf8_strlen(gtk_entry_get_text(entry), -1) == 0) {
+    gfx::CanvasPaint canvas(event);
+    if (!canvas.is_empty()) {
+      gfx::Insets insets =
+          views::NativeTextfieldGtk::GetEntryInnerBorder(entry);
+      gfx::Font font = host->textfield()->font();
+      const string16 text = host->textfield()->text_to_display_when_empty();
+      canvas.DrawStringInt(
+          UTF16ToWide(text), font,
+          gfx::GdkColorToSkColor(widget->style->text[GTK_STATE_INSENSITIVE]),
+          insets.left(), insets.top(),
+          widget->allocation.width - insets.width(), font.height());
+    }
+  }
+
+  return result;
+}
+
+static void gtk_views_entry_class_init(GtkViewsEntryClass* views_entry_class) {
+  GtkWidgetClass* widget_class =
+      reinterpret_cast<GtkWidgetClass*>(views_entry_class);
+  widget_class->expose_event = gtk_views_entry_expose_event;
+}
+
+static void gtk_views_entry_init(GtkViewsEntry* entry) {
+  entry->host = NULL;
+}
+
+GtkWidget* gtk_views_entry_new(views::NativeTextfieldGtk* host) {
+  gpointer entry = g_object_new(GTK_TYPE_VIEWS_ENTRY, NULL);
+  GTK_VIEWS_ENTRY(entry)->host = host;
+  return GTK_WIDGET(entry);
+}
+
+G_END_DECLS